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MSX and VRAM access speed: Is really so bad? what do you think?

by PingPong on 10-01-2022, 20:38
Score: 152.29 %, Type: Forum topic , Comments: 5 comments
write (not page 0 ) takes 3 cycles. So 3us. The same ballpark of a z80 in msx (you need also ... on average to be 2-3 cycles, so 0.5 to 1us leading to a LD a,(HL) requiring 9-10 t-states. - amstrad CPC ... in a operation like "OR 0x40". gdx wrote: And finally, the graphics commands are quite ...

New MSX1 MiSTer core (based on VG-8010)

by zadokallen on 10-01-2022, 20:30
Score: 152.22 %, Type: Forum topic , Comments: 1 comment
https://github.com/tdlabac/MSX1_MiSTer https://misterfpga.org/viewtopic.php?f=14&t=3903 It's still early days but the core is quite capable already. Can run .rom and .cas files. Feels a bit more like the real old school thing, ...

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

by albs_br on 10-01-2022, 19:21
Score: 152.29 %, 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 cartridge problem on Sony HB-75F

by Astuck on 10-01-2022, 06:54
Score: 152.3 %, Type: Forum topic , Comments: 13 comments
Hi, this is my first post here so hello everybody and happy new year 2022, I'm a newbie regarding MSX, I was more an ATARI ST guy until now. So my problem sits with a Sony Hit Bit HB-75F, MSX 1, it was given with 2 working cartridges ...
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