Whitechapel Computer Works MG-1

Quite likely. All it really needed was a voltage to energise the mains swtiching relay. Once the PSU had started up, the relay would be held in until it was turned off by software (this was a trick used on a number of UK unix boxes, the power-off button tells the system to flush buffers, do an orderly shutdown and then turn off the power relay). The method using a 9V battery is official, it's in the technical manual I have somewhere. Quite likely. The chip was renamed for marketing reasons IIRC (it was a 16 bit chip with 32 bit registers, renamed as a 32 bit chip with a 16 bit bus or some such). [RAM expansion] Yes. The RAM cards were essentially DRAMs and buffers, The 512K one had 4164s, the 2M one 41256s. There were other differences, and I have never tried to turn a 512K one into a 2M one. The RAM board connectors were wire-wrap DIN41612s (64 pin AB row). They were soldered to the RAM boards, you could stack the boards by putting the long wire wrap pins of the top board into the sockets on the board below (this was official), There were screwed spacers to support the boards, but it was not uncommon to forget those. At which point you got RAM wobble (as in the ZX81...) [...] The keyboard was a Keytronics capacitive thing, and feels much like any other. The mouse is one of those Swiss Depraz ones, nice when you get used to it. Its a standard quadrature 3 button mouse, in fact my machine came with a defectrive Depraz mouse (which I repaired) and an Acorn mouse re-wired to work. I am pretty sure the keyboard interface is documented in the manual, it's something like 1200 baud asynchronous so you could always substitute another keyboard if you really hate the WCW one. -tony