Canon V-30F MSX2

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By popolon_

Master (212)

popolon_'s picture

18-12-2021, 09:39

64kB vram addon now installed and working
P_20211218_103345_vHDR_Auto.jpg
P_20211218_102940_vHDR_Auto.jpg
P_20211218_103754_vHDR_Auto.jpg

By gdx

Enlighted (5368)

gdx's picture

18-12-2021, 10:15

Good job!

By gdx

Enlighted (5368)

gdx's picture

20-03-2022, 10:27

Popolon, can you enter the OUT255,1 instruction (without no cartridge inserted) and tell if it has any effect?

It is to know if there is really a memory mapper.

By popolon_

Master (212)

popolon_'s picture

21-03-2022, 21:22

I will try that command tomorrow. But anyway as there is place for additional ram in pcb, there has to be mapper.

By popolon_

Master (212)

popolon_'s picture

22-03-2022, 07:45

I gave that "out 255,1" command and the V30 rebooted.

By popolon_

Master (212)

popolon_'s picture

22-03-2022, 07:53

Commands
OUT &HFF,1 -> V30 hangs.
OUT &HFF,3 -> V30 hangs.

By gdx

Enlighted (5368)

gdx's picture

22-03-2022, 11:16

Thank you, so there is a memory mapper even with 64kB only.

I've also seen it can be upgraded to 128kB.
I think JP1 and JP2 are used to add the 64kB of RAM and JP4 and JP5 for ROMs, but it's need to be checked by following the tracks. Maybe you already know how to do it.
I saw that Canon also used ferrites in addition to 100nf capacitors for RAMs, which is rare.

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