VOGONS


First post, by scroeffie

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hi i had this vga card for couple of weeks now never tested it but it wont show anything
i have cleaned it reseat all the chips added new ram ,changed jumpers looked online for dip switch settings fixed 1 broken trace
nothing wont boot
any tips ?

Trident TVGA8900B FCC ID: HNG2YPTVGA96X8TC2

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Reply 1 of 17, by weedeewee

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missing 40MHz oscillator !

also, what do you mean with no boot, no image output and computer beeps two or three times ?

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Reply 2 of 17, by scroeffie

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i have seen fotos online with same card but with the crystal but mine is pal or wont that matter ??
no beep from the speaker nothing on the screen i tested all the isa slots with other video cards and it works fine
changed jumpers and dipswitch settings from this site https://stason.org/TULARC/pc/graphics-cards/U … SUPER-8900.html

found this card on ebay from bulgaria and it has the crystal 40mhz https://www.ebay.com/itm/Trident-TVGA8900B-FC … 31800079?_ul=IL < same card as mine but mine has not the crystal very strange

Last edited by scroeffie on 2022-01-01, 17:56. Edited 1 time in total.

Reply 4 of 17, by scroeffie

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fgenesis wrote on 2022-01-01, 17:55:

I have this (or a very similar card) but no VGA bios chips... if possible, could you please dump those bios chips and upload the dump here? That would be great =)

i wil after i get it working 😀

Reply 6 of 17, by scroeffie

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weedeewee wrote on 2022-01-01, 18:16:

It looks like the crystal on your card was removed.

very strange all the cards on ebay have that crystal mine doesnt wierd ! wil order a crystal than ! and see what happens

Reply 9 of 17, by Tiido

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The card definitely has the oscillator cannibalized from it, there clearly was something in there and it has been desoldered. R2 looks to be removed too.

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Reply 10 of 17, by Disruptor

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scroeffie wrote on 2022-01-01, 18:40:

According to TH99 JP1 and JP2 are NOT sockets for DRAM modules
Instead you have to place some kind of jumper?

Setting JP1    JP2    J3
256KB Open Closed Pins 1 & 2, 4 & 5 closed
512KB Open Closed Pins 1 & 4, 2 & 5 closed
1MB Closed Open Pins 2 & 3, 5 & 6 closed

Note: The exact # of pins on JP1 & JP2 is unidentified by the manufacturer.

Reply 11 of 17, by scroeffie

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Disruptor wrote on 2022-01-01, 18:56:
According to TH99 JP1 and JP2 are NOT sockets for DRAM modules Instead you have to place some kind of jumper? […]
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scroeffie wrote on 2022-01-01, 18:40:

According to TH99 JP1 and JP2 are NOT sockets for DRAM modules
Instead you have to place some kind of jumper?

Setting JP1    JP2    J3
256KB Open Closed Pins 1 & 2, 4 & 5 closed
512KB Open Closed Pins 1 & 4, 2 & 5 closed
1MB Closed Open Pins 2 & 3, 5 & 6 closed

Note: The exact # of pins on JP1 & JP2 is unidentified by the manufacturer.

thats possible dont have that jumper 😀 so i need jumper a crystal and ... i could pun in time metal legs on those jp1 jp2 sockets and jump one connection the other !

Reply 13 of 17, by Anonymous Coward

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I wouldn't be so sure about that crystal being needed. Isn't the chip in U9 a clockgen? It might be that this card can be sold with either a clockgen or an oscillator.

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Reply 14 of 17, by Grzyb

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Anonymous Coward wrote on 2022-01-03, 13:50:

I wouldn't be so sure about that crystal being needed. Isn't the chip in U9 a clockgen? It might be that this card can be sold with either a clockgen or an oscillator.

This one - http://vgamuseum.info/images/palcal/trident/8 … 900b_top_hq.jpg - has both the TCK9001N and the OSC1.

Reply 15 of 17, by Anonymous Coward

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I just looked at the backside of the card. It does indeed look like someone screwed with it.

"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium

Reply 16 of 17, by scroeffie

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iam stil trying to get it to work nothing ! i added red jumper things any tips
i have added a crytal but not shure if it works came out of a parts bin ! wil order a new crystal

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Reply 17 of 17, by scroeffie

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I think the RAM I am using from AliExpress is fake! The computer beeps 3 times very fast, but still has a black screen. I have another of these cards but C revision, same thing - beeps 3 times fast.
Must be the fake RAM.