The cache only works for GUI acceleration and improves performance by about 15%, depending on resolution.

DOS is not constrained by the video memory bandwidth and thus there is no improvement.

mpe wrote on 2021-04-08, 19:57:

The cache only works for GUI acceleration and improves performance by about 15%, depending on resolution.

DOS is not constrained by the video memory bandwidth and thus there is no improvement.

OK, thank you much.

I got myself one of these too. But I'm unsure what kind of RAM to get to bring it to 2MB - what should I be looking for? I have a Cirrus card with similar sockets and I suspect the ram is the same; am I right?

I think I can figure out the xram part. Just hope the OS/2 driver is accelerated. The Cirrus 5428 is absolute rubbish. It can't even do NI at 1024x768. What's the odds this one can?

/Eirik

ltning wrote on 2021-07-09, 23:29:

I got myself one of these too. But I'm unsure what kind of RAM to get to bring it to 2MB - what should I be looking for? I have a Cirrus card with similar sockets and I suspect the ram is the same; am I right?

I think that if the Cirrus card has similar socket, the RAM chips will be good. I have never find incompatibility with SOJ video memory chips. Important! Pay attention to the right direction!

ltning wrote on 2021-07-09, 23:29:

I think I can figure out the xram part. Just hope the OS/2 driver is accelerated. The Cirrus 5428 is absolute rubbish. It can't even do NI at 1024x768. What's the odds this one can?

/Eirik

We like the Cirrus 5428 not because high resolution GUI capabilities but because is's best old DOS (VGA/SVGA pre VBE 2.0) game compatibility: https://gona.mactar.hu/DOS_TESTS_VLB/

Both have decent compatibility, but 542x series were just slow budget chips targeted at OEM and had no real benefit from 2 Mb of video RAM, due to crappy DAC. F64300 is similar to ET4000/W32i.

Gona wrote on 2021-07-10, 07:20:

ltning wrote on 2021-07-09, 23:29:

I got myself one of these too. But I'm unsure what kind of RAM to get to bring it to 2MB - what should I be looking for? I have a Cirrus card with similar sockets and I suspect the ram is the same; am I right?

I think that if the Cirrus card has similar socket, the RAM chips will be good. I have never find incompatibility with SOJ video memory chips. Important! Pay attention to the right direction!

If I am to buy more such chips, what specifically should I be looking for? Socket types, organization, etc.? I'm not terribly well versed in component puchasing - which I now realise is kinda embarrassing since I've been working with PC hardware since the mid-80s. I've probably also wasted a lot of money on components I'll never need ;)

Thanks for your help.

/Eirik

ltning wrote on 2021-07-10, 10:06:

If I am to buy more such chips, what specifically should I be looking for? Socket types, organization, etc.? I'm not terribly we […]
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Gona wrote on 2021-07-10, 07:20:

ltning wrote on 2021-07-09, 23:29:

I got myself one of these too. But I'm unsure what kind of RAM to get to bring it to 2MB - what should I be looking for? I have a Cirrus card with similar sockets and I suspect the ram is the same; am I right?

I think that if the Cirrus card has similar socket, the RAM chips will be good. I have never find incompatibility with SOJ video memory chips. Important! Pay attention to the right direction!

If I am to buy more such chips, what specifically should I be looking for? Socket types, organization, etc.? I'm not terribly well versed in component puchasing - which I now realise is kinda embarrassing since I've been working with PC hardware since the mid-80s. I've probably also wasted a lot of money on components I'll never need 😉

Thanks for your help.

/Eirik

I don't really known. I think most VLB videocards with 40 pin SOJ sockets are using 256k × 16 FPM memory chips, few latest VLB cards use EDO chips (I only have 2 of these and both have PCB moduls for memory upgrade not 40 pin SOJ sockets). if I wanted to expand memory one of my card, I would seek the data about the onboard SOJ-40 chips (if exist).

I recently tried this card this weekend and failed to get it to post with a U5S at 33MHz 0WS. At 1WS it is as fast as a CL-GD5428 at 0WS.

My F64300 works fine on my U5S-33MHz in zero waitstate. Guess it depends on the motherboard and card quality or something.

stalk3r wrote on 2019-04-18, 08:46:

according to the manual, sports a video cache called XRAM:

Do you still have the manual? Could you share? I have the same (or similar) card.

I think i lost the Win3.1 driver for this card. Anyone have it handy ?
Brief search online returns nothing.

Here you go