- try swapping the CIAs to see if that changes your keyboard problem, one is possibly hosed
- the very short SCSI cable does actually work without a terminator most of the time but I'd add proper termination nonetheless - if you can't find a proper resistor pack for the mainboard an external terminator is fine as well (Macintosh style) - and more practical when you want to use external drives
- ZIPs come in 1Mx4 (xx4400) or 256Kx4 (xx4256) sizes, the latter add only 1 MB per bank
- the ZIP chips may also be xx4402 or xx4258 - these are static column chips that are slightly faster with an '030)
- you can't mix 1Mx4 and 256Kx4 chips
- if you've only got 256x4 ZIPs and can't fill all banks you can empty the first bank, move those chips up and refill the first bank with easier to get 256Kx4 DIPs
- if you mix static column and fast page chips the first bank must not be all static column