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51 lines
935 B
Plaintext
51 lines
935 B
Plaintext
// target-independent things
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#if not(ARCH_6809)
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#warn stdlib_6809 module should be only used on 6809-compatible targets
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#endif
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word nmi_routine_addr @$FFFC
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word reset_routine_addr @$FFFE
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word irq_routine_addr @$FFF8
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word swi_routine_addr @$FFFA
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word firq_routine_addr @$FFF6
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word swi2_routine_addr @$FFF4
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word swi3_routine_addr @$FFF2
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macro asm void poke(word const addr, byte register(b) value) {
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! STB addr
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}
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macro asm byte peek(word const addr) {
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! LDB addr
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}
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macro asm void disable_irq() {
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ORCC #$30
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}
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macro asm void enable_irq() {
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ANDCC #$CF
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}
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asm byte hi_nibble_to_hex(byte register(a) value) {
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LSRB
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LSRB
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LSRB
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LSRB
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? JMP lo_nibble_to_hex
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}
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asm byte lo_nibble_to_hex(byte register(a) value) {
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! ANDB #$F
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ADDB #$30
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CMPB #$3A
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BCC _lo_nibble_to_hex_lbl
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ADDB #$7 // carry is set
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_lo_nibble_to_hex_lbl:
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? RTS
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}
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macro asm void panic() {
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? JSR _panic
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} |