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Anonymous Coward
Joined: 20 Nov 2004
Posts: 589
Location: Shandong, China
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Fri Jul 27, 2007 8:57 am |
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I have been wanting one of these damn modules for quite some time now, but I'm sure everybody knows that they are next to impossible to find. However, it is not impossible to find a PCI version of the Mach64GX with the module. Infact, I bought one hoping I could take the upgrade from the PCI card to use on my ISA and VLB versions. The memory chips seem to match, and the connectors seem to match....but the damn thing doesn't work.
When I boot the machine and adjust the driver to something like 1024x768 at 24bit colour depth, all but the lower right corner of the screen is readable. 1/4 of the screen is scrambled. After having a good look I see that each ATi card requests a specific Part number for the upgrade module. The ISA and PCI versions don't match. I am under the impression that ATi somehow did this on purpose so people would have to pay a premium to upgrade the older cards.
I believe that it may be possible to rewire the PCI upgrade part to function properly on a VLB or ISA card. However, I do not have one of these modules for comparison. Is there anyone in the forum that has one that is willing to make some high resolution scans for me? |
Last edited by Anonymous Coward on Sun Jul 29, 2007 4:06 am; edited 1 time in total |
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386er
Joined: 27 Jan 2007
Posts: 274
Location: USA
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Fri Jul 27, 2007 6:54 pm |
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hey, funny story, i got an ati mach 64 from work with 4mb vram ISA. my boss had like 10 video card that he trough out that had problems, this one was not seat properly in our test computer and was working fine. this little isa card can do 1240x1024x24bit. if you want i mabey able to send some hi res pic for you |
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Anonymous Coward
Joined: 20 Nov 2004
Posts: 589
Location: Shandong, China
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Sat Jul 28, 2007 2:38 am |
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It would be really great if you could do that. I don't need pictures of the whole card, just the front and back of the module so that I can see all the traces. |
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386er
Joined: 27 Jan 2007
Posts: 274
Location: USA
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Sat Jul 28, 2007 3:41 am |
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sure, when i have time, i'll take it out of this computer and scan it. |
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Unknown_K
Joined: 22 Apr 2007
Posts: 264
Location: Ohio/USA
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Sat Jul 28, 2007 6:32 am |
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Are the chips the same voltage and timing on both the isa/vlb and pci cards? |
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Anonymous Coward
Joined: 20 Nov 2004
Posts: 589
Location: Shandong, China
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Sat Jul 28, 2007 9:29 am |
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It's been a while since I compared the chips on my PCI module to my ISA/VLB cards...but I was pretty sure they were identical. Anyway, I'll compare this ISA module to my PCI version trace by trace, and if it only takes a small modification to try out my theory I'll go for it. If not, I'll consider whipping up my own home brew upgrade.
Anyway, I am under the impression that with other manufacturers the upgrade modules are interchangable to various bus versions in the same product family. The Diamond Stealth64 Video family comes to mind. |
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386er
Joined: 27 Jan 2007
Posts: 274
Location: USA
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Sun Jul 29, 2007 4:11 am |
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i now have time to do the scans, i hope to send them to you soon |
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Anonymous Coward
Joined: 20 Nov 2004
Posts: 589
Location: Shandong, China
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Sun Jul 29, 2007 4:19 am |
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That's great! My email is misterzeropage AT gmail.com |
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386er
Joined: 27 Jan 2007
Posts: 274
Location: USA
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Sun Jul 29, 2007 6:10 am |
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check you email  |
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