First post, by airs
Hello Vogons, I'm basing this build around the legendary Asus motherboard. Well, a conversion to it anyway! A big thank you to members that blazed this trail for us, including d0pefish and TheMobRules.
Components
Asus VL/I 486SV2G v2.0 - converted to X4
AMD 5x86 133MHz - ADZ variant
64MB RAM - FPM 60ns
1MB L2 cache - 10ns
Cirrus Logic GD5429 VLB videocard
Kouwell KW-559 VLB I/O controller
Creative Labs CT1740 ISA soundcard
SD to IDE adapter
512MB SD card
4X IDE CDROM
3.5" floppy
It all started when I stumbled across a decently priced 486SV2G on eBay. A few days later, it arrived (a bit dirty):
Measuring to order the correct parts from Digikey for the X4 conversion. Also note I preemptively removed the sticker covering "X4" 😈
Parts arrived from Digikey a few days later and I got to work. Almost done..
Finished the mod, but before trying a processor in it, I broke out the multimeter. Glad I did:
Turns out the guide I was following neglected to mention the need for JP31 to be closed. You can see it (now closed) just to the left of the newly added VRM.
Flashed the latest beta BIOS to a new EPROM
Came up on the first attempt - yay!
Some pics of the video and sound cards