View source for MicroAce



The MicroAce was an unauthorized clone

of the Sinclare ZX80

It came in a kit for for about $79.

It was a UK product that would connect to a TV set.

It called for a zero ohm resistor

but was not included.

I had the unit working

but when connected to the TV set

the vertical hold had to be adjusted.

If the TV was changed back to watch

the vertical hold again had to be adjusted.

Finally, I realized the UK uses 50 cycles

and the US uses 60 cycles.

I added the zero ohm resistor

and it solved the problem.

This unit had a film keyboard

but surplus keyboards were readily available

I added a real keyboard

and also cliped in front of the TV modulator

and ran video to a monitor.

The video vastly improved.

I bought two of these usits.

The first had interger basic 

and 1K of RAM

The second had floating point

and 2K of RAM.

It was amazing what could be done with 2K of RAM

Later, I bought a Sinclare ZX81

and even bought a 16K addon memory.

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