In ZX Basic, the AND operator just means 'if second operand is nonzero then take first operand as result, else 0'. This even goes for strings, a command like 'PRINT "hello" AND X' prints "hello" if X is nonzero and the empty string if X is zero. This cannot be reproduced on the Q...

Hi All, The SMSQ/E manual page 29 mentions the possibility of using the keyword PIPE to communicate between EXed programs. PIPE is not a keyword but a device. Basically, it's a queue which you can write data ('PRINT') to by one job and input data from by another job. It's a bit tricky to use from B...

Sensational! You've just opened new doors... If I remember correctly, the 768K Trumpcard (and clones) compromises the use of ROM port, or am I wrong? IIRC the Trump card only monitors a (first) access to the ROM port by the CPU to page in its extension ROM at $C0000 (note: not $C000) so the QL find...

Oh dear - seems that something goes wrong when I edit a quoted reply - the forum software keeps adding quotes, even my own text got quoted!

that's more or less what SpeedScreen does - It checks whether character positions align with font origins and handles this special case much faster than original QDOS. Well, in the end, QDOS doesn't literally call the PLOT routine, of course. Not only the character positions, also the various colou...

that's more or less what SpeedScreen does - It checks whether character positions align with font origins and handles this special case much faster than original QDOS. Well, in the end, QDOS doesn't literally call the PLOT routine, of course. Not only the character positions, also the various colou...

that's more or less what SpeedScreen does - It checks whether character positions align with font origins and handles this special case much faster than original QDOS. Well, in the end, QDOS doesn't literally call the PLOT routine, of course. Not only the character positions, also the various colou...

In the Netherlands, universities are closed for students since last Friday. Following much discussion, the government decided on Sunday that all schools will be closed too until at least 6 April. Also, all pubs are closed, including night clubs and coffee shops. As this was announced on very short n...

The rounding of numbers to 7 digits that occurs when SAVing is because S*Basic programs are saved as ASCII files, so the internal representation of floating point numbers gets lost. This is indeed a 'feature' of S*Basic I regularly ran across when I wrote programs for astronomical calculations which...

Finally, my Q68 already has QL NET installed by Derek Stewart. Derek has performed a very professional installation, the connectors are firmly installed and very discreetly on the Q68 right side. Looks very good. I have recently fitted it myself but chose to sacrifice the power switch for it. Fitti...