[Coco] Assembler directives
Phill Harvey-Smith
afra at ramoth.org.uk
Wed Mar 20 07:21:26 EDT 2019
Hi all,
I'm currently working on a version of the disassembled Dragon ROMS that
can be assembled to produced any of the following :
Dragon 32 ROM,
Dragon 64 ROM used in map 0
Dragon 64 ROM copied to RAM at $c000 and used in map 1
Dragon 200e ROM, this is the Spanish Eurohard's modified Dragon 64
I'm currently using Boisy's mamou** to build this, which works and
produces binary identical ROMS.
**Though I'm not averse to using something else e.g. lwasm if there are
advantages to doing so....just last time I tried lwasm it's assembly
times seemed much longer.....
However there are multiple conditional parts assembled with nested ifeq
/ ifne etc for example :
ifne dragon64
ifeq dragon200e
FDB $3634 ; '64'
else
FDB $0000
endc
else
FDB $0000
endc
Is there a more succinct way of expressing this so that multiple
conditions can be combined.
e.g. something like C's
#if defined(dragon64) & !defined(dragon200e)
FDB $3634 ; '64'
#else
FDB $0000
#endif
Cheers.
Phill.
--
Phill Harvey-Smith, Programmer, Hardware hacker, and general eccentric !
"You can twist perceptions, but reality won't budge" -- Rush.
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