Sinclair ZX80 / ZX81 / Z88 Forums

Regarding this new variant seems to work too //...// (and I have the same curiosity on how is possible to return back to the same place after a jump! :)) I tried to change the last instruction instead of "jp endofprogram" to "jp startofprogram" but seems it is not working (the program ends anyway w...

You're right! And this seems to work too and is two bytes shorter. It just interprets "INPUT A$". Regarding this new variant seems to work too!! :D :D I had to "rewrite a bit for TASM to work: startofprogram: .org 4082h ld hl,instructiontextinputadollar ld (4016h),hl ; CH_ADD jp 0CDEh ; LINE-NULL ?...

In the code in the attachment ... It works! :D Before seen your last answer I tried to disassemble myself and seems I did despite 25+ years of not using Z80 code anymore! (btw never used it on ZX81) rem content to run: 33 21 LD HL,408E ; 16526 -> A$ ADDRESS OF THE PRINT STATEMENT 142 8E 64 40 34 22...

I need to read in assembly ZX81 a little string as user input. I've seen various routines that allow to read it 1 character at a time. I was wondering if there is a possibility to call the standard basic subroutine that perform the instruction "INPUT A$". It will have various advantages: 1. should b...

Happy to test!

PS:

Tryed F8 with an old Windows XP computer and everything run fine!
(should I rob my daughter of her computer? )

"Run as administrator" infact change something: now the program simply terminate without visible error

> Hmm - what operating system do you have ?
Windows 7 Enterprise SP1


> CTRL-F8 and CTRL-F9 do work normal ?
Ctrl-F9 yes, compile
Ctrl-F8 same fatal error!...

When I try to run (F8) I get an error from the IDE (than close immediately after):
"The instruction at 0x00427c85 referenced memory at 0x00427c85. The memory could not be written."



Same error if I try "transfer file"...