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---- Amiga 1000 ----
Amiga-Online! >> Amiga Info >> Amiga Models >> Amiga 1000

Launched: July 23, 1985

Commodore launched the Commodore Amiga in a grandiose show at the Lincoln Center in New York on July 23, 1985. The machine itself was based upon the earlier Lorraine project. The unit went on sale a few months later, retailing at $1295.00 US dollars.
The company were pressured by Atari to launch the Commodore Amiga ahead of their original schedule . The Tramiel-led company had attempted to buy the Amiga technology but had been forced to develop their own 68000 machine based upon off-the-shelf parts. In spite of a shorter development time, the Atari 520ST beat the Commodore Amiga to the market by several months. As a result, Amiga Workbench 1.1 (the Amiga disk based OS) was buggy and prone to crashes.

At the time the Commodore Amiga was far in advance of its competitors: the IBM PC market was using a 16 colour CGA display and the Apple Macintosh was limited to a B/W display. These specifications are taken from the original advertising for the A1000 in the USA. The Atari continued to beat the Amiga in the market for several years, in part, due to Commodore's focus upon the high-end market. It is only when the Amiga 500 was launched that Commodore were able to beat Atari in the home computer market. In 1987 the Commodore Amiga was redubbed the Commodore Amiga 1000.

* Processor *

68000 @ 7 MHz

The A1000 has a socketed 68000 @ 7.09 MHz (PAL) or 7.16 MHz (NTSC). Upgrading the processor requires the use of a processor board. Many boards designed for the A500 works perfectly in the A1000, either connected to the side expansion port or to the 68000's socket.

* Memory *

up to 1 MB Chip RAM
up to 32 MB Fast RAM on processor cards
up to 8 MB Fast RAM on side expansion cards

The A1000 has 256 kB Chip RAM soldered to its motherboard which can be expanded to 512 kB with a memory expansion card.
Fast RAM can be added either via the side expansion connector or via processor boards.

* Custom chips *

Agnus - OCS display controller
Denise - OCS graphics coprocessor
Paula - audio and I/O controller
Gary - system address decoder
Kickstart ROM

The A1000's OCS chip set supports the following screen modes:
Low High
PAL, non-interlaced
PAL, interlaced
NTSC, non-interlaced
NTSC, interlaced
320256
320512
320200
320400
640256
640512
640200
640400
50 Hz, 15.75 kHz
50 Hz, 15.75 kHz
60 Hz, 15.75 kHz
60 Hz, 15.75 kHz
The A1000 supports either PAL or NTSC screen modes, not both.
Low resolution screen modes offer up to 32 colours from a palette of 4096, and 4096 in HAM mode. High resolution screen modes offer 16 colours from 4096.
4 channel stereo 8 bit audio output with frequencies up to 28 kHz.

* Expansion slots *

1 side expansion slot

It is the same 86 pin connector as the one later utilized on the A500. Many A500 expansion boards work flawlessly however the units are the wrong way round with its port on the front.

* Interfaces *

1 serial DB25 female, RS232
1 parallel DB25 male, Centronics
1 video DB23 male, analog RGB
1 composite, black & white
2 mouse/game DB9 male
2 stereo audio RCA jack
1 keyboard RJ12
1 external floppy DB23 female
1 internal floppy 34 pin header

The floppy drive controller supports up to four devices - one attached to the internal floppy header and three connected to the external floppy port. Both double and high density disk drives are supported.
A 880 kB double density floppy disk drive is built into the A1000.