Caluser2000
Banned
Your card does appear to be an OPTi Local Bus card if compare the edge connectors to card in vwestlifes pic.interesting, obviously not the same layout as my card.
Your card does appear to be an OPTi Local Bus card if compare the edge connectors to card in vwestlifes pic.interesting, obviously not the same layout as my card.
Just an observation - but you found "433" stuck on it - this made me wonder if it shipped with a 33Mhz processor fitted.
Which raises the question - how does it know what clock cycle to use? Possibly a faster processor or even clearing the CMOS might help.
Just an idea.
433scl/64 - to me I'd guess that to be a 486SX-33 with 64KB cache.
my ET4000 doesn't say "local bus" anywhere on it. part of the issue seems to be there is so little info on OPTi bus or any of the little used proprietary buses. I mean, I found more information on how there's an alternate dimension where the Beetles never broke up then info on the OPTi bus. how fast is it? what kind of cards were made for it? the only information seems to be that it exists.
Sorry, I got confused with the second poster whipping out another VGA card. I checked the FCC ID. It doesn't state EISA or OLB, but it does at least let us know that your card is made by Chaintech. I found something on the Chaintech website (history section) saying they made a OPTi local bus motherboard in 1992. Since the two items came together, I guess there is a possibility the motherboard is Chaintech too. The quality seems pretty good at least.
on one of the local buses there is a sticker. sticker on expansion slot says "433scl/64k 01177330"
There was a card that came in the same box as this board. I assumed it was EISA but it may go with this board.
it has the same style sticker on the back of the card as the one on the motherboard though that may just be for store inventory or something. though they both have 5062 on the sticker
I tried removing the l2 cache. I also tested the CL isa video card I was using to make sure it was good, it is.
I filled bank 0 with 4 512kb 30 pin RAM chips. I no longer get the 3 beeps error but still no post, just a black screen. maybe the RAM isnt large enough and I need to dig up 4x1mb simms? or the board may be dead. I swapped CPU's with another 25mhz 486sx I had just to be sure and same effect.
*on top of VGA card "03310201-5303 made in taiwan"
I propose the model name 433SCL represents: (4)86 (33)MHZ, (S)iS chipset, (C)ache, (L)ocal Bus. Chaintech has other bards that follow similar naming convention, like 486UCL, which uses a "USAI" chipset. It doesn't really help us with the missing jumper settings and manual problem though. I guess your board is just rare enough that TH99 never had one pass through their hands.
I wouldn't be so concerned about the 25MHz oscillator. It all depends on how the motherboard is setup. For example, the 486 boards I have always want a 50MHz oscillator for running a 486DX-50. There is usually a jumper on most boards that use a a CPU oscillator to set either a 1:1 or 1:2 ratio.
Also any idea what the "cpu upgrade" socket is for.