Msg: 7063 *Conference*

04-04-97 19:17:58

From: RON WIESEN

To : COMET _

Subj: REPLY TO MSG #5319 (UNDOCUMENTED 80C85 OPCODES)

Well, I looked at RELOC1.BA in Uploads - line 42 has RST 0 corresponding to
op-code CFh which ROM2 disassembles as RST 0 where standard ROM state, and as
CSR memadr where option ROM state.  I think CFh was one of the several I added
to RELOC.BA (in the library) some time back.

Might the mnemonic CSR stand for Chip Select of ROMs? - Hmmmm, could be.

As to op-code CBh, it's the only op-code without a mnemonic in RELOC1.BA.  And
I remember that the corresponding mnemonic I left in RELOC1.BA was merely three
dashes "---".  So the mystery continues Comet.  Later