The same card however has serious damage on the other 3dfx ASIC.
One pin was broken off and a number of others so badly smashed that they just fall off
One pin was broken off and a number of others so badly smashed that they just fall off
Cold spray and hot air. I can reliably get it to crash by just getting near the middle row of DRAMs
I take that back. It is the DRAM. But which? I cannot bulk replace because this DRAM is obsolete and eBay has outrageous prices. 35ns is also too fast to just use sacrificial EDO sticks as a source since these are 80 or 70ns. 60ns top. I cannot test them with a small C program writing into the memory and reading back because portions are write only. And there are no THT SOJ40 sockets to be found. I could use the SMD sockets and then either make my own EDO sticks to use memtest86 on or I could use a blue pill stm32 board to build a crude tester