It was followed by FB which may never have left the factory - we
know that Psion had to alter their boot programs to cope with the
difference in the AT command in the FB ROM compared to later QL ROMs
(they didn't bother checking for the earlier PM ROM). No-one else
had to make this change or ever use it, so it looks as though by the
time the public got their hands on the QL, the operating system was
at least AH (which was soon followed by JM, JS and MG ROMs).
I'm pretty sure I had an FB machine when they came out, as I remember
the AT x,y problem quite clearly .
Also, as I didn't find out about version PM until many years later (I
remember Simon explaining about it), I'm sure it must have been
version FB ROM which I had. That QL got returned within weeks for an
update, but I don't know if the machine which came back was the same
one as I first had, or a different computer.
So, assuming that the old DJ memory chips are working correctly and
I'm correct, FB must have been issued to some early customers.
Dilwyn Jones
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