The Sinclair QL Forum

Yes, for black & white photography, I do everything (development, enlargement...) myself, the chemical way, in a tiny lab that I built myself in a corner of my garage : http://35mm-compact.com/album/albums/userpics/10032/thumb_Abri_antinum%C3%A9rique.jpg For color photography, I give the films t...

Just noticed this place for telling about other hobbies ! My other hobby is photography, more precisely silver/film/analog (as you like) photography, with a peculiar predilection for self-made pinhole camera picture taking. Here is the first "anamorphic" pinhole camera that I built : http:...

I bought my first QL almost immediately after it was "seriously" released (Xmas 1984) even before it was officialy released in France (with an AZERTY keyboard, so mine still had a QWERTY Keyboard). I bought it essentially for the same reason as my ZX81 : programming ! SuperBasic could be c...

Wouldn't this scheme only work if SuperBasic is the only job running ? Otherwise, I guess that other jobs may be stealing 1/50sec time slices ? same question for PAUSE 1 : normally it pauses the computer (actually the SuperBasic job) for at least one 1/50sec cycle, but actually may it not pause for ...

Is it displayed in high resolution (4 colors) or low resolution (8 colors) ? I did some 3D anaglyph graphics, but used a special SCART cable letting switch the green and blue signals, so that in 4 color mode, you got Black-Red-Blue-White instead of Black-Red-Green-White : thus, the red/blue 3D glass...

I coded these few FORTH words to probe into the QL floating point format, and found interesting things... .( Probing into QL floating point format ) cr : .. ( n<256 --- ) 0 <# # # #> TYPE ." " ; : ... ( n --- ) 256 /MOD .. .. ; : .W ( 16bit --- ) BASE @ >R HEX ... R> BASE ! ; : .L ( 32bit ...

Here we have to my opinion, two subjects of confusion : 1/ how does the "original QL" floating point engine work ? 2/ what does the "original QL" RND function exactly do ? 2> It is said that without any parameter, the RND function returns an "unpredictable" floating poi...

The only real way of getting a truly random number without a battery backed clock, is for the program to include a prompt for the user to press a key before the RANDOMISE command And why not a prompt asking the user to enter the actual date ? Then you would have a "user backup'ed clock" Q...

Let's be simple : why does it have to be counting milliseconds ? any short time intervals will do ! So suppose that when powering up your QL you start a very tiny job written in assembler that just increments continually a 16bit or 32bit counter as fast as it can (only a couple of machine codes, I g...

C68 also handles the translation between IEEE doubles and QDOS FP format when callng graphics routines (which are the most important ones in QDOS where floats are involved) Thank's, this is really the answer to THE question I was wondering about. An alternative could have been that the math library...