Reversible 16K RAM

Discussions about Sinclair ZX80 and ZX81 Hardware
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XavSnap
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Re: Reversible 16K RAM

Post by XavSnap » Sun Aug 04, 2019 6:34 am

McKlaud wrote:A10 line is connected via L2 (link) to the new memory chip.
Yes, you had to connect the L2 bridge.

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1024MAK
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Re: Reversible 16K RAM

Post by 1024MAK » Sun Aug 04, 2019 10:25 am

A different method (cutting tracks on the PCB) is shown here (the advantage being you can use plug in a new RAM chip without having to mess about with wires on some of the pins).
This site shows details of all the extra connections including the link wire.

Mark

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