The Sinclair QL Forum

Hi ! All these are not bugs but "features". You should also explore the cases of negative divident or divisor or both. In ComputerOne Forth (that within the standard should know only about integers and flooring division/modulus) there was here a real bug, the most serious one I found, but ...

A little while ago, for my 74th birthday I received : 1/ I discovered recently that there was a japanese company that still made slide rules (especially circular ones), and I always dreamed of such a device : here it is, together with my original "computing device" that I was offered for X...

Here is a new version of my CONWAY_DPF file for superForth, sightly modified to add a word "bench" to compare runtimes with or without plotting : : .< 0 <# #S #> TYPE ; : >< ( n,a,b --- [a<=n<=b] ) >R OVER <= SWAP R> <= AND ; CR CR .( Conway's life in a ) 120 DUP .< .( x) DUP CONSTANT ww (...

I shared my Conway program here : https://qlforum.co.uk/viewtopic.php?f=3&t=215&p=1438&hilit=conway+superforth#p1438 Tomorrow I will try to add a "word" (in the FORTH sense) to benchmark it with and without plotting. To play with it, you will have to install first Digital Preci...

Here I show two screen shots of what I get on my Pis on a 1680x1050 display : First with sQLux, 'WIN_SIZE = 2x' in the .ini file sQLux.jpg Then with uQLx, with the command 'xzoom -mag 2 3 -source 512x256' uQLx.jpg Both emulator windows are exactly the same (and circles are circles !), but on the uQL...

Hi all ! As one of my two QLs is no longer booting and the other one is still confined in the Alps, I decided to fall back on emulators in Raspberry Pis. I have a Pi Zero W running an old raspian, that I use for QL emulation with uQLx (and also for a Ceres-Oberon 1984 workstation emulator which I li...

Hi, Which is the best Forth to use? The question is : on what machine and for what ? Classic FORTH machines were 16bits on 64Kb (or less) memory, and could be (and were) metacompiled for almost all processors, following basically very similar models (norms : 79, fig, 83...). What this programming e...

That I am not interested in assembler does not mean that I did not. My first "personnal" computer was a SCMP elektor kit that you could only program with machine code through a hex keyboard, my second was the elektor so called "game" computer with a Signetics 2650 CPU to program ...

Typically, the FORTH machines adopting the norms up to FORTH83 were 16 bit machines in a memory space of 64Kb (or less). They may be metacompiled with the help of a FORTH macro-assembler for the FORTH engine and all the low level and hardware dependant primitives. Stephen Pelc at MPE did it this way...

ComputerOne is a company that sold in the eighties software products for the Sinclair QL. Surprisingly, some of their product (like their assembler and a monitor) are today PD, but not their FORTH, because apparently nobody knows who owns the copyright. I was lucky to buy one in these times and I fi...