ID #2854

Commodore: A3000T


Rear of A3000T
Rear of A3000T

Inside A3000T
Inside A3000T

Hi Res Version, A3000T - 436K
Image of Rev 6.1 Motherboard - 2741K
Picture of Rev 6.1 Motherboard Image 1 - 2741K
Picture of Rev 6.1 Motherboard Image 2 - 541K
Picture of Rev 6.1 Motherboard Image 3 - 565K
Picture of Rev 6.1 Motherboard Image 4 - 625K
Picture of Rev ?? Motherboard - 110K

Standard Specifications

Case Type: Full Tower
Processor: 030@25Mhz or
040@25Mhz (via Commodore A3640)
MMU: Internal
FPU: 68882@25Mhz (for 030 version)
Internal (for 040 version)
Chipset: ECS (Plus the additional chips Amber, SuperDMAC and Ramsey)
Kickstarts: V2.04
Bus Controller: Super Buster Rev 7
Super Buster Rev 9
Super Buster Rev 11 (not confirmed)
Expansion Slots: 5 x 100pin Zorro III slots
1 x ECS Video Slot (inline with Zorro)
4 x inactive 16bit ISA slots (2 inline with Zorro)
1 x 200pin CPU Fast Slot.
Standard CHIP RAM: 1MB (but supports 2MB)
RAM sockets: ZIP Sockets for Chip RAM
ZIP and DIL sockets for Fast RAM.
Hard Drive Controllers: 1 x SCSI-II Controller
Drive Bays: At least:
2 x 3.5" (2 with floppy faceplates)
3 x 5.25" (3 with faceplates, 2 vertical, 1 horizontal)
Expansion Ports: 1 x 25pin Serial
1 x 25pin Parallel
1 x 23pin RGB Video
1 x 15pin VGA Connector
1 x 23pin External Floppy
2 x 9pin Joystick/Mouse
2 x RCA Audio (Left/Right)
1 x 25pin External SCSI connector
1 x large 5pin DIN Keyboard connector
Floppy Drive: 1 x Internal 880K Floppy Drive (for 030 version)
1 x Internal 1.76MB Drive (for 040 version)
Motherboard Revisions: (Earlier revisions are likely to be A3500 motherboards)
Rev 6.1
Battery Backed Up Clock: Yes, uses "Barrel" shaped battery.

It is easy to assume that the A3000T is the same as the A3000 but shipped in a full tower instead of a desktop case, however the A3000T is infact a totally separate motherboard. The A3000T is a huge machine and probably has the largest motherboard of any Amiga, including the A4000T. It is similar to the A3000 but offers far more expandability. The Zorro and ISA slots are fitted directly onto the motherboard rather than being on a daughterboard (riser card) as they are in the desktop A3000. The A3000T probably has a small amount of NVRAM designed to hold the configuration settings for the SCSI controller which is the same chipset as in the desktop model. The A3000T also has a keylock and has an internal speaker for playing native audio, however external speakers can still be used. The A3000T contains a builtin scandoubler which allows PC type SVGA monitors to display the native NTSC and PAL Amiga screenmodes, which can be disabled with a switch on the rear.

Jumper settings

J100 CLK90 Delay jumper. This Jumper has three positions. In position 1-2 it sets up CLK90 for 25Mhz operation. In Position 2-3 CLK90 is set up for 16Mhz operation. In position 3-4 the EXT90 line drives CLK90, rather than the on-board clock logic.
J102 Board Clock. This jumper has two positions. In position 1-2 the sorce for CPUCLKa and CPUCLKb must be EXTCPU. In position 2-3 it shorts the 68030 and local bus clock sources, such that CPUCLKa and CPUCLKb and CLK30 all all derive from the same source, which is either EXTCPU or the clock based on the local logic, depending on the state of J104.
J103 FPU Chip select jumper. This jumper has three positions. In position 1-2 it disables the onboard FPU. In position 2-3 it causes the 68030 to get F-line traps instead of the FPU transaction and in position 3-4 it enables the onboard FPU.
J104 CPU CLOCK. This jumper has two positions. In position 1-2 the source for CLK30 is derived from the on-board clock generator. In position 2-3 the source for CLK30 must come from EXTCLK by by way of J102.
J105 System clock disable. In the 2-3 position this jumper allows DIS_CLKS line from the local bus slot to operate normally. In the 1-2 position it forces DIS_CLKS high (asserted) disabling on-board system clock generation.
J106 CLK90 short jumper. In the 2-3 position there are two versions of CLK90. The system normally runs this way. In the 1-2 position the two CLK90 lines are shorted toghether to allow a single line to source both clocks.
J107 68030 Clock disable. In the 2-3 position this jumper allows the DIS_CLK30 line from the local bus slot to operate normally. In the 1-2 position it forces DIS_CLK30 high (asserted) disabling on-board 68030 clock generation.

Contributions to this page by:
Alexander Holland, Greg Scott (National Amiga), Peter Holy, RiWa & Friends

Letzte Änderung des Artikels: 2009-01-24 18:44
Revision: 1.0

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