mirror of
https://github.com/hsoft/collapseos.git
synced 2024-11-24 02:08:06 +11:00
ae028e3a86
This huge refactoring remove the Seek and Tell routine from blockdev implementation requirements and change GetC and PutC's API so that they take an address to read and write (through HL/DE) at each call. The "PTR" approach in blockdev implementation was very redundant from device to device and it made more sense to generalize. It's possible that future device aren't "random access", but we'll be able to add more device types later. Another important change in this commit is that the "blockdev handle" is now opaque. Previously, consumers of the API would happily call routines directly from one of the 4 offsets. We can't do that any more. This makes the API more solid for future improvements. This change forced me to change a lot of things in fs, but overall, things are now simpler. No more `FS_PTR`: the "device handle" now holds the active pointer. Lots, lots of changes, but it also feels a lot cleaner and solid.
100 lines
1.1 KiB
NASM
100 lines
1.1 KiB
NASM
jp test
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#include "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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; *** subHL ***
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ld hl, 0x123
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ld a, 0x25
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call subHL
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ld a, h
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cp 0
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jp nz, fail
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ld a, l
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cp 0xfe
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jp nz, fail
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call nexttest
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ld hl, 0x125
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ld a, 0x23
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call subHL
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ld a, h
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cp 1
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jp nz, fail
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ld a, l
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cp 0x02
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jp nz, fail
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call nexttest
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ld hl, 0x125
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ld a, 0x25
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call subHL
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ld a, h
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cp 1
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jp nz, fail
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ld a, l
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cp 0
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jp nz, fail
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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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