SLOT signals

By PereGR

Champion (262)

Аватар пользователя PereGR

31-10-2009, 22:38

Maybe it was explained before...
Anyone can explain me how msx works with RD,WR,SLTSL,MEMRQ,... signals.
Is there a timming?
Any good technical info URL? Or send it to me: msx at ginabreda dot com

Working in a cartridge design(idea)... just design, no prototype is made/scheduled.

TYA.

Regards,
Pere.

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By Eugeny_Brychkov

Paragon (1232)

Аватар пользователя Eugeny_Brychkov

04-11-2009, 10:30

Start with understanding that /RD, /WR and /MREQ are originating in the CPU - read signalling part of Z80 user's manual at Zilog's web site. /SLTSL signal is an output of MSX-engine logic, and you need understanding how memory is allocated and switched in 64KB space. For these purposes research for port A8, memory address FFFFh. If you are skilled in diagrams, I recommend closely revise schematic diagrams of PU-39 board in Sony 900P (manual is avaialble at msx.retro8bits.com).

I will be happy to help you in detail.

By PereGR

Champion (262)

Аватар пользователя PereGR

05-11-2009, 10:05

Thx. I'll check it.
LOL!