Graphics card identification

[mcs_5]

I have two graphics card of unknown origin... One is MDA compatible, but I guess Hercules as well. The other is a CGA clone.

Monochrome first:



There isn't much text on the card. There is this bit:



M.T.C., a date code and a bit of Asian text. Japanese - according to my boyfriend...

All the 74xx ICs are Japanese at least



The card also has a part number on the backside:



PN741221

It has 64kB RAM, like a Hercules card should have I believe. But there's also a 6116 (2kB) SRAM. What's that for?



I have no idea where this card came from. Anybody recognize it?

 

[mcs_5]

The CGA card - with dual RCA outputs...



It seems to be a RK5-CG board.




Or a COLOR GRAPHIC BD-1



The back side has a logo. But that could just be the PCB manufacturer.



Here's the dual RCA output stage:



The board looks hand-drawn. With nice curvy traces - and slightly questionable soldering



I tested this board using a 5" portable TV, to get that Osborne experience



Both RCA outputs work, but I can't see a difference on the B/W TV.

I got this board from Bulgaria. No idea where it originally came from. Any ideas?

 

[modem7]

I got this board from Bulgaria. No idea where it originally came from. Any ideas?

A Bulgarian factory ?

 

[mcs_5]

A Bulgarian factory ?

They made all the chips for this board in Eastern Europe - so I think a Bulgarian factory would have used those

But I guess a lot of western "junk" got shipped east in the early 90s...

 

[SunSpotter]

Does Bowten mean anything to anyone? That's what Google translated the Japanese text as. Seemed kind of like a dead end when I tried searching for it, but if anyone wants to have a go at it themselves, here is the actual text: ボウテン

 

[mcs_5]

I've tried Google translate on Japanese websites before, and gotten mostly nonsense. I guess you need a Japanese-speaking person to make sense of most of it