First post, by Scottmm
Below is my collection of 486 Mb. I'm looking to build a 486dx133 . But each board has a bit of a issue when it comes to building with them.
The GEM? board seems to be the best (does boot DOS)
has EDO support, but will not max out on ram maxes out at 64mb not 128mb.
all4 ram banks work but if double sided ram is installed only 2 stick will be detected.
the manual is not 100% correct when following the jumper setting in the book diode D3 became a light emitting diode for a brief second and will no longer hold BIOS setting after power cycle.
The VIP board
does post and able to get get dos booted but no onboard IDE/Floppy. and VLB multi/IO cards are expensive plus wanted to overclock chip to 40mhz FSB and heard VLB is unstable at that speed.
The Luck Star (does boot DOS)
is only Rev:C1 so no EDO support and the CPU socket is too close to the PCI slot afraid it will short out with a CPU cooler installed also no clips to hold a cooler in place.
As a side note replaced the original Bios chip with an AT29C010A. The original chip's sticker was melted in the center and gave a odd post error. but was able to read the chip in a PROM reader and dump the file.(is the AT29C010A a good and long term replacement for the AT27C010).
The L569 board
is a unknown board looks like it may be a Biostar MB-8425UUC missing Keyboard controller and some IC are replaced with Resistors. board does not post has had previous repair attempt Dallas chip removed and socket installed. has a deep scratch next to Keyboard
The final board is a BIOSTAR MB-8433UUd-A VER:2 a very good board from what I've head.
but has come to me in a very unhealthy state. someone attempted to remove the Dallas but lifted several pads and traces. I would love to get this board up and running but I'm afraid I'll do more harm then good. trying to patch the traces.
