Timex/Sinclair Compatibility Problem

I own a Sinclair ZX81 computer and a Memopak 32K RAM. I recently purchased a Timex/Sinclair 2040 printer, and I am unable to get the computer to work with the Memopak and the printer attached.

The Memopak works fine with the computer alone or with the Sinclair 16K RAM, and the printer works with the computer and with the Sinclair 16K RAM. However, the computer will not display its cursor when the Memopak 32K RAM and printer are both attached.

Can you tell me what's wrong?

Paul R. Harrison

The Timex/Sinclair 2040 printer is not compatible with Memopak for some unknown reason. Memotech, manufacturer of Memopak, is investigating. Contact them directly for further information. As you have noted, the Memopak works very well with the ZX81 – and with the proper interface, works well with a wide range of printers.