SVI-738 VRAM upgrade

By protek

Expert (116)

protek's picture

25-11-2021, 20:55

If I upgrade the VRAM to full 128 kB, should the 738 still boot and run with the original ROM?

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By Manuel

Ascended (18246)

Manuel's picture

25-11-2021, 21:26

What do you mean with 'full 128kB'? Do you implement an MSX Memory Mapper?

By djh1697

Paragon (1606)

djh1697's picture

25-11-2021, 22:14

Why upgrade to 128k VRAM and use the original ROM's? There will be no benefit?

By djh1697

Paragon (1606)

djh1697's picture

25-11-2021, 22:14

Why upgrade to 128k VRAM and use the original ROM's? There will be no benefit?

By protek

Expert (116)

protek's picture

26-11-2021, 06:10

Manuel wrote:

What do you mean with 'full 128kB'? Do you implement an MSX Memory Mapper?

4 x 4464. That’s 128 kB, right?

I’ll update the ROMs too eventually, but I’ve got the VRAM chips ready.

By sdsnatcher73

Prophet (2337)

sdsnatcher73's picture

26-11-2021, 06:32

Yes of course it will still boot, it will only use 16kB of VRAM.