Sinclair ZX80 / ZX81 / Z88 Forums

1024MAK wrote: ↑Mon Jul 04, 2022 11:39 am Note that modern SRAM chips are much faster than older technology SRAM chips. Access times can be much, much faster. This may cause timing problems in some circumstances.
Mark

Indeed. I STRONGLY recommend to connect the ram's /OE only to /RD AND /RFSH, never directly to GND or /CE!
Siggi

A nice demo. Thanks.
Could you also post the original and the adapted source?

Siggi

Hi Stefano something is strange: when I enter the first letter of the secret word to be found, it is shown on screen (upper line), but is overwritten by the second letter entered later. All following entered letters are shown correctly on screen. I used a real Zeddy with BigBang-rom and EOV1.23 (sam...

Thanks for this Christoph. :D It is a shame that partial Pascal cannot do more because I think it is good to have other languages for the Zeddy and try a different way of working. It is also a shame you cannot access the full 32 k of the ZXpand which for example H4th can do ( although it still uses...

Google found: "Full text of "c't (Magazin fuer Computertechnik) 12/1983"" https://archive.org/stream/ct8312/ct8312_djvu.txt Zubehör von Logitek Druckerinterface für ZX-Spectrum LPRINT, LUST, COPY läuft nun auch mit EPSON und Seikosha Druckern MX-80, GP-80 usw. Druck ohne Zeitverlust wie bei Druckerp...

AFAIK Memotech (and Sinclair?) ram packs have their own refresh counter. And other ram packs often use static ram, which does not need refresh.
Futhermore any usual ram access also does a refresh of the accessed ram columns.

There is a thread in the German Forum which gives possibilities to use partial Pascal without the need of using tape. It's for 48K RAM only, so not suitable for plain ZXPAND users. https://forum.tlienhard.com/phpBB3/viewtopic.php?t=4076 Meanwhile there is also a solution for "plain ZXPAND users" (3...

If you have the manual as DOC (MS-Word) or Open Office file, I could do the changes in that document and send it back to you.

Or I could make screenshots of the errors and could add a description, what needs to be done.

jdfan1000 wrote: ↑Sun Mar 21, 2021 3:51 am Ok, I believe I've finished cleaning it up and apply typographic magic.

This will also be on archive.org any minute now.

I found some misprints in the manual. And some functions and procedures are missing in chapter 5.13 (e. g. ram,usr,lsl,move,page).
Any chance, to update the manual?

Siggi

The program can be found there:
https://www.zx81stuff.org.uk/zx81/tape/ComputaCalc

Siggi