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
Search found 2264 matches
- Wed Nov 04, 2020 11:42 pm
- Forum: ZX Spectrum Lounge
- Topic: What are missing on this board? (48k Issue 3)
- Replies: 4
- Views: 2768
- Wed Nov 04, 2020 11:34 pm
- Forum: Development
- Topic: QR Code version 1
- Replies: 14
- Views: 8281
Re: QR Code version 1
Nice - what resolution would be needed for a bigger QR code ?
- Wed Oct 28, 2020 10:01 pm
- Forum: Hardware
- Topic: ZX Spectrum 128k toastrack horizontal bars at power up
- Replies: 21
- Views: 10930
- Wed Oct 28, 2020 9:59 pm
- Forum: Hardware
- Topic: My first ZX81
- Replies: 5
- Views: 2838
Re: My first ZX81
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...
- Fri Oct 23, 2020 11:18 pm
- Forum: Hardware
- Topic: Spectrum +3 Keyboard issues
- Replies: 7
- Views: 4813
Re: Spectrum +3 Keyboard issues
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...
- Sun Oct 18, 2020 6:27 pm
- Forum: ZX Spectrum Lounge
- Topic: Harlequin video modifications
- Replies: 40
- Views: 43125
Re: Harlequin video modifications
"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...
- Tue Oct 13, 2020 11:58 pm
- Forum: Sinclair Misc
- Topic: Where can I find "true" ZX81 fonts
- Replies: 19
- Views: 36079
Re: Where can I find "true" ZX81 fonts
Is this the font you mean ?
Downloaded right now.
Downloaded right now.
- Fri Oct 09, 2020 9:54 pm
- Forum: SALES
- Topic: ginger-electronic back for sale
- Replies: 3
- Views: 6877
Re: ginger-electronic back for sale
Yes there was some tailback in orders, I saw.
- Mon Sep 28, 2020 10:04 pm
- Forum: SALES
- Topic: ginger-electronic back for sale
- Replies: 3
- Views: 6877
ginger-electronic back for sale
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
after a longer creative break I am back now.
If anybody needs something from my shop, it reopens on 1st october 2020.
Cheers,
Karl
Re: ZX81CCP
ZX8-CCB is temporarily sold out but planned to be come back in a few weeks.