First post, by fodder128
I recently acquired a Dell 486D, but unfortunately, the CMOS battery had leaked extensively onto the motherboard, and the power supply was less than ideal. Upon inspecting the board, I replaced several capacitors that were pulling down the power supply voltage, preventing the Power Good (PG) signal from reaching 5V. These capacitors were mostly located near the leaked battery area around the VL82C332.
After further review of the address and data buses on the CMOS IC and the ISA expansion, I found that while the address bus appears to be functioning correctly, the data bus is not rising quickly enough and is exhibiting a "shark fin" pattern.
I was wondering if there is a diagram available for the VLSI VL82C332 IC, as the battery acid had also affected this component. I would like to confirm its signal behavior. As far as I know, this IC functions as a bus transceiver for the VLSI chipset trio.
