First post, by esnaff
Hello everyone.
I have Abit PB4 rev 1.3 motherboard (ALi M1487/1489 chipset) with AMD's Am5x86-P75 cpu and 2x16mb edo ram. Right now the vga card is based on Tridents 9000i chip with 512kb ram on ISA 16bit slot. I tried to replace this card with PCI graphic card (tried both S3 Trio64V+ and S3 VirgeDX) but to no avail. PCI slots are 5V keyed as well as the cards themselves. I also tried a LAN card but none of them ever come up in the device manager inside Win95 OSR2 or on the boot screen during startup (hw info page that shows up before OS loads) I figured that the motherboard would't make to much of trouble regarding PCI bus since the bus runs on 33MHz and the cpu is set-up at 5x33MHz ...
Is there any workaround for this? I've seen PB4 boards running with PCI graphics on the net, could it be that the cpu is causing the problems? Would underclocking the bus solve the problems?