Commodore 64 - Memory Architecture

Memory architecture
Commodore-64 Architecture Map
CHARACTERSET_
(bit 2 ol $0001)
0 = CHAR ROM
1 = I/O ROM/RAM
VIC II Chip sees
this 16k block
on power-up
JE000
SIX'OO
SD800
$1)000
$8000
(32768)
$4000
(16384)
$2000
(8192)
$0800
$0400
4K RAM
— (49152) —
BASIC
INTERPRETER
ROM
------ (40960) -------
BASIC
User RAM
(38912 Bytes)
-------- (2048) ----------
Screen (IK)
------- (1024) ---------
Workspace (1K)
Professor Keg($0/1)
8K HI RAM
(Oil 1 ol $0001)
0 - RAM
1 = KERNALROM
4K RAM
maps to $D000 when
bits 0 & 1 ol $0001 - 0
8K LO RAM
(bit 0 ol $0001)
0 = RAM
1 = BASIC ROM
EXROM
8K ROM Cartridge
maps here
HI-RES Screen
maps here
E
HI RES Colour Table
51