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faulty VOODOO2 with dots on textures

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First post, by bigral

Posted on 
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hello, i wanted real voodoo card for a long time and finally found one, but when i bought it I found it has faulty TMU or DRAM... 🙁 I bought it from this guy: https://youtu.be/Modg4uJZnVA?t=595 , here I specified time code of 9:55 where you may see BOX on the left side with vertical line of black dots. At https://youtu.be/Modg4uJZnVA?t=623 10:23 you may see running unreal with dots on the sky... Now situation even worse because I have even more dots and sometimes strange orange colors.

Is there some test program I can run to find out what dram may be faulty? or at least program that would use first TMU and show some textures and then second TMU, so I would know which TMU I should try to re-solder/replace?

Reply 2 of 4, by bigral

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now I have re-soldered TMU pins by applying flux and tin over old solder joint, nothing happened... still showing dots on textures and wrong colors in quake2

probably dead tmu or dram...

does anyone may write small program for DOS that would show texture with first TMU and then after click on space do same on second TMU? so I would at least know what chips to replace

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