Canon V-30F MSX2

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By mars2000you

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19-01-2015, 18:01

Do you have READ the V-30 article ?

By Manuel

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19-01-2015, 19:18

Aha: * (moved Canon V-30 to Canon V-30F)

Ok, that is the most sensible thing to do now.

By popolon_

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01-11-2021, 12:34

What is this Vram expansion port in my Canon V-30F? As that is not seen in wiki page pictures.
IMG_20211101_130155614.jpg

By gdx

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01-11-2021, 12:57

How many VRAMs does your Canon V-30F have?

It looks like a slot to put a VRAM cartridge. Maybe it's to extend VRAM to 192kB.

By popolon_

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01-11-2021, 13:26

The vram chips are on tricky place to see, but it seems in this machine there are two 41464 dram chips, so 64KB total. So that expansion is for adding that missing 64KB. So V30F has two different hw variants? Was that confirmed that V30F without this expansion slot at the back has really 128KB vram size?

By mars2000you

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01-11-2021, 13:32

Probably one of the rarest cases on MSX where this optional VRAM was used to store data (this VRAM can't indeed not be accessed directly, only VRAM/RAM and RAM/VRAM transfers are possible).

By mars2000you

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01-11-2021, 14:12

popolon_ wrote:

The vram chips are on tricky place to see, but it seems in this machine there are two 41464 dram chips, so 64KB total. So that expansion is for adding that missing 64KB. So V30F has two different hw variants? Was that confirmed that V30F without this expansion slot at the back has really 128KB vram size?

So it could also mean that the 'standard' V-30F would have only 64kB VRAM, just like the V-25. But 128kb VRAM is announced in front. Very confusing....

Besides, there's a picture on your Yahoo auction showing the boot screen with 128kB VRAM : https://page.auctions.yahoo.co.jp/jp/auction/c1012275987

By mars2000you

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01-11-2021, 14:02

I think the answer is in front of the machines: most machines announce 128kB VRAM, it's not the case of your Yahoo auction.

By popolon_

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01-11-2021, 14:37

Yes, there is no ram and no vram amount printed in front panel. Anyway it seems there is place to add 64KB main ram in main pcb.

By popolon_

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01-11-2021, 20:09

By the way, rtc clock battery is done with two AA batteries, that are in front panel
IMG_20211101_210552369.jpg

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