Sinclair ZX80 / ZX81 / Z88 Forums

Thanks chernandezba,
I had to retrieve examples and demo to test my Centronics card...

Hi all,

Manual (fr): http://zx81.ordi5.free.fr/others/livres ... Manual.pdf

(Scanned by Gleike)

HI,
Yes, is a memory case error.
have a look to this tread: (fr) select the langage at the right top...
https://forum.system-cfg.com/viewtopic.php?f=1&t=10106

The Memotech Centronics I/F ROM Disassembly: ;------- TASM ASM mnemonics. ------- ; Compile this file using: ; Set TASMOPTS = -b ; tasm -80 ThisCode.tas MyBinary.BIN ;----------------------------------- ; Zx81 Program name: VB81 XuR [] : Empty Basic Segment. ; REM line name: D=10240/10623 : H=2800/2...

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[private message]

Hi the famous "Help Topics" …

Install Winhelp: select and launch the "install.cmd"

Copy the "EightyOne.chm" Have fun.

Hi Greg, New release available on the http://zx81.vb81.free.fr web site (r.18-08-19). The text number floating point retrieved, seem to be fixed. Capturefp4.JPG :oops: [EDIT] 10 LET P=VAL"128" 20 PRINT P In this case, on the old release , you had to edit the wrong value (64 instead of 128)… LIST 10 ...

Ok… It's due to a bad "text to P" floating point error on the "128" value conversion. "128" text value is ok in the basic program, but the encoded value "128xxxxxxx" is wrong. 10 LET P=128 20 PRINT P Will be wrong too. We had to get the string value to avoid this error : 10 LET P=VAL"128" 20 PRINT P...

True, something's wrong…
Had to have a look to it.