Sinclair ZX80 / ZX81 / Z88 Forums

Some excellent links there. Many thanks Martin and Blittled.

this is driving me nuts. here is the excerpt:

Using the program "HEXLD", enter the following program, by inputting the symbols in the left hand column. Once the whole program has been entered, break out by inputting "S".

2600 LD H,00h
2E2A LD L,2Ah
C9 RET

here's the issue, i type the numeric code but the zx81 goes blank for an eternity requiring a reset.
Do i press enter each time or do i have to enter the numbers one after the other?
please help, this is making me very,very irritated.

Any ideas?

Edit: figured it out, why can't they just swap input with press enter?

"Started learning Machine code: Am i doing this correctly?"

What would John McCarthy say...?


In all seriousness I'll read through this thread and pick up some tips!

Good luck!

Thanks Shaun for this advice!

Crayon21, thanks for this… ASM tutoral.

http://www.users.waitrose.com/~thunor/m ... ter02.html
A RAND USR 30000 give me a 0/0 prompt… (without RAMTOP to clear it by a 'NEW' command)
30000=$7530
Cool !

"26" n/l
"00" n/l
"2E" n/l
"2A" n/l
"C9" n/l
"S" n/l
RAND USR 30000

Not:
"2600" n/l
"2E2A" n/l
"C9" n/l
"S" n/l
RAND USR 30000

XavSnap wrote: ↑Thu Jan 09, 2020 2:13 am
"26" n/l
"00" n/l
"2E" n/l
"2A" n/l
"C9" n/l
"S" n/l
RAND USR 30000

Not:
"2600" n/l
"2E2A" n/l
"C9" n/l
"S" n/l
RAND USR 30000

I would assume they would give the same results.

If you use You can get the output to Basic with PRINT USR 30000 would in this case output The content of BC is automatically returned to Basic.