Editing Apple I (section)

=== Memory map ===
{| class="wikitable"
|+
!Address
!Size 
!Description
!
|-
|0x0000 - 0x0023
|36 Bytes
|RAM
| rowspan="6" |4K systems
(minimal system, cannot load [[Integer BASIC|wozbasic]]))
|-
|0x0024 - 0x002B
|8 Bytes
|[[Machine code monitor|wozmon]] variables
|-
|0x002C - 0x00FF
|212 Bytes
|RAM
|-
|0x0100 - 0x01FF
|256 Bytes
|6502 processor stack
|-
|0x0200 - 0x027F
|128 Bytes
|wozmon keyboard input buffer
|-
|0x0280 - 0x0FFF
|3456 Bytes
|RAM
|-
|0x1000 - 0xC027
|
|Unused
|User expandable RAM / [[Input/output|IO]]
|-
|0xC028
|1 Byte
|[[Apple I#Apple Cassette Interface expansion|ACI]] port to write to cassette
|
|-
|0xC029 - 0xC0FF
|
|Unused
|User expandable RAM / IO
|-
|0xC100 - 0xC1FF
|256 Bytes
|ACI ROM
|When ACI card is inserted
|-
|0xC200 - 0xD00F
|
|Unused
|User expandable RAM / IO
|-
|0xD010 - 0xD013
|4 Bytes
|PIA (Peripheral Interface Adapter)
|Keyboard and Display
|-
|0xD014 - 0xDFFF
|
|Unused
|User expandable RAM / IO
|-
|0xE000 - 0xEFFF
|4Ki (4096 Bytes)
|RAM
|8K systems
(standard system, can load wozbasic)
|-
|0xF000 - 0xFEFF
|
|Unused
|User expandable RAM / IO
|-
|0xFF00 - 0xFFFF
|256 Bytes
|PROM (wozmon)
|Programmable read-only memory
|}
[[File:Apple-1-wozmon-ready-prompt.gif|alt=A backlash character at the top-left of the screen and a blinking ampersand character below it|thumb|208x208px|The Apple-1 system monitor ready prompt]]