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more powerful load-sectors

This commit is contained in:
Kartik K. Agaram 2021-07-16 08:58:15 -07:00
parent 96c217ab1c
commit d771fb6bab
3 changed files with 46 additions and 18 deletions
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43
510disk.mu Normal file
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@ -0,0 +1,43 @@
fn load-sectors disk: (addr disk), lba: int, n: int, out: (addr stream byte) {
var curr-lba/ebx: int <- copy lba
var remaining/edx: int <- copy n
{
compare remaining, 0
break-if-<=
# sectors = min(remaining, 0x100)
var sectors/eax: int <- copy remaining
compare sectors, 0x100
{
break-if-<=
sectors <- copy 0x100
}
#
read-ata-disk disk, curr-lba, sectors, out
#
remaining <- subtract sectors
curr-lba <- add sectors
loop
}
}
fn store-sectors disk: (addr disk), lba: int, n: int, in: (addr stream byte) {
var curr-lba/ebx: int <- copy lba
var remaining/edx: int <- copy n
{
compare remaining, 0
break-if-<=
# sectors = min(remaining, 0x100)
var sectors/eax: int <- copy remaining
compare sectors, 0x100
{
break-if-<=
sectors <- copy 0x100
}
#
write-ata-disk disk, curr-lba, sectors, in
#
remaining <- subtract sectors
curr-lba <- add sectors
loop
}
}

4
apps/ex9.mu
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@ -18,14 +18,14 @@
fn main screen: (addr screen), keyboard: (addr keyboard), data-disk: (addr disk) {
var text-storage: (stream byte 0x200)
var text/esi: (addr stream byte) <- address text-storage
read-ata-disk data-disk, 0/lba, 1/num-sectors, text
load-sectors data-disk, 0/lba, 1/num-sectors, text
var word-count/eax: int <- word-count text
var result-storage: (stream byte 0x10)
var result/edi: (addr stream byte) <- address result-storage
write-int32-decimal result, word-count
write-ata-disk data-disk, 0/lba, 1/num-sectors, result
store-sectors data-disk, 0/lba, 1/num-sectors, result
}
fn word-count in: (addr stream byte) -> _/eax: int {

17
apps/img.mu
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@ -36,22 +36,7 @@ fn load-image self: (addr image), data-disk: (addr disk) {
var s/ebx: (addr stream byte) <- address s-storage
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, "loading sectors from data disk", 3/fg, 0/bg
move-cursor-to-left-margin-of-next-line 0/screen
read-ata-disk data-disk, 0/lba, 0x100/sectors, s
read-ata-disk data-disk, 0x100/lba, 0x100/sectors, s
read-ata-disk data-disk, 0x200/lba, 0x100/sectors, s
read-ata-disk data-disk, 0x300/lba, 0x100/sectors, s
read-ata-disk data-disk, 0x400/lba, 0x100/sectors, s
read-ata-disk data-disk, 0x500/lba, 0x100/sectors, s
read-ata-disk data-disk, 0x600/lba, 0x100/sectors, s
read-ata-disk data-disk, 0x700/lba, 0x100/sectors, s
read-ata-disk data-disk, 0x800/lba, 0x100/sectors, s
read-ata-disk data-disk, 0x900/lba, 0x100/sectors, s
read-ata-disk data-disk, 0xa00/lba, 0x100/sectors, s
read-ata-disk data-disk, 0xb00/lba, 0x100/sectors, s
read-ata-disk data-disk, 0xc00/lba, 0x100/sectors, s
read-ata-disk data-disk, 0xd00/lba, 0x100/sectors, s
read-ata-disk data-disk, 0xe00/lba, 0x100/sectors, s
read-ata-disk data-disk, 0xf00/lba, 0x100/sectors, s
load-sectors data-disk, 0/lba, 0x1000/sectors, s
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, "parsing", 3/fg, 0/bg
move-cursor-to-left-margin-of-next-line 0/screen
initialize-image self, s