Commodore A500 Plus Nostalgically Computer
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Model:
A500 Plus
Date:
1991
Category:
Group:
Description:
Information
A500 PLUS SPECIFICATIONS
INTRODUCTION
The A500 Plus is a feature enhanced version of the A500
personal computer.
FEATURES
CPU: 7.16 MHz 68000 NTSC; 7.09 MHz 68000 PAL
Memory: 1 Megabyte standard expandable to 2 ME with addition
of A501 Plus Kickstart ROM: 512K (V2.04)
Mass Storage Memory: Internal, 3.5 inch FDD mounted on the
right side, the same as the A500.
Additional Features: Real Time Clock (on-board) with battery
backup.
APPEARANCE
The A500 Plus appearance shall be the same as the A500. A
new logo plate has been added to distinguish “A500” from
“A500 Plus”. The color is the same light beige as the
current A500.
WHAT’S ADDED
1 Meg on-board memory expandable to 2 Meg.
8375 FAT AGNUS which supports 2 Meg. of Chip RAM
On-board Real Time Clock
8373 ECS Denise
Full ECS support
V2.04 in ROM
CUSTOM CHIPS
The A500 Plus shall contain the same custom chip set as the
A500, except for the 8375 2Meg. FAT AGNUS and 8373 ECS Denise.
SYSTEM I/O EXTERNAL SYSTEM I/O
External floppy, Serial, Parallel, Mouse, Joystick, Stereo
Audio Ports These Ports remain unchanged from their A500
counterparts.
MEMORY MAP
The A500 Plus Memory Map is the same as the A500 Memory Map.
Manual type:
Service Manual
Pages:
53
Size:
2.32 Mbytes (2433778 Bytes)
Language:
english
Revision:
Manual ID:
PN-400420-01
Date:
1991 10 01
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
2017 08 04
MD5:
5715dadb6f79c0939c0ebc49a4391e86
Downloads:
666
Information
SECTION 1 — SPECIFICATIONS
A500 Plus:SPECIFICATIONS ... 1-1
A501 PLUS
SPECIFICATIONS ... 1-2
SECTION 2 — THEORY OF OPERATIONS
AMIGA 500 PLUS MEMORY
MAP ... 2-1
A500 Plus BLOCK
DIAGRAM ... 2-2
THEORY OF
OPERATION ... 2-3
8375 AGNUS
2MEG ... 2-7
8373 DENISE HI
RES ... 2-11
8364
PAULA ... 2-12
GARY ... 2-13
SECTION 3 — TROUBLESHOOTING
MAIN ASSEMBLY
DIAGRAM ... 3-1
SECTION 4 — PARTS
A500 Plus PCB ASSEMBLY
312812 ... 4-1
A500 Plus SHIPPING
ASSEMBLIES ... 4-2
A500 Plus MAJOR
ASSEMBLIES ... 4-3
A500 Plus PCB
COMPONENTS ... 4-4
A501 PLUS SHIPPING
ASSEMBLIES ... 4-5
A501 PLUS MAJOR
ASSEMBLIES ... 4-6
A501 PLUS PCB
COMPONENTS ... 4-7
SECTION 5 — SCHEMATICS
A500 Plus SCHEMATIC #312813, REV.
1 ... 5-1
A501 PLUS SCHEMATIC #363835, REV.
0 ... 5-11