7cf3ed38da
Most of register fiddling routines (which is now the only thing contained in care.asm) are used by almost all userspace apps, often in inner loops. That makes the penalty of using jump tables for those a bit too high. Moreover, it burdens jump tables needlessly. Because this unit is very small (now that string routines are out), it makes sense to always include it in binaries.
66 lines
749 B
NASM
66 lines
749 B
NASM
jp test
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.inc "core.asm"
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testNum: .db 1
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test:
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ld hl, 0xffff
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ld sp, hl
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; *** Just little z80 flags memo.
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and a ; clear carry
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ld hl, 100
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ld de, 101
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sbc hl, de
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jp nc, fail ; carry is set
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call nexttest
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and a ; clear carry
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ld hl, 101
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ld de, 100
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sbc hl, de
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jp c, fail ; carry is reset
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call nexttest
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ld a, 1
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dec a
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jp m, fail ; positive
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dec a
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jp p, fail ; negative
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call nexttest
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; *** cpHLDE ***
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ld hl, 0x42
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ld de, 0x42
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call cpHLDE
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jp nz, fail
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jp c, fail
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call nexttest
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ld de, 0x4242
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call cpHLDE
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jp z, fail
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jp nc, fail
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call nexttest
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ld hl, 0x4243
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call cpHLDE
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jp z, fail
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jp c, fail
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call nexttest
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; success
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xor a
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halt
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nexttest:
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ld a, (testNum)
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inc a
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ld (testNum), a
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ret
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fail:
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ld a, (testNum)
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halt
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