ASSIST09 Command List (adapted from Jeff Tranter's SBC6809 project)
| Command | Arguments | Action |
|---|---|---|
| B (reak) | <cr> | list break points |
| NNNN | insert break point | |
| -NNNN | delete break point | |
| - | delete all break points | |
| C (all) | <cr> | call routine at PC as subroutine |
| NNNN | call routine at NNNN as subroutine | |
| D (isplay) | NNNN NNNN | display range mod16 |
| NNNN | display 16 bytes [NNNN]mod16 | |
| M | display 16 bytes [M]mod16 | |
| P | display 16 bytes [PC]mod16 | |
| W | display 16 bytes [W]mod16 | |
| @ | following NNNN, M, P, or W displays 16 bytes indirectly | |
| E (ncode) | Encodes a 6809 postbyte based on the addressing mode syntax | |
| G (o) | <cr> | Go to PC |
| NNNN | Go to NNNN | |
| L (oad) | Load a S1-S9 format data | |
| M (emory) | NNNN | Display memory data at address NNNN |
| <cr> | Terminate memory function | |
| / | Display current byte with address | |
| <lf> | Display next byte with address | |
| caret | Display previous byte with address | |
| , | Skip byte | |
| SPACE | Display next byte | |
| The / may be used as an immediate command. | ||
| After any of the display commands the memory contents may be altered by inputting a valid hex number or ascii 'string' enclosed by single quotes ('). | ||
| O (ffset) | NNNN NNNN | Calculate the two and/or three byte offset |
| P (unch) | NNNN NNNN | Punch a S1-S9 format data |
| R (egister) | Display 6809 registers and allow changes | |
| <cr> | terminate command | |
| SPACE | terminate value input or skip to next register | |
| , | terminate value input or skip to next register | |
| V (erify) | Verify memory against S1-S9 format data | |
| W (indow) | NNNN | Define a display window for the D and M commands. |
| Ctrl-X will abort any command. |
R = X, Y, U, or S
Direct Addressing Modes
------ ---------- -----
,R A,R
H,R B,R
HH,R D,R
HHHH,R ,-R
HH,PCR ,--R
HHHH,PCR ,R+
,R++
Indirect Addressing Modes
-------- ---------- -----
[,R] [A,R]
[B,R]
[HH,R] [D,R]
[HHHH,R]
[HH,PCR] [,--R]
[HHHH,PCR]
[HHHH] [,R++]
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