The Sinclair QL Forum

would It not come under the wider scope of the BASIC language ? which is usually a left to right evaluation? I doubt if this was ever standardised in BASIC. AFAIK there is no such thing as 'standard BASIC'. It might as well be that SuperBASIC was the first BASIC that would let you use a function ca...

You could try the first entry of the slave block table, which is pointed to by SV.BTBAS ($28058). This will always be marked 'unusable' (all zeroes) since this entry corresponds to the first slave block in RAM, which starts at $28000 (or $30000 with dual-screen Minerva) and is unusable because the s...

Hi Jan, The compatibility fix could be to modify the code to read : a(x+1)=two( (x) ) Does this now work correctly on both systems ? It is a pity if code tweaks are necessary, but they are better than nothing... Regards, Steve. On SMSQmulator I get '2 0' and a(3) equals 200. Haven't been able yet t...

Thanks Norman, looks like I've got something interesting to read this week

regards, Jan.

Hi Jan, At present I do not have acesss to my QDOS system, being over the pond. Can you please try the following code under QDOS and SMSQ/E : 100 dim a(5) : x=2 : a(x+1)= two(x) : print x!!a(x) 110 DEFine FuNction two(x) 120 x=x+1 : RETurn 200 END DEFine QDOS (Minerva): 3 200 SMSQ/E (QPC2): 3 0 (wh...

Hi, If I remember correctly, the QDOS 'expression evaluator' evaluates a statement from left to right, (except where parentheseses override priority). So the QDOS evaluation is correct ? As for SMSQ/E, I cannot remember reading about expression evaluation priorities at all... or any changes to them...

What happens here is that calling function 'two' has a side effect of incrementing x by one. In QDOS, a(x) is evaluated first as the variable to be set (when x = 2), and then 'two' is called which returns 200 and increments x to 3, but the result is stored in a(2) because x was 2 at the start of the...

I wonder if anyone (Nasta?) knows whether the 8301 starts flashing in the _next_ pixel having detected a FLASH bit set, or on the current pixel? And whether the same applies at the end of the FLASH. (We know it is auto disabled anyway after the end of a scanline.) I've done some research with this ...

Just one note: if you only have one _asm file, you can use the -NOLINK option on the GST/QMAC assembler and it will generate the _BIN file directly without intermediate _REL file, thus removing the need to use the linker. You still need to use a SECTION directive though as this indicates that you're...

Peter wrote:Thanks, I didn't want to register for a minimal change, maybe you can correct data bus width to 16.

Oops, I thought I'd read 32 bits data bus where the manual says 32 bits address bus. I'll correct it asap.

Jan.