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Sprite Editor for Sprites Mode 2 (using OR color)

by albs_br on 26-12-2020, 03:57
Score: 167.15 %, Type: Forum topic , Comments: 27 comments
vector < int > > bitmap; for (int y = 0; y < 192; y++) { vector < int > line; for (int x = 0; x < 128; x++) { int value = in.get(); line.push_back(value >> 4); line.push_back(value & 0xF); } ...

More than 32 sprites on 9918/9938

by albs_br on 18-12-2020, 05:55
Score: 166.82 %, Type: Forum topic , Comments: 10 comments
Lately I'm playing with Gameboy development and found this cool trick: they put an interruption on a given screen line (mid screen for example) and then rewrite the sprite attributes table, so new sprites are writen on the bottom half of screen, ...

Gameboy development in Assembly, anyone?

by albs_br on 22-11-2020, 05:45
Score: 166.33 %, Type: Forum topic , Comments: 0 comments
Hi, in the last few days I got interested in Gameboy devlopment and made some small programs to getting used to the hardware. Is there someone here with experience on this subject? Any hints? A good online place (forum)? (Off-topic) ...

MSX SLT-Turbo - Cartridge to turn a 2+ into Turbo R

by albs_br on 07-11-2020, 16:32
Score: 166.14 %, Type: Forum topic , Comments: 9 comments
I saw it today on brazillian Whatsapp MSX group and want to share here: https://lars28.wordpress.com/2020/11/06/msx-slt-turbo-cartuc... Enjoy See also this forum thread. See also this forum thread. Cool! I haven't seen it. I Cool! I haven't seen it. I searched for "SLT turbo" but nothing. ...

Doubt about developing a 128kb MegaROM (ASCII 16K Mapper)

by albs_br on 02-11-2020, 13:48
Score: 165.86 %, Type: Forum topic , Comments: 12 comments
https://www.msx.org/wiki/Develop_a_program_in_cartridge_ROM#... And I'm curious with the "Seg_P8000_SW: equ 07000h", as the page 0 uses the addresses from 4000h to 7FFFh, should I to take care to not get over 7000h with my code/data in the page 0 ... to write on an address in the ROM? I mean, the entry point of the cartridge is 0x4000, so the page ...

Panasonic FS-A1WSX - My first MSX in 25 years

by albs_br on 09-10-2020, 02:33
Score: 165.39 %, Type: Forum topic , Comments: 12 comments
I created this topic to centralize my doubts about this machine. I'm not sure if its the right place. {mod: wrong place indeed. this is about hardware and not about selling/buying, so it's moved to the hardware forum} Panasonic FS-A1WSX: ...

Strategies for 1 pixel vertical scrolling on 9918 VDP (MSX 1)

by albs_br on 03-10-2020, 21:00
Score: 165.96 %, Type: Forum topic , Comments: 54 comments
only one implemented so far): https://youtu.be/y00nyaNN0jM Hi You're right. Strategy ... approach: Prepare the new CHRTBL in the first 128 characters (0-127) for the first bank The ... buffer using the first 128 characters (0-127) Blit the NAMTBL: the screen will be scrolled one px ...

Which of these is faster?

by albs_br on 20-09-2020, 17:48
Score: 164.99 %, Type: Forum topic , Comments: 27 comments
for MSX1) ;Input: HL = source address in RAM ; DE = destination address in VRAM (0-3FFFh) ; BC ... a,(VDP_DW) ;Incompatible under DOS. ld c,a inc c di out (c),e ;bits 0 to 7 of VRAM address ld a,d ... a,c or a jr z,copy_to_VDP_lsb_0 inc e copy_to_VDP_lsb_0: ld b,c ; get the VDP ...

Red Line 2 - Possible future racing game for MSX1

by albs_br on 07-09-2020, 21:04
Score: 164.75 %, Type: Forum topic , Comments: 16 comments
I made a small POC of a pseudo 3D racing game for MSX1 computers, inspired by Top Gear 2 for SNES. I took the idea from this thread . I have two name tables and alternate between them. The patterns are equal, only the colors differ. It's ...

Screen 2 using only one pattern table

by albs_br on 01-09-2020, 17:36
Score: 165.31 %, Type: Forum topic , Comments: 9 comments
on the VDP's VRAM address lookup, so setting them to 0 causes the mirroring effect. However, note ... 10 SCREEN1:WIDTH32 20 SCREEN2:POKE&HFCAF,1 30 VDP(3)=&H9F:VDP(4)=0 I am a bit ... ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ; defb 0x02 ; Reg# 0 000000[M3][EV] ; defb 0x62 ; Reg# 1 ...
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