Sinclair ZX80 / ZX81 / Z88 Forums

Which other of your games uses the same sysvars? I would like to check whether it runs on my ZXNU ..

dr beep wrote: ↑Mon Nov 06, 2023 3:48 pm Only ROM-call made is a6e to copy the screen.

The code of Bigbang rom and Sinclair rom is identical at that location.

Siggi

Same like my real Zeddies:

GOL-Bugfree Works on EO (V1.23), but not on my ZXNU (>64K ram, Bigbang ROM).
Crashes after pressing 'Z'

Siggi

using 21 LPRINT C$(1 to 2); is easier. Then the machine code can fetch PRINTABLE(!) characters from printer buffer (address 16444....) and the length of the basic code does not need to be calculated to call the machine code (line 20). A single number X can be passed to m/c using RAND X and fetch th...

if LPRINT is terminated by ';' NOTHING is printed

Hi Greg nice demos :) Maybe the subroutine's interface to the machine code can be done more easily using LPRINT ; if printable characters need to be passed to m/c. Instead of poking the characters into the machine code: 21 POKE L+1, CODE C$(1) 22 POKE L+3, CODE C$(2) using 21 LPRINT C$(1 to 2); is e...

What style of writing would you like? For instance I could write it as telling my story or just like a manual explain how to get most out of 1K Maybe the structure could be like the ZX81 BASIC Manual? It is well done to learn BASIC. And to learn C, the same structure was used: https://forum.tlienha...

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