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Strange behaviour (bug?) on SPRATR base addr register on V9938/58

by albs_br on 10-01-2022, 19:21
Score: 177.45 %, Type: Forum topic , Comments: 6 comments
to 0x1fa00, the SPRCOL table won't work properly (it is supposed to bet automatically set 512 bytes ... repeated. This is how I set the registers: ; ---- set SPRATR to 0x1fa00 (SPRCOL is automatically set 512 bytes before SPRATR, so 0x1f800) ; bits: 16 14 7 ; | | | ...

MSX Wings, port of a famous 90's game/MSX 2+/SC11 (Demo/WIP/POC)

by albs_br on 16-01-2022, 04:34
Score: 179.77 %, Type: Forum topic , Comments: 76 comments
https://studio.youtube.com/video/mUgsNs8ixX0/edit correct link correct link https://www.youtube.com/watch?v=mUgsNs8ixX0 Thanks ...

Pletter (or other compression tools) performance

by albs_br on 21-07-2022, 22:22
Score: 184.99 %, Type: Forum topic , Comments: 23 comments
size, compression ratio and decompression speed. The best of them all was zx0 . Pletter was in 45th ... with zx0, though. Decompressing directly the image to VRAM is feasible, but not all tools are offering this possibility (specifically the code to do it). I know zx0 does, I've seen the VRAM version in GitHub. The ...

Doubt about SCREEN 7 image files (.s70 and .s71)

by albs_br on 03-08-2022, 17:01
Score: 184.02 %, Type: Forum topic , Comments: 13 comments
are supposed to be used? My naive understanding was that the first file (.s70) should be placed on page 0 (0x00000) and the second (.s71) on the page 1 (0x10000). Of course the 7 bytes header should be ignored. Is that correct? The VRAM on interlaced mode works this way? Even lines on page 0 and odd lines ...

MSX history in Japan compiled in one graph

by albs_br on 04-09-2022, 17:47
Score: 185.25 %, Type: Forum topic , Comments: 7 comments
https://hellotocky-msx.hatenablog.com/entry/2022/07/30/104031 It's in Japanese, but can be easily translated using Google Translator integrated ...

Assembly Z80, best way to divide by 16

by albs_br on 18-09-2022, 22:07
Score: 185.7 %, Type: Forum topic , Comments: 20 comments
pre-loaded (it also needs to be address aligned to 0x00 on low byte). Speed is more crucial here than ... Another method: ld hl,0D000h ld (hl),Value ; Put the value to divide by 16 at 0D000h xor a rld ... gdx wrote: Another method: ld hl,0D000h ld (hl),Value ; Put the value to divide by 16 ...

Create a 32 kb ROM in Assembly

by albs_br on 28-09-2022, 16:07
Score: 186.02 %, Type: Forum topic , Comments: 4 comments
Hi guys, I'm trying to create a ROM from 0x4000 to 0xbfff using the code available here ... RSLREG rrca rrca and 3 ;Keep bits corresponding to the page 4000h-7FFFh ld c,a ld b,0 ld hl,EXPTBL add hl,bc ld a,(hl) and 80h or c ld c,a inc hl inc hl inc hl inc hl ld a,(hl) and 0Ch or c ...

ayFX replayer, leaving a tiny sound after play a SFX

by albs_br on 29-09-2022, 18:42
Score: 186.04 %, Type: Forum topic , Comments: 4 comments
Hi guys, I have this problem as specified on title: after I call to play a sound FX using ayFX replayer it leaves a continuos tone playing on speaker, as if something wasn't ended correctly. Is there a tutorial with the steps required to setup ...

Books about retro development

by albs_br on 05-10-2022, 20:19
Score: 186.26 %, Type: Forum topic , Comments: 2 comments
I just compiled a list of all books about retro development I read on the last couple of years and I think it would be of interest of all people here: - Modern MSX BASIC Game Development (from Raul Portales) Books from 8bitworkshop.com: - ...

WebMSX - open ROM from local disk

by albs_br on 10-11-2022, 12:29
Score: 187.76 %, Type: Forum topic , Comments: 3 comments
Hi guys, that should be a silly question, but I did some search and yet not able to do this: https://webmsx.org/?ROM=c:\folder\file.ROM If the parameter is a url it works perfectly. Any idea? Maybe running WebMSX locally? ...
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