Sinclair ZX80 / ZX81 / Z88 Forums

This is the ULA, upper 32k memory I think (8x TMS4532-20) and a few logic chips.
See the link here for a high resolution graphic:

https://upload.wikimedia.org/wikipedia/ ... rum_mb.jpg

Nice - what resolution would be needed for a bigger QR code ?

1024MAK wrote: ↑Fri Mar 06, 2020 9:14 pm Not sure. Horizontal bands are unusual.

Hehe unusual is good.
I would even say, its unuseful.

Not sure what you mean. There is no command to check RAM. You may use PRINT PEEK 16389 which gives 68 for 1k and 128 for 16k RAM. This is the dirty variant. ;) PRINT PEEK 16389*256+PEEK 16388 PRINT PEEK 16389*256+PEEK 16388-16384 This should give RAMTOP address (first line) and RAM installed/availab...

Maybe it is just a bad keyboard membrane. By the way, will sell the 48k-KDLX keyboards from next week again on sellmyretro. If you want a tactile safe clicker instead of non-responsive membranes. ;) By the way - fits perfectly under the upper plate/rubber mat. https://www.sellmyretro.com/offer/detai...

"First C35 (3.3nF) and R49 (2.7k) are removed. These are not needed and it is unclear why the CHROMA signal is connected to the composite sync signal this way and what was the initial purpose." What was the initial purpose?) These parts seem to be included in other ZX Spectrum clones too... Bildsch...

Is this the font you mean ?
Downloaded right now.

Yes there was some tailback in orders, I saw.

Hi,
after a longer creative break I am back now.
If anybody needs something from my shop, it reopens on 1st october 2020.

Cheers,
Karl

ZX8-CCB is temporarily sold out but planned to be come back in a few weeks.