There are two mini-memory areas on the info panel. You can view memory in Hex, (normal 7-Bit) ASCII, or Apple (8-Bit) TEXT format.
Control characters are shown in yellow. The Apple uses something called 8-Bit (High-Bit) ASCII, in which the first 128 characters (normal ASCII) are also mapped onto the last 128 characters, but with a different background. (Technically, the first 64 characters are drawn inverse, the next 64 characters flashing, and the last 128 normally.) Some programs will store text in this extended Apple format, where a High-Bit character can be used as a flag to represent an end of word.
Here is a summary:
Normal ASCII (non-control characters) will show up in cyan; High-Bit text in white.
Apple TEXT (normal ASCII) will also display with an inverse background; High-Bit with a normal background.
|
Command |
Effect |
|
M1 #### |
View mini-memory 1 in Hex at the Address |
|
M2 #### |
View mini-memory 2 in Hex at the Address |
|
MA1 #### |
View mini-memory 1 in ASCII at the Address |
|
MA2 #### |
View mini-memory 2 in ASCII at the Address |
|
MT1 #### |
View mini-memory 1 in “Apple Text” at the Address |
|
MT2 #### |
View mini-memory 1 in “Apple Text” at the Address |
|
D #### |
Alias for M1 |
Examples:
|
Input |
Effect |
|
MA1 D0D0 |
View Applesoft Tokens (Low ASCII cyan, High ASCII white) |
|
MT2 FF0A |
View Apple message displayed when booted, showing Apple Model. |
|
DATA |
Switch to the Data Window to view memory. Most scrolling keys work. |
|
CODE |
Switch to the Code Window to view the disassembler. |
You can search memory for hex values. Wildcard support is also supported via the '?' wildcard operator, including nibble searching. A single '?' by itself, means match one byte of any value. A hex value with the high nibble or low nibble of '?' will mask off the corresponding nibble. (At the moment there is no way to refer to the list of results. A future version will support _# to reference search result's addresses.)
Searching memory for text is forthcoming in a future version of the debugger.
|
Command |
Effect |
|
SH #,len byte1 … |
Search memory for 8-bit hex value(s). |
|
SH #,len word1 … |
Search memory for 16-bit value(s). |
Examples:
|
Input |
Effect |
|
SH 800,8000 C030 |
Search memory for speaker access. |
|
SH 800,8000 AD ? C0 |
Search memory for “ LDA $C0xx”. |
|
SH 800,8000 3? C0 |
Search memory for speaker access $C03x. |
|
SH 800,8000 ?1 C0 |
Search memory for soft-switch $C0x1. |
|
L _1 |
Disassemble from search result #1 address. Note: Not yet implemented! |
To change the Apple's memory, the classic "Apple Monitor" command to enter
memory is recognized, as well as the "normal" debugger comamnd.
|
Command |
Effect |
|
####:byte1 … |
Classic "Apple Monitor" command to enter byte(s). Alias for E. |
|
E addr byte1 … |
Set memory to the 8-Bit (byte) value(s). |
|
EB symbol #### |
Alias for E. |
|
E8 symbol #### |
Alias for E. |
|
EW symbol #### |
Set memory (at the symbol Address) to the 16-Bit (word) Value(s). |
|
E16 symbol #### |
Alias for EW. |
|
NOP |
Writes an “NOP” opcode (EA) at the current Program Counter (PC) |
|
ZAP |
Alias for NOP. |
Examples:
|
Input |
Effect |
|
300:60 |
Same as Applesoft Poke 768,96 |