The Amiga 4000, a desktop computer, was a technical evolution of the Amiga 3000 and was introduced in late 1992. There were different versions of the computer. First was a 25 MHz faster processor, the Motorola 68040, the basic equipment. A little later, "savings " versions with a 25- MHz 68030 followed (this model was then Amiga 4000/EC30 baptized ) and a 68LC040. Even an Amiga 4000 with a 68060 processor was planned; this model called Amiga 4000/060, however, was no longer delivered in Germany. In the U.S. Quikpak but not delivered, the U.S. sales of the company Amiga Inc. Amiga 4000T with a 68060 from, because of the renewed bankruptcy in Europe.
The great innovation of the Amiga 4000 was ( in Germany known as AA ), which could provide very good results for that time, the new graphics chipset AGA.
The Amiga 4000T ( in tower chassis ) was published in 1993 and was the last model that could bring Commodore on the market before the liquidation. Only 200 copies to have been delivered at that time. Amiga Technologies put the Amiga 4000T later virtually unchanged scratch.
- CPU: Motorola 68EC030 with 25 MHz or 25 MHz 68LC040 with ( EC = without MMU and FPU / LC = without FPU), and 68040 with FPU / MMU
- FPU: 68040 In largely integrated, missing commands by software
- Chipset: AGA ( in Germany known as AA )
- ATA interface (name = scsi.device ), the SCSI interface was deleted ( the A4000T but reinstalled )
- 3.5 -inch high-density floppy drive ( Amiga Format 1.76 MB, but only at half the speed of rotation, with the supplied driver compatible with PC - standard 1.44- MB diskette )
- Optional flicker fixer for the use of the AGA (PAL / NTSC) - custom chips with a conventional VGA monitor
- Internally Zorro 3 slots (similar to PCI slots in the PC)
- The CPU was no longer soldered here in the later versions of the A4000 and A4000T directly on the motherboard, but it was located on a separate processor board. This allowed a simple change of the CPU by Turbo cards; other providers also offered dual- CPU board with a PowerPC and a 68040 - or 68060 processor (see PowerUP ).
The onboard existing RAM memory of 2 MB ( chip RAM for the AGA - custom chips and the CPU, in the first platinum version as PS2 plug-in module, later soldered ), by 4 PS2 modules each with 4 MB to a maximum of 16 MB Fast RAM can be expanded (for the CPU).
By Zorro -3 plug-in cards and the RAM is theoretically up to 2 GB expandable, in practice there were only expansion cards with 256 MB of memory. In the existing four Zorro slots an enormous for that time RAM expansion from 1 GB was thus possible to be equipped with four such cards.
- Amiga 4000 in the desktop housing with AmigaOS 3.0 and only IDE interface.
- Amiga 4000T ( Commodore ) in the tower case with AmigaOS 3.1 and additional SCSI-II interface.
- Amiga 4000T ( ESCOM ) in the amended tower case with AmigaOS 3.1 and additional SCSI interface.
Due to the age may now arise the problem that electrolytic capacitors leak and damage the conductors and ICs. Therefore, it is recommended that all owners to replace them.
The desktop model of the standard soldered battery should be removed as soon as possible as this due to aging expires. By leaking battery acid, the board and all the surrounding components are severely damaged. If the battery is already expired, the motherboard must be set professionally repaired. A superficial cleaning is not enough, because the battery acid is run in 99% of cases under the components and RAM sockets, causing it more damage.