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Do you always use di/ei for VDP access ?

by Metalion on 06-01-2020, 13:41
Score: 153.18 %, Type: Forum topic , Comments: 9 comments
Hi everyone, Do you use di/ei for every case of VDP access ? It seems to me it can be avoided when it's a port where ISR will not access. For example, loading the palette colors on the V9938: ld hl,palette ld bc,16*2:9Ah xor a ...

ASCII 8 mapper does not work

by Metalion on 05-01-2020, 18:15
Score: 153.16 %, Type: Forum topic , Comments: 9 comments
at the beginning to facilitate the automatic recognition : ld a,0 ld (6000h),a ld a,1 ld (6800h),a ld a,2 ... call 138h [2] rrca and 03h ld c,a ld hl,0FCC1h add a,l ld l,a ld a,(hl) and 80h or c ld c,a [4] inc l ld a,(hl) and 0Ch or c ld h,80h jp 24h What I do not understand, is that it works ...

[WTB] TMTLogic GFX-Nine / Tecnobytes PowerGraph Light

by Metalion on 05-01-2020, 16:21
Score: 153.02 %, Type: Forum topic , Comments: 1 comment
Hello, As the title says, I'm searching for a V9990 extension. Either a TMTLogic GFX-Nine or a Tecnobytes Powergraph Light . Thanks. Technobytes are running a Technobytes are running a pre-order on a new batch, in case ...

Setting up a command on V9990

by Metalion on 01-01-2020, 14:26
Score: 153.05 %, Type: Forum topic , Comments: 8 comments
do_command test word 0,0,32,32,64,64,0,0FFh,6666h,6666h byte 20h do_command ld a,32 out (reg_select),a ... debuggable from the openMSX console with: debug read Sunrise\ GFX9000\ regs [n] Where [n] is 0 ... with the stand corrected, with the debugger version I have also the high regs always show 0, perhaps a bug indeed ...
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