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WTB: Tseng Diamond Speedstar (ISA) or Diamond Speedstar 24X (ISA)
- Thread starter barney
- Start date
Chromedome45
Veteran Member
Is that based on the Tseng ET-4000 chip? I might have one. One of the faster ISA cards made. Also does 8 bit. Now if I can remember where I put it.
Chromedome45
Veteran Member
The Diamond speedstar with the Tseng 4000. I'll PM my price to you.
I think I have a Speedstar 24x, if you're looking for both and not just one of the two cards.
*looks*
Not finding that, but I do have a WD90C31 card that is by Western Digital itself. If you are interested in that, PM with an offer.
I do have a single ET4000 card, but it's not Diamond and I'm not parting with it anyway. xD
*looks*
Not finding that, but I do have a WD90C31 card that is by Western Digital itself. If you are interested in that, PM with an offer.
I do have a single ET4000 card, but it's not Diamond and I'm not parting with it anyway. xD
I am definitely interrested in the Diamond Speedstar 24X (Western Digital chipset) if you have it. PM me the price.
What model is the other one with the WD90c31 chipset you mentioned, and how much?
Thanks.
Chromedome45
Veteran Member
Tseng will blow the WD out of the water in far as performance. And it's CGA resgister compatible. Your loss.
I havn't forgotten about you Chromedome45, I'm still interested in your Diamond Speedstar. One thing, does it have 1MB?
Check your PM, I just sent you a price, tell me what you think.
eeguru
Veteran Member
As far as ISA video cards go, what actually makes one faster than the other? There isn't any active acceleration aside for maybe some blit/fill in an OS2/W31 driver. For DOS and DOS games, they are all writing to a raw frame buffer that is getting clocked out to a DAC. Assuming later cards are all 16-bit zero wait ISA access, shouldn't they all run the same speed?
dorkbert
Veteran Member
eeguru
Veteran Member
That says 'it was accelerated'. It doesn't elaborate how. It specifically mentions host acceleration; and by that I assume they mean the ISA bus interface. The fastest you can go over 16-bit ISA is to pre-assert the 16 bit selects with the ZWS strobe and not add any peripheral waits - completing the bus cycle in 3 clocks. If all 16-bit ISA cards do that, what else could possible set them apart on speed? Of course memory arbitration and access speed, line cache FIFO presence and size, and some other factors could cause waits. I'm just looking for detail as I have this really crazy project in mind to build an ISA video card w/ up-scaling and HDMI/DVI output.
Chromedome45
Veteran Member
The main reason I brought speed was I did a quick test on some ISA VGA cards a while back. I noticed that the Tseng was faster than a Trident, a Cirrus logic and an ATi Mach 8. This was using a program called SST. And it was just checking redraw speed as far as I can tell.