43 lines
1.2 KiB
Forth
43 lines
1.2 KiB
Forth
# Experimental Mu shell
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# A Lisp with indent-sensitivity and infix, no macros. Commas are ignored.
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fn main {
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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-from-secondary-disk sandbox
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var width/eax: int <- copy 0
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var height/ecx: int <- copy 0
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width, height <- screen-size 0/screen
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{
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render-sandbox 0/screen, sandbox, 2/x, 2/y, width, height
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{
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var key/eax: byte <- read-key 0/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
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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 secondary disk and load them
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# into sandbox.
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fn load-sandbox-from-secondary-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-string-from-primary-bus-secondary-drive 0/lbalo, 0/lbamid, 0/lbahi, 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
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loop
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}
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}
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