Amiga 1200

Picture of A1200

Picture of A1200 Motherboard (Rev 1A)

Download High Resolution Pictures
A1200 Revision 1A Motherboard (1204x616)
A1200 Revision 1B Motherboard (1226x622)
A1200 Revision 2B Motherboard (1206x620)
-Thanks to Holger Hesselbarth for the Motherboard pictures

KICKSTARTS:
3.0 All C= Amiga 1200's shipped with 3.0 ROMs
3.1 This is available as an upgrade to Commodore A1200's.

ROM chips are a pair of 40 pin DIPs.

CPU:
68020 at 14MHz

FPU:
Some C= A1200's shipped in the USA have been rumoured to have 68882's on the motherboard.

CHIPS:
Lisa
Alice
Paula - Standard Paula
Budgie

RAM:
CHIP RAM 2 megabytes on the motherboard
FAST RAM None.

PORTS:
15KHz Video
External Disk drive
Parallel Port
Serial Port
Mouse/Joystick ports
Left and Right RCA Audio

SLOTS:
1 PCMCIA Type-II Slot on the left side
1 Trapdoor Expansion slot on the bottom for Accelerator/RAM

MOTHERBOARD REVISIONS:

REV 0
Engineering Prototype (13/3/92)

REV 1
Advanced Engineering Prototype (29/06/92)

REV 1A
Initital Commodore Release (9/9/92)

REV 1B
Revised Release (13/11/92)

REV 1D.4
Budgie REV -01
Remove E123C and E125C from the A1200 motherboard
Budgie REV -02
Remove E123C and E125C from the A1200 motherboard
Remove XR358 470 ohm pull-up resistor
Add 470 ohm pull up resistor at pin 43 of U, ie the Alice chip

REV 2B
Budgie REV -01 and -02
Remove E123C and E125C from the A1200 motherboard
Add 470 ohm pull-up at pin 43 of U2, ie the Alice chip
Change R118 from 470 ohm to 220 ohm

(more, unknown)

The A1200 comes with a rather poorly rated power supply of only 23Watts. This is often not enough to power the system when a lot of peripherals are connected so a power supply of a higher rating is recommended.


Thanks to Greg Scott (National Amiga)

A1200 Schematics
PAGE 1 = Jumpers, Connectors, Signals, Revision History
PAGE 2 = Processor and Custom Chip Interfaces and Signals
PAGE 3 = Budgie and DRAM Interface
PAGE 4 = Lisa and Video DAC Interface
PAGE 5 = Paula, Audio Filters and Mouse and Joystick Interfaces
PAGE 6 = Video and Audio Decoupling
PAGE 7 = CIAs (VIAs) RS232 and Parallel Port Interface
PAGE 8 = Floppy Controller and Gayle Schematics
PAGE 9 = Keyboard MPU
PAGE 10 = 16bit, 32bit, RTC and Optional Flash Memory Schematics
PAGE 11 = Gayle and Memory Card
PAGE 12 = Memory Expansion and IDE Controller
PAGE 13 = Expansion Connector, Power Input, Termination and Test Access
PAGE 14 = Gayle Schematic
PAGE 15 = Alice Schematic
PAGE 16 = Lisa Schematic
PAGE 17 = A1200 System Block Diagram
All files in the archive are standard IFF ILBM Images
Download A1200 Schematics
Thanks to Jaroslaw Kunert