| Initial Address |
End Address |
Description |
Bytes
|
| $0000 |
- |
MMU Control Register |
1
|
| $0001 |
- |
I/O Control Register |
1
|
| $0002 |
$0007 |
Free Zero Page Addresses |
6
|
| $0008 |
$000F |
MMU Control Addresses |
8
|
| $0010 |
$002F |
Free Zero Page Addresses |
32
|
| $0030 |
$003F |
Used Zero Page Addresses for (xx),Y Addressing |
16
|
| $0040 |
$0041 |
Current Address on screen of start of line |
2
|
| $0042 |
$004F |
Avaliable Zero Page Addresses |
14
|
| $0050 |
$00AF |
Number / Floating Point Stack for 16 numbers |
96
|
| $00B0 |
$00EF |
Available Zero Page |
64
|
| $00F0 |
$00FF |
Kernel Arguments in Zero Page* |
16
|
| $0100 |
$01FF |
Hardware Stack of 6502 |
256
|
| $0200 |
$0228 |
Basic mini-Kernel memory |
40
|
| $0229 |
$03FF |
Buffer area by Sound Command in BASIC (available if not using this command) |
470
|
| $0400 |
$041F |
Control Storage first 8 bytes control syntax highlighting |
32
|
| $0420 |
$0814 |
Memory Storage |
1012
|
| $0678
|
$067F
|
Keyboard Buffer (8 keys max)
|
8
|
| $0680
|
$0680
|
Pending key presses in Keyboard Buffer
|
1
|
| $0814 |
$0FFF |
Available Low Memory |
2027
|
| $1000 |
$1FFF |
SuperBASIC Identifier Tables, allocated memory, string vars, stack |
4kb
|
| $2000 |
$77FF |
SuperBASIC Program Tokenized Code (grows Upward) |
22kb
|
| $7800 |
$7FFF |
Top 2k of SuperBASIC Program tokenize code or used for ML routines in low memory |
2kb
|
| $8000 |
$BFFF |
SUPERBASIC CODE |
16kb
|
| $C000 |
$DFFF |
I/O Memory Pages / Underlying Kernel Code (Selectable with I/O control Register) |
8kb
|
| $E000 |
$FFEF |
KERNEL CODE |
8176
|
| $FFF0 |
$FFFF |
Reset Vectors and NMI / IRQ / BRK Vectors |
16
|
| $01:0000 |
$02:2BFF |
Default Memory used by BASIC bitmap graphics |
75kb
|
| $02:2C00 |
$02:7FFF |
Available High Memory |
21kb
|
| $02:8000 |
$02:F000 |
Used for BASIC Cross Development w/PC or MAC (or Available High Memory) |
32k
|
| $03:0000 |
$03:7FFF |
Used for Sprite Data in BASIC |
32kb
|
| $03:8000 |
$03:FFFF |
Unless not running from Flash, Used for ROM Images |
32k
|
| $04:0000 |
$07:DFFF |
Available High Memory |
248kb
|
| $07:E000 |
$07:FFFF |
Being considered to be Reserved for Environmental Variables |
8Kb
|
| $10:0000 |
$13:FFFF |
Cartridge Expanded Memory (addresable only by CPU) |
256kb
|
| $14:0000 |
$1F:FFFF |
Future Expansions? |
768kb
|
