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That's very cool, especially if it works on a Dragon too!

Oh yes, very true. Both Pedro and Cosmic Cruiser have to have a particular gap between the loader and the first title screen (or have the header stripped from the first screen). IIRC what those Imagine games do is seek the leader for supplementary files, but don't bother actually loading the header...

LOL!

You're welcome!

I guess if you change the last line to ADDA 1,S then you've got the remainder in A and just need to adjust the stack appropriately (LEAS 2,S) afterwards.

Or more simply:

PSHS B
CLRB
LOOP SUBA ,S
BCS END
INCB
BRA LOOP
END ADDA ,S+

Do you need a floating point solution? If not, with integers you could simply do multiple SUB instructions, counting the iterations until the result is less than the divisor. Of course if the divisor is 2, 4, 8, 16 etc then it's dead easy as you just need to do one or more right shifts (ASR/LSR) ins...

Just extremely busy Steve. I have some time-off in August so should be able to look at it again then, if not before.

Edit: Sorry... still been too pushed for time. Maybe in September!

zephyr wrote:(1) The game no longer (irritatingly) asks "DO YOU HAVE LOWERCASE?" when running on a Dragon 32/64.

That does appear to prevent (for example) the lower-case support built-in to T3 being used, though!

Yep, it simply uses a custom loader whilst sticking with the standard block format; very easy to do!

That output looks like two complete copies (and then some); think it just needs to be cut after the first 123 blocks!

The symbol rate is variable, since it takes only half as long to transmit a "1" bit compared to a "0" bit. I wonder if the quoted baud rate accounts for this (perhaps being an average), or whether it even makes sense to have a single value rather than a range? Really? Yep! Try filling a large area ...