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72 lines
1.7 KiB
Plaintext
72 lines
1.7 KiB
Plaintext
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; source IL file
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; these are comments
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output prg,sys ; create a c-64 program with basic SYS call to launch it
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clobberzp restore ; clobber over the zp memory normally used by basic/kernel rom, frees up more zp
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~main
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{
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memory borderb1 = $d020
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memory .byte borderb2 = $d020
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memory .word screencolors = $d020
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memory .array($10) screenblock1 = $0400 ; 10 bytes
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memory .array($0100) screenblock2 = $0500 ; 256 bytes
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memory .array($0234) screenblock3 = $2000 ; some weird size
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memory .wordarray($20) screenblock4 = $0600 ; 32 words
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memory .matrix(40,25) charscreen = $0400
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var .array($10) var1 = $aa
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var .wordarray($10) var2 = $9988
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var .array($10) var3 = $11
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var var4
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var .matrix(40,25) vcharscreen ; init with 0
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var .matrix(40,25) vcharscreen2 = 111 ; init with 111
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start
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; set some colors
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Y = 0
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borderb1 = Y
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X=Y=A = 0
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X = 1
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screencolors = X
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borderb1 = 0
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borderb2 = 1
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screencolors = $0
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screencolors = $0207
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; fill block of memory with a single value (byte or word)
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;screenblock1,* = A
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;screenblock1,* = X
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;screenblock1,* = Y
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;screenblock1,* = 2
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;screenblock1,* = $aaa
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;screenblock2,* = A
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;screenblock2,* = X
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;screenblock2,* = Y
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;screenblock2,* = 2
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;screenblock2,* = $aaa
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;screenblock3,* = A
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;screenblock3,* = X
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;screenblock3,* = Y
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;screenblock3,* = 2
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;screenblock3,* = $aaa
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;screenblock4,* = A
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;screenblock4,* = X
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;screenblock4,* = Y
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;screenblock4,* = 2
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;screenblock4,* = $aaa
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; swap bytes
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;A = var1[0]
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;X = var1[1]
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;var1[0] = X
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;var1[1] = A
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; swap words
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;A = var2[0] ; must crash, cannot put word in register
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;X = var2[1] ;crash
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;var2[0] = X ; ok, 00-padded
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;var2[1] = A ; ok, 00-padded
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return
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}
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