First post, by kanecvr
- Rank
- Oldbie
Helo fellow retro hardware enthusiasts!
Today I got a haul of socket 3 and 386 motherboards, among witch I spotted a UMC based Biostar MB8433uud-a. All boards are rescued from a recycling center where they were going to be scrapped, and they were piled on top of each other outside in the open, so it wasn't in the best of shape. Besides the plethora of bent pins and part of a IDE cable stuck in one of the IDE connectors, the board had two electrolytic capacitors (10v 100uf) severely damaged and partly sheered off, one of the ISA slots is chipped, and it was covered in what can only be described as mud.
After a thorough cleaning, pin straightening and capacitor replacing, I got the board to POST. Now here's the problem: I can't seem to be able to locate a full manual for it - only jumper settings for different CPUs. The ODIN RTC's batery is dead - not even 0.1 volts - and the motherboard won't store any BIOS settings, making it impossible to boot of a HDD drive using the on board IDE controller (default setting is NONE instead of AUTO). Also, a curious fact is that it has a PS/2 port right under the DIN connector for the AT keyboard. Now I have no ideea if that's for a PS/2 keayboard or PS/2 mouse - the latter being most likely since the DIN connector and the PS/2 don't seem to share any traces apart from VCC and GND. The board also has a 5-pin connector that hasn't been solderede on - JP4 - witch I can only assume is also a PS/2 connector - either for KB or mouse.
Now to the questions:
- does anyone have a complete manual for this thing?
- can I connect an external 3V battery to it? I don't have a 4.6v battery nor do I want to look for and buy one.
- is JP42 the external battery connector? And if so, where do I stick the leads to a 3V battery?
- is the PS/2 port soldered under the AT Keypoard port for a PS/2 keyboard?
- was JP4 supposed to have a PS/2 mouse header on it? And if so, will a PS/2 mouse work if I just solder pins on? And if so, what pin arrangement does it use? Is it the classic Data/NC/GND/VCC/Clock?
Pics incoming.