Sinclair ZX80 / ZX81 Forums

zsolt wrote: ↑

Fri Jun 22, 2018 9:55 am

Hi Siggi,

siggi wrote: ↑

Wed Jun 20, 2018 9:59 pm

If your current rom is the final version,

No, the final version with a "Big Bang" is still under construction.
Zsolt

Using that "Big Bang" version the Zeddy then can execute an endless loop within less than 3 seconds. Correct?


Siggi

But why not rename the labels to the desired format? Hi ZSOLT If your current rom is the final version, that would be OK. But if not, it must be done with each new version ;) I want to do some more patches I have in my own roms to support my own hardware better (LOAD/SAVE using MMC/Mefisdos, bank s...

Hi ZSOLT I tried to assemble your source using Pokemon's IDE (using FASMW-ZX.EXE) and the assembler used in Z88DK. But none of them can handle the labels you are using, e. g.: not_1 NEG They accept only such labels: not_1: NEG or not_1 NEG :( Which assembler to you use? Is it availabe somewhere (I a...

I just testet Memocalc without my SAVE/LOAD patches. Now it can save/load data files using its internal "LOAD A$(L TO C)" :mrgreen: But the filename is a little bit strange: I saved "mtest", and Windows sees a file with invalid filename it cannot handle: "mtest<-<-<-.<-<-<-" (where "<-" is one chact...

Great progress :mrgreen: Just testet LOAD "Memocalc" and it worked :mrgreen: Now it seems to be possible to LOAD programs also by a running program (not only by the user, pressing DS-L). Currently I cannot LOAD/SAVE Memocalc data files (which are loaded/saved by Memocalc by the command "LOAD A$(L TO...

Using the SGMORE.ROM the display is OK (no shifted pixels).

I think I should use this rom for further math tests, until Pokemon has time to help.

Siggi

Hi Zsolt,
now the display is working
But it is a little bit disturbed: the first 3 pixel lines are shifted right:

Thus there seems to be a small timing difference.

Siggi

Hi Zsolt Is it possible to see the "master"-code? Pokemon has not published this code, so currently the answer is NO. But I will ask Pokemon (but he is very busy at the moment). My assumption is, that the master code "catches" the NMI and executes it in its own ROM (to check for task switch conditio...

olofsen wrote: ↑

Sun Jun 10, 2018 9:29 am

The LD HL,($400C) in the NMI routine is three bytes earlier, at $0071, so that there is no display.

If that is the only reason: maybe it would be sufficient to leave the "NMI-CONT" routine at its original place? That would not waste time, only some bytes space ...

Siggi

Maybe Pokemon could fix that in his ZxMore Master program? He seems to be busy at the moment, but meanwhile a "patch" for running your new ROMs at ZxMore would help? Changing some bytes in the beginning of the ROM should not be too complicated (man POKE )

Siggi

Edit: I have sent a PM to Pokemon