44 lines
1.4 KiB
Forth
44 lines
1.4 KiB
Forth
# Experimental Mu shell
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# A Lisp with indent-sensitivity and infix, no macros.
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fn main screen: (addr screen), keyboard: (addr keyboard), data-disk: (addr disk) {
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var globals-storage: global-table
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var globals/edi: (addr global-table) <- address globals-storage
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initialize-globals globals
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var sandbox-storage: sandbox
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var sandbox/esi: (addr sandbox) <- address sandbox-storage
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initialize-sandbox sandbox
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load-sandbox data-disk, sandbox
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{
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render-globals screen, globals, 0/x, 0/y, 0x40/xmax, 0x2f/screen-height-without-menu
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render-sandbox screen, sandbox, 0x40/x, 0/y, 0x80/screen-width, 0x2f/screen-height-without-menu, globals
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{
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var key/eax: byte <- read-key keyboard
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compare key, 0
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loop-if-=
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# no way to quit right now; just reboot
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edit-sandbox sandbox, key, globals, screen, keyboard, data-disk
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}
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loop
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}
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}
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# Read a null-terminated sequence of keys from disk and load them into
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# sandbox.
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fn load-sandbox data-disk: (addr disk), _self: (addr sandbox) {
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var self/esi: (addr sandbox) <- copy _self
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var s-storage: (stream byte 0x200)
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var s/ebx: (addr stream byte) <- address s-storage
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load-sector data-disk, 0/lba, s
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{
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var done?/eax: boolean <- stream-empty? s
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compare done?, 0/false
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break-if-!=
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var key/eax: byte <- read-byte s
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compare key, 0/null
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break-if-=
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edit-sandbox self, key, 0/no-globals, 0/no-screen, 0/no-keyboard, 0/no-disk
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loop
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}
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}
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