Reply 20 of 20, by CoffeeOne
Intel486dx33 wrote on 2024-02-04, 10:07:CoffeeOne wrote on 2024-02-03, 23:04:You put the wrong RAMs into those sockets, it should be FPM not EDO. But it does not matter obviously. So you can test by yourse […]
Intel486dx33 wrote on 2024-02-03, 20:30:I can watch a Video CD Movie on my 486 computer with CL-5429 VLB video card with 2mb ram I have a 486dx4-100 CPU with 16mb of 30 […]
I can watch a Video CD Movie on my 486 computer with CL-5429 VLB video card with 2mb ram
I have a 486dx4-100 CPU with 16mb of 30-pin Parity RAM
8x CDROMMovie playback is Very Good. NOT Choppy.
You put the wrong RAMs into those sockets, it should be FPM not EDO. But it does not matter obviously.
So you can test by yourself, if you are interested:
Remove those upgrade RAMs and then test again. Whatever.
"Movie playback is Very Good. NOT Choppy." It will be 100% the same with our without the additional megabyte.
EDIT:
Nevertheless you seem to have one of the best 542x cards that exist:
5429 chip and 45ns RAM.Well that card does recognize 2mb and it works fine. I looked up the specs on this DRAM chip and it will work fine.
I know the chip reads 100mhz but it can accelerate faster.
I only wanted to point out, that the 2nd MB on your card most likely is not used.
The only 2 modes that use 2 MB on Cirrus 5429 based cards is 1280x1024 256 colours interlaced and 1024x768 64000 colours interlaced.
My assumption was that you did not set the resolution to one of these two.
So the only change you will see, that utilities show graphics memory of 2MB and the startup screen shows 2MB.
I am not sure, if I interpret the datasheet correctly, but the Cirrus 5429 actually really might support EDO RAM.
But sorry "but it can accelerate faster": No way.
But don't take it personally, and enjoy your graphics card as it is!
I uploaded the specification of the Cirrus 542x chipset family here, I am sure it was already uploaded to Vogons a gazillion of times, but I could not find it 🙁