So I just received the Pacific Computers Portable PCIII that I ordered.

The system takes a baby AT motherboard but there are only 4 slots available due to the original PSU taking up too much space.

The motherboard is currently a SIS based ISA/VLB board with a 486DX-50 CPU.

Somebody obviously replaced the motherboard in this thing at some point.

The VLB slots cannot be used and it requires a video card with a special connection for the built-in LCD. I may replace the LCD for a much better one but just trying to figure other stuff out first.

If I use a pico ATX PSU with an ATX to AT adapter that should free up plenty of room for me to add more expansion slots.

The pico PSUs are 12v so I would also need to get an external 12v power brick but those are readily available.

The pico PSU I would be using would be one of the 240w models.

Just wondering if the amperage on the 3.3v and 5v rails is going to be enough. I would probably stick to a socket 3 PCI / ISA board so I don't think it would be a problem.