Msg: 898 *Conference*

11-11-91 23:25:49

From: TRACY ALLEN

To : TIM MIHULKA

Subj: REPLY TO MSG #885 (8085 MACHINE LANG.)

Dear Tim,
  That's right, RIM=20h and SIM=30h.  Also, if you can use them, the 80C85
recognises the "undocumented" 8080 op codes,  LHLI=EDh   SHLI=D9h  HLMBC=08h
as well as  the two-byte shifts.   If you want to program additional stuff into
the "bonus" space in your TS-DOS ROM (the bonus space is a feature, not a
drawback!)  You can also use the CSR adrs psuedo-op to get from the option ROM
to standard ROM and back.  All the Travelling ROMs (I think) use that
pseudo-op.  It is coded as RST6 adrs.  
 -- Tracy
  (Nerdvanna huh?!)