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32 lines
582 B
Plaintext
32 lines
582 B
Plaintext
// Routines from Commodore PET KERNAL ROM
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#if not(CBM_PET)
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#warn pet_kernal module should be only used on PET targets
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#endif
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// CHROUT. Write byte to default output. (If not screen, must call OPEN and CHKOUT beforehands.)
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// Input: A = Byte to write.
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asm void putchar(byte register(a) char) @$FFD2 extern
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inline void new_line() {
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putchar(13)
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}
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inline asm set_zero is_pet2000() {
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? LDA #$CA
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CMP $FFFB
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? RTS
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}
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inline asm set_zero is_pet3000() {
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? LDA #$FC
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CMP $FFFB
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? RTS
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}
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inline asm set_zero is_pet4000() {
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? LDA #$FD
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CMP $FFFB
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? RTS
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}
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