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https://github.com/irmen/prog8.git
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51 lines
1.1 KiB
Lua
51 lines
1.1 KiB
Lua
%import c64lib
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%import c64utils
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%zeropage basicsafe
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main {
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sub start() {
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c64.VMCSB |= 2 ; switch to lowercase charset
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str s1 = "HELLO hello 1234 @[/]" ; regular strings have default encoding (petscii on c64)
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str s2 = @"HELLO hello 1234 @[/]" ; alternative encoding (screencodes on c64)
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c64scr.print("\n\n\n\nString output via print:\n")
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c64scr.print("petscii-str: ")
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c64scr.print(s1)
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c64scr.print("\nscrcode-str: ")
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c64scr.print(s2)
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c64scr.print("\n\nThe top two screen lines are set via screencodes.\n")
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ubyte i
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for i in 0 to len(s1)-1
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@($0400+i) = s1[i]
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for i in 0 to len(s2)-1
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@($0400+40+i) = s2[i]
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ubyte c1 = 'z'
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ubyte c2 = @'z'
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c64scr.print("\npetscii z=")
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c64scr.print_ub(c1)
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c64scr.print("\nscreencode z=")
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c64scr.print_ub(c2)
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c64scr.print("\n")
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check_eval_stack()
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}
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sub check_eval_stack() {
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if X!=255 {
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c64scr.print("stack x=")
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c64scr.print_ub(X)
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c64scr.print(" error!\n")
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}
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}
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}
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