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Calling BIOS routines from C without any overhead

by aoineko on 09-07-2022, 00:11
Score: 185.51 %, Type: Forum topic , Comments: 10 comments
nuc1e0n wrote: z88dk has nuc1e0n wrote: z88dk has konamiman's asmlib integrated ... or msxdos2: int isMSX2(void) { if(bdos(CPM_VERS, 0) == 0x22) { __asm ld a, 1 ld c, 0x6f call 0x0005 or a jr nz, NOTMSX2 ld a, b cp 2 jr c, NOTMSX2 ld hl, 1 ret ...

Fast copy using unrolled ldi loop

by aoineko on 06-07-2022, 01:28
Score: 185.2 %, Type: Forum topic , Comments: 20 comments
ld iy, #2 add iy, sp ld c, 0(iy) ld b, 1(iy) // ... and #0x0F // 8 cc jp z, mem_fastcopy_loop // 11 cc - total 24 cc ... 5 cc ld b, #0 // 8 cc ld c, a // 5 ...
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