Sinclair ZX80 / ZX81 / Z88 Forums

For ZX81 floating point, the sign is in the 2nd value byte as shown in the original "ZX81 BASIC Programming" book.

Chapter 27 - Organization of memory

For comparison, here is the same BASIC routine converted to C++ known issues: * since it doesn't calculate the FP conversion in the exact same way as ZX81 Basic, it rounds differently. * I haven't tested or implemented E+00 notation for extremely large or extremely small numbers #include <math.h> //...

Sorry, I haven't been able to access the forum all week (I get "Error 503 : Service Temporarily Unavailable"). I finally borrowed another computer. Here is the requested 32-bit app. It is not VB, as the free versions of VB are now Visual Basic .NET and are not compatible with Visual Basic. It is a C...

I wrote this 10 years ago, not sure how accurate it is. But it seems to work. Comments/corrections are welcomed. David G Sub FloatToDec (ZxString$, DecNumber#) Dim FirstByte As Double Dim ZxDigits As Double Dim SecondByte As Double Dim t As Double Dim Xdigits As Double Dim ZxSign As Double Dim figur...

Thanks XavSnap.

I have now included Cmdialog.vbx in the attachment.

I had previously tried ZXTools, but wasn't able to figure out how to install it.

feel free to post errors or missbehaviours just here I notice some unexpected behavior and could not find a previous report. When concatenating strings, ZX-IDE compiles: this: 5 LET U$="HELLO " 8 LET U$=U$+"CLIVE" 12 PRINT U$ to this: 5 LET U$="HELLO " 8 LET U$=U$+AT CLIVE 12 PRINT U$ The original ...

Hi team, EDIT: 5 October 2022 version 6.5 beta now available (download is below) for modern Windows Been doing a few bytes of ZX81 coding recently. Zx Lister 6.0 takes a P file as input, and outputs a text file containing the BASIC listing. It's now compatible with the ZX-IDE Software Development To...