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collapseos/tools/tests/unit/test_core.asm

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jp test
.inc "core.asm"
testNum: .db 1
test:
ld hl, 0xffff
ld sp, hl
; *** Just little z80 flags memo.
and a ; clear carry
ld hl, 100
ld de, 101
sbc hl, de
jp nc, fail ; carry is set
call nexttest
and a ; clear carry
ld hl, 101
ld de, 100
sbc hl, de
jp c, fail ; carry is reset
call nexttest
ld a, 1
dec a
jp m, fail ; positive
dec a
jp p, fail ; negative
call nexttest
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; *** subHL ***
ld hl, 0x123
ld a, 0x25
call subHL
ld a, h
cp 0
jp nz, fail
ld a, l
cp 0xfe
jp nz, fail
call nexttest
ld hl, 0x125
ld a, 0x23
call subHL
ld a, h
cp 1
jp nz, fail
ld a, l
cp 0x02
jp nz, fail
call nexttest
ld hl, 0x125
ld a, 0x25
call subHL
ld a, h
cp 1
jp nz, fail
ld a, l
cp 0
jp nz, fail
call nexttest
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; *** cpHLDE ***
ld hl, 0x42
ld de, 0x42
call cpHLDE
jp nz, fail
jp c, fail
call nexttest
ld de, 0x4242
call cpHLDE
jp z, fail
jp nc, fail
call nexttest
ld hl, 0x4243
call cpHLDE
jp z, fail
jp c, fail
call nexttest
; success
xor a
halt
nexttest:
ld a, (testNum)
inc a
ld (testNum), a
ret
fail:
ld a, (testNum)
halt