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SuperBASIC Memory Map
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=== Memory Map under BASIC === {| class="wikitable sortable" |+ Caption text |- ! 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|| Available Low Memory | 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|| Available High Memory | 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|| Available High Memory | Unless not running from Flash, Used for ROM Images|| 32k |- | $04:0000|| $07:DFFF|| Available High Memory || 248kb |- | $07:E000|| $07:FFFF|| Available High Memory | 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 |}
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