The Sinclair QL Forum

Happy Belated birthday Dilwyn - it was my partners birthday on the same day! Hope you had a good one!

Or do you mean fool the trump card into thinking the drive is 780K (QL uses a slightly different format so more space is given)? Biggest issue with using the 1.44MB drives is they were mostly meant for the PC market - so come selected as "Drive 1" and use the cable twist between 1st and 2n...

Nice work

I was probably going to go for assembler as I'm a glutton for punishment :-) for the 8 bit value - I reasoned that I would be able to loop around 8 times, using the new value of the bit assignment as a mask and decide whether to AND or OR the bit to set it's value based on the original value. I was ...

I have a question relating to bit reordering in a byte / word or even long word. I have seen algorithms to swap one value for another by using XOR technique, and also algorithms to swap bits in the byte or word from lowest to highest and vice versa (reversing the bit pattern). What I want to achieve...

And with some good examples too

you'll probably need more than one book - as there's 68000 assembly programming - and then there's the specific application of programmming 68008 code on the Sinclair QL. The book Dilwyn mentions is a good one, for more general techniques I found the cybex "Programming the 68000" a useful ...

Dilwyn has a useful list of some of the ROMS associated with the QL and it's peripherals - there are some Sandy ones amongst the list:

http://www.dilwyn.me.uk/qlrom/index.html

I wonder if it's worth including this in your article when you publish it? - as it's a good illustration for those of us that are prone to making mistakes like this (I am including myself in that).

Has anyone got a dissassmbly of the QEPIII ROM ? I think if we had that it might be an easier task to expand the capabilities. I would add these as wish list items too: 1) use a different device/devices to address the I/O so that the E signal is no longer required - the 6821's used kind of force tha...