MediaWiki:Sitenotice:
2024-03-02: The wiki ran out of disk space, so things were not working. This has been resolved by adding another 5GB of quota ;-) Thanks to Tim Lindner for reporting the issues. 2020-05-17: If a page gives you an error about some revision not being found, just EDIT the page and the old page should appear in the editor. If it does, just SAVE that and the page should be restored. OS-9 Al (talk) 12:22, 17 May 2020 (CDT)

Color Computer 2 Memory Map

From CoCopedia - The Tandy/Radio Shack Color Computer Wiki
Jump to navigation Jump to search

Overview

Start address End address Size (KB) Contents
0000 03FF 1 System Use
0400 05FF 0,5 Text screen memory
0600 7FFF Free RAM (depending on use of graphics pages or DECB)
0600 0BFF 1,5 Graphics page 1 Pmode 3/4 page 1
0C00 11FF 1,5 Graphics page 2
1200 17FF 1,5 Graphics page 3
1800 1DFF 1,5 Graphics page 4
0600 18CE 4 DECB Use (CONFLICT WITH GRAPHICS PAGES 1-4)
1E00 23FF 1,5 Graphics page 5 Pmode 3/4 page 2
2400 29FF 1,5 Graphics page 6
2A00 2FFF 1,5 Graphics page 7
3000 35FF 1,5 Graphics page 8
8000 9FFF 8 Extended BASIC ROM
A000 BFFF 8 COLOR BASIC ROM
C000 D800 6 Disk BASIC ROM
C000 FEEF 16 Cartridge ROM
FF00 FFFF 0,25 Input/Output Area

Input/Output Area

Start address End address Contents / Function
FF00 FF1F Peripheral Interface Adapter (PIA) 0
FF00 PIA0 data port A: Keyboard rows & joystick button
FF01 Horizontal sync & interrupt control
FF02 Keyboard columns
FF03 Vertical sync control
FF04 ? ?
FF20 FF3F Peripheral Interface Adapter (PIA) 1
FF20 PIA1 data port A: sound/cassette/RS-232 output/input
FF23 PIA1 control port B: FIRQ Address
FF40 PIA1 ...