🚀 go-pugleaf

hello. i have a question regarding the exact function of the upper data/lower
data strobes on the m68k. can the LDS be used in place of the missing A0 line?
in other words, if i do a byte access to an even addressed byte, the LDS signal
will be low, right. and if i do a byte access to an odd byte, the LDS signal
will be high, right?? can someone please verify my theory.

also, if the above is correct, can i do the following:

MOVEA.L $FB0000,A0
TST.B (A0,D0.W)

where D0 contains either an even or an odd integer??
in case anyone is wonderin' why i'm asking, i want to try to build an interface
to my atari 1040st cartridge port, which doesn't have write access capability.
i therefore have to use the bottom 8 lines of the address bus as a "data bus"
when i want to write to the cartridge port address space, and using one of the
higher address lines a pseudo read/write line. thus i need to somehow pass the
least significant bit on the address bus, which led me to believe the LDS would
do the trick.

thanx ahead of time for any info.

-- 
Ignac A. Kolenko                   "Squeeze my lemon, let the juice run
watmath!watcgl!electro!ignac        down my leg!" - Led Zep (Lemon Song)
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