Unknown 8085 opcodes

[Adrian Graham]

On 11/01/2017 17:23, "Tony Duell" <ard.p850ug1 at gmail.com> wrote:

>> 3463   17AD 08                  UNRECOGNIZED
>> 3464   17AE 17                  RAL
>> 3465   17AF 53                  MOV D,E
>> 3466   17B0 65                  MOV H,L
>> 3467   17B1 6C                  MOV L,H
>> 3468   17B2 65                  MOV H,L
>> 3469   17B3 63                  MOV H,E
>> 3470   17B4 74                  MOV M,H
>> 3471   17B5 20                  RIM
> 
> I'm no programmer, but that looks like ascii text to me. Have you
> tried decoding it
> as such?

Indeed, this is the same fragment:

1797 : 12 0D 54 65 6C 65 70 68        "  Teleph"            db    012H,
00DH, 054H, 065H, 06CH, 065H, 070H, 068H
179F : 6F 6E 65 20 44 65 74 61        "one Deta"            db    06FH,
06EH, 065H, 020H, 044H, 065H, 074H, 061H
17A7 : 69 6C 73 01 04 05 08 17        "ils     "            db    069H,
06CH, 073H, 001H, 004H, 005H, 008H, 017H
17AF : 53 65 6C 65 63 74 20 6E        "Select n"            db    053H,
065H, 06CH, 065H, 063H, 074H, 020H, 06EH
17B7 : 75 6D 62 65 72 20 74 6F        "umber to"            db    075H,
06DH, 062H, 065H, 072H, 020H, 074H, 06FH
17BF : 20 63 68 61 6E 67 65 01        " change "            db    020H,
063H, 068H, 061H, 06EH, 067H, 065H, 001H
17C7 : 06 00 08 1B 0D 31 20 20        "     1  "            db    006H,
000H, 008H, 01BH, 00DH, 031H, 020H, 020H
17CF : 20 50 42 58 20 45 78 74        " PBX Ext"            db    020H,
050H, 042H, 058H, 020H, 045H, 078H, 074H
17D7 : 2E 20 20 20 44 69 72 65        ".   Dire"            db    02EH,
020H, 020H, 020H, 044H, 069H, 072H, 065H
17DF : 63 74 20 4C 69 6E 65 01        "ct Line "            db    063H,
074H, 020H, 04CH, 069H, 06EH, 065H, 001H
17E7 : 09 00 08 1A 0D 32 20 20        "     2  "            db    009H,
000H, 008H, 01AH, 00DH, 032H, 020H, 020H
17EF : 06 50 72 65 2D 44 69 61        " Pre-Dia"            db    006H,
050H, 072H, 065H, 02DH, 044H, 069H, 061H
17F7 : 6C 20 50 61 75 73 65 20        "l Pause "            db    06CH,
020H, 050H, 061H, 075H, 073H, 065H, 020H
17FF : 28 73 65 63 73 29 01 0C        "(secs)  "            db    028H,
073H, 065H, 063H, 073H, 029H, 001H, 00CH
1807 : 01 08 25 0D 20 20 20 31        "  %    1"            db    001H,
008H, 025H, 00DH, 020H, 020H, 020H, 031H
180F : 2E 35 20 20 20 32 2E 30        ".5   2.0"            db    02EH,
035H, 020H, 020H, 020H, 032H, 02EH, 030H
1817 : 20 20 20 32 2E 35 20 20        "   2.5  "            db    020H,
020H, 020H, 032H, 02EH, 035H, 020H, 020H
181F : 20 33 2E 30 20 20 20 33        " 3.0   3"            db    020H,
033H, 02EH, 030H, 020H, 020H, 020H, 033H
1827 : 2E 35 20 20 20 34 2E 30        ".5   4.0"            db    02EH,
035H, 020H, 020H, 020H, 034H, 02EH, 030H
182F : 01 12 00 08 22 0D 34 20        "    " 4 "            db    001H,
012H, 000H, 008H, 022H, 00DH, 034H, 020H
1837 : 20 06 50 42 58 2F 4F 75        "  PBX/Ou"            db    020H,
006H, 050H, 042H, 058H, 02FH, 04FH, 075H
183F : 74 73 69 64 65 20 4C 69        "tside Li"            db    074H,
073H, 069H, 064H, 065H, 020H, 04CH, 069H
1847 : 6E 65 20 50 61 75 73 65        "ne Pause"            db    06EH,
065H, 020H, 050H, 061H, 075H, 073H, 065H
184F : 20 28 73 65 63 73 29 01        " (secs) "            db    020H,
028H, 073H, 065H, 063H, 073H, 029H, 001H
18

I was trying to work out why this phone system does nothing but 3 distinct
separate loops before heading off doing.....something. Obviously a delay
timer waiting for something else to start but why 3 different ones and not
one long one. Interrupts disabled too.

-- 
Adrian/Witchy
Binary Dinosaurs creator/curator
Www.binarydinosaurs.co.uk - the UK's biggest private home computer
collection?