834 lines
26 KiB
Plaintext
834 lines
26 KiB
Plaintext
# Code for the first disk sector that all programs in this directory need:
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# - load sectors past the first (using BIOS primitives) since only the first is available by default
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# - if this fails, print 'D' at top-left of screen and halt
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# - initialize a minimal graphics mode
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# - switch to 32-bit mode (giving up access to BIOS primitives)
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# - set up a handler for keyboard events
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# - jump to start of program
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#
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# To convert to a disk image, first prepare a realistically sized disk image:
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# dd if=/dev/zero of=disk.img count=20160 # 512-byte sectors, so 10MB
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# Create initial sectors from this file:
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# ./bootstrap run apps/hex < baremetal/boot.hex > boot.bin
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# Translate other sectors into a file called a.img
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# Load all sectors into the disk image:
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# cat boot.bin a.img > disk.bin
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# dd if=disk.bin of=disk.img conv=notrunc
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# To run:
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# qemu-system-i386 disk.img
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# Or:
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# bochs -f baremetal/boot.bochsrc # boot.bochsrc loads disk.img
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#
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# Since we start out in 16-bit mode, we need instructions SubX doesn't
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# support.
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# This file contains just lowercase hex bytes and comments. Zero
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# error-checking. Make liberal use of:
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# - comments documenting expected offsets
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# - size checks on the emitted file (currently: 512 bytes)
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# - xxd to eyeball that offsets contain expected bytes
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#
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# Programs using this initialization:
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# - can't use any syscalls
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# - can't print text to video memory (past these boot sectors)
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# - must only print raw pixels (256 colors) to video memory (resolution 1024x768)
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# - must store their entry-point at address 0x9000
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## 16-bit entry point
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# Upon reset, the IBM PC:
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# - loads the first sector (512 bytes)
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# from some bootable image (see the boot sector marker at the end of this file)
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# to the address range [0x7c00, 0x7e00)
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# - starts executing code at address 0x7c00
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# offset 00 (address 0x7c00):
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# disable interrupts for this initialization
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fa # cli
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# initialize segment registers
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# this isn't always needed, but the recommendation is to not make assumptions
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b8 00 00 # ax <- 0
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8e d8 # ds <- ax
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8e d0 # ss <- ax
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8e c0 # es <- ax
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8e e0 # fs <- ax
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8e e8 # gs <- ax
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# We don't read or write the stack before we get to 32-bit mode. No function
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# calls, so we don't need to initialize the stack.
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# 0e:
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# load second sector from disk
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b4 02 # ah <- 2 # read sectors from disk
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# dl comes conveniently initialized at boot time with the index of the device being booted
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b5 00 # ch <- 0 # cylinder 0
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b6 00 # dh <- 0 # track 0
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b1 02 # cl <- 2 # second sector, 1-based
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b0 20 # al <- 32 # number of sectors to read; all sectors must be in a single track
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# address to write sectors to = es:bx = 0x7e00, contiguous with boot segment
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bb 00 00 # bx <- 0
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8e c3 # es <- bx
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bb 00 7e # bx <- 0x7e00 [label]
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cd 13 # int 13h, BIOS disk service
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0f 82 8a 00 # jump-if-carry disk-error [label]
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# 26:
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# undo the A20 hack: https://en.wikipedia.org/wiki/A20_line
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# this is from https://github.com/mit-pdos/xv6-public/blob/master/bootasm.S
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# seta20.1:
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e4 64 # al <- port 0x64
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a8 02 # set zf if bit 1 (second-least significant) is not set
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75 fa # if zf not set, goto seta20.1 (-6)
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b0 d1 # al <- 0xd1
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e6 64 # port 0x64 <- al
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# 30:
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# seta20.2:
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e4 64 # al <- port 0x64
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a8 02 # set zf if bit 1 (second-least significant) is not set
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75 fa # if zf not set, goto seta20.2 (-6)
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b0 df # al <- 0xdf
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e6 64 # port 0x64 <- al
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# 3a:
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# adjust video mode
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b4 4f # ah <- 4f (VBE)
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b0 02 # al <- 02 (set video mode)
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bb 05 41 # bx <- 0x0105 (graphics 1024x768x256
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# 0x4000 bit = configure linear frame buffer in Bochs emulator; hopefully this doesn't hurt anything when running natively)
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# fallback mode: 0x0101 (640x480x256)
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cd 10 # int 10h, Vesa BIOS extensions
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# 43:
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# load information for the (hopefully) current video mode
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# mostly just for the address to the linear frame buffer
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b4 4f # ah <- 4f (VBE)
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b0 01 # al <- 01 (get video mode)
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b9 07 01 # cx <- 0x0107 (mode we requested)
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bf 00 7f # di <- 0x7f00 (video mode info) [label]
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cd 10
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# 4f:
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# switch to 32-bit mode
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0f 01 16 # lgdt 00/mod/indirect 010/subop 110/rm/use-disp16
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a0 7c # *gdt_descriptor [label]
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0f 20 c0 # eax <- cr0
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66 83 c8 01 # eax <- or 0x1
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0f 22 c0 # cr0 <- eax
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ea e0 7c 08 00 # far jump to initialize_32bit_mode after setting cs to the record at offset 8 in the gdt (gdt_code) [label]
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# padding
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# 63:
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00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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## GDT: 3 records of 8 bytes each
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# 80:
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# gdt_start:
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# gdt_null: mandatory null descriptor
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00 00 00 00 00 00 00 00
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# gdt_code: (offset 8 from gdt_start)
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ff ff # limit[0:16]
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00 00 00 # base[0:24]
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9a # 1/present 00/privilege 1/descriptor type = 1001b
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# 1/code 0/conforming 1/readable 0/accessed = 1010b
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cf # 1/granularity 1/32-bit 0/64-bit-segment 0/AVL = 1100b
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# limit[16:20] = 1111b
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00 # base[24:32]
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# gdt_data: (offset 16 from gdt_start)
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ff ff # limit[0:16]
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00 00 00 # base[0:24]
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92 # 1/present 00/privilege 1/descriptor type = 1001b
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# 0/data 0/conforming 1/readable 0/accessed = 0010b
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cf # same as gdt_code
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00 # base[24:32]
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# gdt_end:
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# padding
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# 98:
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00 00 00 00 00 00 00 00
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# a0:
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# gdt_descriptor:
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17 00 # final index of gdt = gdt_end - gdt_start - 1
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80 7c 00 00 # start = gdt_start [label]
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# padding
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# a5:
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00 00 00 00 00 00 00 00 00 00
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# b0:
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# disk_error:
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# print 'D' to top-left of screen to indicate disk error
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# *0xb8000 <- 0x0f44
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# bx <- 0xb800
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bb 00 b8
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# ds <- bx
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8e db # 11b/mod 011b/reg/ds 011b/rm/bx
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# al <- 'D'
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b0 44
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# ah <- 0x0f # white on black
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b4 0f
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# bx <- 0
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bb 00 00
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# *ds:bx <- ax
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89 07 # 00b/mod/indirect 000b/reg/ax 111b/rm/bx
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e9 fb ff # loop forever
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# padding
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# c1:
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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## 32-bit code from this point (still some instructions not in SubX)
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# e0:
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# initialize_32bit_mode:
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66 b8 10 00 # ax <- offset 16 from gdt_start
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8e d8 # ds <- ax
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8e d0 # ss <- ax
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8e c0 # es <- ax
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8e e0 # fs <- ax
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8e e8 # gs <- ax
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# load interrupt handlers
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0f 01 1d # lidt 00/mod/indirect 011/subop 101/rm32/use-disp32
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f8 7d 00 00 # *idt_descriptor [label]
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# enable keyboard IRQ
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b0 fd # al <- 0xfd # enable just IRQ1
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e6 21 # port 0x21 <- al
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# initialization is done; enable interrupts
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fb
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e9 01 13 00 00 # jump to 0x9000 [label]
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# padding
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# ff:
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00
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# 100:
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# null interrupt handler:
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cf # iret
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# padding
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# 101:
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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# 110:
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# keyboard interrupt handler:
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# prologue
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fa # disable interrupts
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60 # push all registers to stack
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# acknowledge interrupt
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b0 20 # al <- 0x20
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e6 20 # port 0x20 <- al
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# read status into eax
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31 c0 # eax <- xor eax; 11/direct 000/r32/eax 000/rm32/eax
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e4 64 # al <- port 0x64
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# if (status & 0x1) == 0, return
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24 01 # al <- and 0x1
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3c 00 # compare al, 0
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74 35 # jump to epilogue if = [label]
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# 120:
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# if keyboard buffer is full, return
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31 c9 # ecx <- xor ecx; 11/direct 001/r32/ecx 001/rm32/ecx
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# . var index/ecx: byte
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8a # copy m8 at r32 to r8
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0d # 00/mod/indirect 001/r8/cl 101/rm32/use-disp32
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c8 7d 00 00 # disp32 [label]
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# . al = *(keyboard buffer + index)
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8a # copy m8 at r32 to r8
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81 # 10/mod/*+disp32 000/r8/al 001/rm32/ecx
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d0 7d 00 00 # disp32 [label]
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# . if (al != 0) return
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3c 00 # compare al, 0
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# 130:
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75 23 # jump to epilogue if != [label]
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# read keycode into al
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e4 60 # al <- port 0x60
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# if (al & 0x80) a key is being lifted; return
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50 # push eax
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24 80 # al <- and 0x80
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3c 00 # compare al, 0
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58 # pop to eax (without touching flags)
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75 19 # jump to epilogue if != [label]
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# 13c:
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# al <- *(keyboard normal map + eax)
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8a # copy m8 at rm32 to r8
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80 # 10/mod/*+disp32 000/r8/al 000/rm32/eax
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00 80 00 00 # disp32 [label]
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# store al in keyboard buffer
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88 # copy r8 to m8 at r32
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81 # 10/mod/*+disp32 000/r8/al 001/rm32/ecx
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d0 7d 00 00 # disp32 [label]
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# 148:
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# increment index
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fe # increment byte
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05 # 00/mod/indirect 000/subop/increment 101/rm32/use-disp32
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c8 7d 00 00 # disp32 [label]
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# clear top nibble of index (keyboard buffer is circular)
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80 # and byte
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25 # 00/mod/indirect 100/subop/and 101/rm32/use-disp32
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c8 7d 00 00 # disp32 [label]
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0f # imm8
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# 155:
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# epilogue
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61 # pop all registers
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fb # enable interrupts
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cf # iret
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# padding
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# 158:
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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# 1c8:
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# var keyboard circular buffer
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# write index: nibble
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# still take up 4 bytes so SubX can handle it
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00 00 00 00
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# 1cc:
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# read index: nibble
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# still take up 4 bytes so SubX can handle it
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00 00 00 00
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# 1d0:
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# circular buffer: byte[16]
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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# padding
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# 1e0:
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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# 1f8:
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# idt_descriptor:
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ff 00 # idt_end - idt_start - 1
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00 7e 00 00 # start = idt_start [label]
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# 1fe:
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# final 2 bytes of boot sector
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55 aa
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## sector 2
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# loaded by load_disk, not automatically on boot
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# offset 200 (address 0x7e00): interrupt descriptor table
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# 32 entries * 8 bytes each = 256 bytes (0x100)
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# idt_start:
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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# entry 8: clock
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00 7d # target[0:16] = null interrupt handler [label]
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08 00 # segment selector (gdt_code)
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00 # unused
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8e # 1/p 00/dpl 0 1110/type/32-bit-interrupt-gate
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00 00 # target[16:32]
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# entry 9: keyboard
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10 7d # target[0:16] = keyboard interrupt handler [label]
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08 00 # segment selector (gdt_code)
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00 # unused
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8e # 1/p 00/dpl 0 1110/type/32-bit-interrupt-gate
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00 00 # target[16:32]
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00
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# idt_end:
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# offset 300 (address 0x7f00):
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# video mode info:
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00 00 # attributes
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00 # winA
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00 # winB
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# 304
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00 00 # granularity
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00 00 # winsize
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# 308
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00 00 # segmentA
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00 00 # segmentB
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# 30c
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00 00 00 00 # realFctPtr (who knows)
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# 310
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00 00 # pitch
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00 00 # Xres
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# 314
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00 00 # Yres
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00 00 # Wchar Ychar
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# 318
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00 # planes
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00 # bpp
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00 # banks
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00 # memory_model
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# 31c
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00 # bank_size
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00 # image_pages
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00 # reserved
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# 31f
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00 00 # red_mask red_position
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00 00 # green_mask green_position
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00 00 # blue_mask blue_position
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00 00 # rsv_mask rsv_position
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00 # directcolor_attributes
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# 328
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00 00 00 00 # physbase <== linear frame buffer
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# 32c
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# reserved for video mode info
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00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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## the rest of this file has data
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# offset 400 (address 0x8000):
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# translating keys to ASCII {{{
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# keyboard normal map:
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00
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# es
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1b
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# |<--- digits -------------->| - = bs
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31 32 33 34 35 36 37 38 39 30 2d 3d 08
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# offset 40f
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# tb q w e r t y u i o p [ ]
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09 71 77 65 72 74 79 75 69 6f 70 5b 5d
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# offset 41c
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# enter
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0a 00
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# offset 41e
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# a s d f g h j k l ; ' ` \
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61 73 64 66 67 68 6a 6b 6c 3b 27 60 00 5c
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# offset 42c
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# z x c v b n m , . /
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7a 78 63 76 62 6e 6d 2c 2e 2f
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# offset 436
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00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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# 500:
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# keyboard shift map:
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
|
|
# 600:
|
|
# keyboard ctrl map:
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
|
|
# padding (there might be more keyboard tables)
|
|
# 700:
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
|
|
# 800:
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
# a00:
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
# }}}
|
|
|
|
# offset c00 (address 0x8800)
|
|
# Bitmaps for some ASCII characters (soon Unicode) {{{
|
|
# Part of GNU Unifont
|
|
# 8px wide, 16px tall
|
|
# Based on http://unifoundry.com/pub/unifont/unifont-13.0.05/font-builds/unifont-13.0.05.hex.gz
|
|
# See https://en.wikipedia.org/wiki/GNU_Unifont#The_.hex_font_format
|
|
# Website: http://unifoundry.com/unifont/index.html
|
|
# License: http://unifoundry.com/LICENSE.txt (GPL v2)
|
|
# Each line below is a bitmap for a single character.
|
|
# Each byte is a bitmap for a single row of 8 pixels.
|
|
|
|
# some unprintable ASCII chars
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
# 0x20 = space
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
# !
|
|
00 00 00 00 08 08 08 08 08 08 08 00 08 08 00 00
|
|
# "
|
|
00 00 22 22 22 22 00 00 00 00 00 00 00 00 00 00
|
|
# 0x23 = '#'
|
|
00 00 00 00 12 12 12 7e 24 24 7e 48 48 48 00 00
|
|
# $
|
|
00 00 00 00 08 3e 49 48 38 0e 09 49 3e 08 00 00
|
|
# %
|
|
00 00 00 00 31 4a 4a 34 08 08 16 29 29 46 00 00
|
|
# &
|
|
00 00 00 00 1c 22 22 14 18 29 45 42 46 39 00 00
|
|
# '
|
|
00 00 08 08 08 08 00 00 00 00 00 00 00 00 00 00
|
|
# (
|
|
00 00 00 04 08 08 10 10 10 10 10 10 08 08 04 00
|
|
# )
|
|
00 00 00 20 10 10 08 08 08 08 08 08 10 10 20 00
|
|
# *
|
|
00 00 00 00 00 00 08 49 2a 1c 2a 49 08 00 00 00
|
|
# +
|
|
00 00 00 00 00 00 08 08 08 7f 08 08 08 00 00 00
|
|
# ,
|
|
00 00 00 00 00 00 00 00 00 00 00 00 18 08 08 10
|
|
# -
|
|
00 00 00 00 00 00 00 00 00 3c 00 00 00 00 00 00
|
|
# .
|
|
00 00 00 00 00 00 00 00 00 00 00 00 18 18 00 00
|
|
# /
|
|
00 00 00 00 02 02 04 08 08 10 10 20 40 40 00 00
|
|
# 0x30 = '0'
|
|
00 00 00 00 18 24 42 46 4a 52 62 42 24 18 00 00
|
|
# 1
|
|
00 00 00 00 08 18 28 08 08 08 08 08 08 3e 00 00
|
|
# 2
|
|
00 00 00 00 3c 42 42 02 0c 10 20 40 40 7e 00 00
|
|
# 3
|
|
00 00 00 00 3c 42 42 02 1c 02 02 42 42 3c 00 00
|
|
# 4
|
|
00 00 00 00 04 0c 14 24 44 44 7e 04 04 04 00 00
|
|
# 5
|
|
00 00 00 00 7e 40 40 40 7c 02 02 02 42 3c 00 00
|
|
# 6
|
|
00 00 00 00 1c 20 40 40 7c 42 42 42 42 3c 00 00
|
|
# 7
|
|
00 00 00 00 7e 02 02 04 04 04 08 08 08 08 00 00
|
|
# 8
|
|
00 00 00 00 3c 42 42 42 3c 42 42 42 42 3c 00 00
|
|
# 9
|
|
00 00 00 00 3c 42 42 42 3e 02 02 02 04 38 00 00
|
|
# :
|
|
00 00 00 00 00 00 18 18 00 00 00 18 18 00 00 00
|
|
# ;
|
|
00 00 00 00 00 00 18 18 00 00 00 18 08 08 10 00
|
|
# <
|
|
00 00 00 00 00 02 04 08 10 20 10 08 04 02 00 00
|
|
# =
|
|
00 00 00 00 00 00 00 7e 00 00 00 7e 00 00 00 00
|
|
# >
|
|
00 00 00 00 00 40 20 10 08 04 08 10 20 40 00 00
|
|
# ?
|
|
00 00 00 00 3c 42 42 02 04 08 08 00 08 08 00 00
|
|
# 0x40 = @
|
|
00 00 00 00 1c 22 4a 56 52 52 52 4e 20 1e 00 00
|
|
# A
|
|
00 00 00 00 18 24 24 42 42 7e 42 42 42 42 00 00
|
|
# B
|
|
00 00 00 00 7c 42 42 42 7c 42 42 42 42 7c 00 00
|
|
# C
|
|
00 00 00 00 3c 42 42 40 40 40 40 42 42 3c 00 00
|
|
# D
|
|
00 00 00 00 78 44 42 42 42 42 42 42 44 78 00 00
|
|
# E
|
|
00 00 00 00 7e 40 40 40 7c 40 40 40 40 7e 00 00
|
|
# F
|
|
00 00 00 00 7e 40 40 40 7c 40 40 40 40 40 00 00
|
|
# G
|
|
00 00 00 00 3c 42 42 40 40 4e 42 42 46 3a 00 00
|
|
# H
|
|
00 00 00 00 42 42 42 42 7e 42 42 42 42 42 00 00
|
|
# I
|
|
00 00 00 00 3e 08 08 08 08 08 08 08 08 3e 00 00
|
|
# J
|
|
00 00 00 00 1f 04 04 04 04 04 04 44 44 38 00 00
|
|
# K
|
|
00 00 00 00 42 44 48 50 60 60 50 48 44 42 00 00
|
|
# L
|
|
00 00 00 00 40 40 40 40 40 40 40 40 40 7e 00 00
|
|
# M
|
|
00 00 00 00 42 42 66 66 5a 5a 42 42 42 42 00 00
|
|
# N
|
|
00 00 00 00 42 62 62 52 52 4a 4a 46 46 42 00 00
|
|
# O
|
|
00 00 00 00 3c 42 42 42 42 42 42 42 42 3c 00 00
|
|
# 0x50 = P
|
|
00 00 00 00 7c 42 42 42 7c 40 40 40 40 40 00 00
|
|
# Q
|
|
00 00 00 00 3c 42 42 42 42 42 42 5a 66 3c 03 00
|
|
# R
|
|
00 00 00 00 7c 42 42 42 7c 48 44 44 42 42 00 00
|
|
# S
|
|
00 00 00 00 3c 42 42 40 30 0c 02 42 42 3c 00 00
|
|
# T
|
|
00 00 00 00 7f 08 08 08 08 08 08 08 08 08 00 00
|
|
# U
|
|
00 00 00 00 42 42 42 42 42 42 42 42 42 3c 00 00
|
|
# V
|
|
00 00 00 00 41 41 41 22 22 22 14 14 08 08 00 00
|
|
# W
|
|
00 00 00 00 42 42 42 42 5a 5a 66 66 42 42 00 00
|
|
# X
|
|
00 00 00 00 42 42 24 24 18 18 24 24 42 42 00 00
|
|
# Y
|
|
00 00 00 00 41 41 22 22 14 08 08 08 08 08 00 00
|
|
# Z
|
|
00 00 00 00 7e 02 02 04 08 10 20 40 40 7e 00 00
|
|
# [
|
|
00 00 00 0e 08 08 08 08 08 08 08 08 08 08 0e 00
|
|
# \
|
|
00 00 00 00 40 40 20 10 10 08 08 04 02 02 00 00
|
|
# ]
|
|
00 00 00 70 10 10 10 10 10 10 10 10 10 10 70 00
|
|
# ^
|
|
00 00 18 24 42 00 00 00 00 00 00 00 00 00 00 00
|
|
# _
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 7f 00
|
|
# 0x60 = backtick
|
|
00 20 10 08 00 00 00 00 00 00 00 00 00 00 00 00
|
|
# a
|
|
00 00 00 00 00 00 3c 42 02 3e 42 42 46 3a 00 00
|
|
# b
|
|
00 00 00 40 40 40 5c 62 42 42 42 42 62 5c 00 00
|
|
# c
|
|
00 00 00 00 00 00 3c 42 40 40 40 40 42 3c 00 00
|
|
# d
|
|
00 00 00 02 02 02 3a 46 42 42 42 42 46 3a 00 00
|
|
# e
|
|
00 00 00 00 00 00 3c 42 42 7e 40 40 42 3c 00 00
|
|
# f
|
|
00 00 00 0c 10 10 10 7c 10 10 10 10 10 10 00 00
|
|
# g
|
|
00 00 00 00 00 02 3a 44 44 44 38 20 3c 42 42 3c
|
|
# h
|
|
00 00 00 40 40 40 5c 62 42 42 42 42 42 42 00 00
|
|
# i
|
|
00 00 00 08 08 00 18 08 08 08 08 08 08 3e 00 00
|
|
# j
|
|
00 00 00 04 04 00 0c 04 04 04 04 04 04 04 48 30
|
|
# k
|
|
00 00 00 40 40 40 44 48 50 60 50 48 44 42 00 00
|
|
# l
|
|
00 00 00 18 08 08 08 08 08 08 08 08 08 3e 00 00
|
|
# m
|
|
00 00 00 00 00 00 76 49 49 49 49 49 49 49 00 00
|
|
# n
|
|
00 00 00 00 00 00 5c 62 42 42 42 42 42 42 00 00
|
|
# o
|
|
00 00 00 00 00 00 3c 42 42 42 42 42 42 3c 00 00
|
|
# 0x70 = p
|
|
00 00 00 00 00 00 5c 62 42 42 42 42 62 5c 40 40
|
|
# q
|
|
00 00 00 00 00 00 3a 46 42 42 42 42 46 3a 02 02
|
|
# r
|
|
00 00 00 00 00 00 5c 62 42 40 40 40 40 40 00 00
|
|
# s
|
|
00 00 00 00 00 00 3c 42 40 30 0c 02 42 3c 00 00
|
|
# t
|
|
00 00 00 00 10 10 10 7c 10 10 10 10 10 0c 00 00
|
|
# u
|
|
00 00 00 00 00 00 42 42 42 42 42 42 46 3a 00 00
|
|
# v
|
|
00 00 00 00 00 00 42 42 42 24 24 24 18 18 00 00
|
|
# w
|
|
00 00 00 00 00 00 41 49 49 49 49 49 49 36 00 00
|
|
# x
|
|
00 00 00 00 00 00 42 42 24 18 18 24 42 42 00 00
|
|
# y
|
|
00 00 00 00 00 00 42 42 42 42 42 26 1a 02 02 3c
|
|
# z
|
|
00 00 00 00 00 00 7e 02 04 08 10 20 40 7e 00 00
|
|
# {
|
|
00 00 00 0c 10 10 08 08 10 20 10 08 08 10 10 0c
|
|
# |
|
|
00 00 08 08 08 08 08 08 08 08 08 08 08 08 08 08
|
|
# }
|
|
00 00 00 30 08 08 10 10 08 04 08 10 10 08 08 30
|
|
# ~
|
|
00 00 00 31 49 46 00 00 00 00 00 00 00 00 00 00
|
|
# 0x7f = del (unused)
|
|
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
|
|
# }}}
|
|
|
|
# offset 1400 (address 0x9000)
|
|
|
|
# vim:ft=subx
|