MTXL
----

My notes investigating what it does...

MTXL.COM loads the file to 4000 onwards
records the end in (bff0)
wipes f000-ffff, goodbye CP/M, CBIOS, drivers
copies second part of itself 0171 onwards to f000 and jumps to it
moves end from (bff0) to (eff0)
sets IOBYTE to 0
sets LSTPG to 1
reads country code bits from port 6, stores in CTYSLT
ldir 017c fa8a (=USER+1) 0018
ldir 090a fd4b (=RICHJL) 001a
sp=fd48 STACK
set IOBYTE to 0
RST 40
do some virtual screen stuff
RST 16
...
set BASBOT to 4000
some copying around
jp 0231
