![]() The A4000T uses a totally separate motherboard. It is easy to assume that the A4000T is simply the same motherboard as the desktop A4000, but this is not the case. The A4000T is arguably the best Amiga model ever made. North American units were manufactured in West Chester, Pensylvania whilst European units were assembled in Bensheim, Germany. The A4000T from Commodore only saw a limited production of machines (estimated at 200) before they went bust in 1994. Two terminals are also available for attaching an external battery NOTE: These specifcations apply to the A4000T made by Commodore, and do not necessarily apply to the A4000T made by Amiga Technologies.Ģ x AGA Video Slots (both inline with Zorro slots)Ĥ x Inactive 16bit ISA slots (3 inline with Zorro slots)ĥ x 5.25" (3 Horiztonal, 2 Vertical, all with faceplates) Also requires U860 and U152Īlices supplies MA10 for 8MB CHIP (Non Functional and never will be!) Internal DF1: and DF2:, External DF0: and DF3: Internal DF1: and DF0:, External DF2: and DF3: No second internal floppy or second internal floppy is 1.76MB Commodore had planned to give the A4000 the ability to address up to 8MB of CHIP and indeed a jumper can be found on the motherboard which would have been used for this purpose, but the jumper actually does nothing. As all A4000s were supplied with 2MB CHIP by default, the fifth SIMM slot was rather useless because the AGA chipset could not address more than 2MB of CHIP. In addition to this Commodore also removed the fifth SIMM slot which is reserved for CHIP ram and soldered the CHIP directly to the motherboard. It still contained the CPU fast slot however for attaching accelerators. Most A4000's were shipped with a separate processor card connected to the CPU fast slot however the A4000-CR had an 030 soldered directly to the motherboard therefore a processor card was not required. It was an attempt to reduce the cost of manufacturing the A4000. A4000's with a Rev D motherboard differ slightly from the other versions and are dubbed "A4000-CR" which stands for "Cost Reduced". Some A4000's may have been released which contained 020 CPU's, as the A3630 that was supplied with the A4000 can also be fitted with an 020 and there is one claim that Commodore donated an 020 based A4000 as a prize at The Gathering '92. Like most big box Amigas the A4000 also has a keylock which effectively works by removing power from the keyboard and mouse rendering the machine fairly useless. Unlike most other big box Amigas the A4000 uses a PS/2 style keyboard connector, however the signals and keyboard clock that the A4000 uses are not the same as the PC so you cannot use PC PS/2 keyboards. Significant improvements were however, made to the Zorro III bus design particularly with regards to DMA and bus mastering that fixed many problems which plagued the A3000, providing you had a Rev 11 buster. Although it uses a newer ROM and Chipset, the onboard SCSI-II had been replaced with a significantly slower IDE Controller (PIO Mode 0) and it did not contain the scandoubling hardware for attaching PC VGA type monitors which the A3000 did. The A4000 was seen as a disappointment to many after the reception that the A3000 received. The A4000 is often seen as the big brother of the A1200 but was targetted more at productivity users, rather than gamers. Yes, uses "Barrel" shaped batteries, except Rev D which uses "Coin" shaped batteries. Note: Some machines were shipped with single height drives, others had 1.5 times height drives. ![]() Note: Some machines were supplied with 1.5 times height floppy drives, in this case the second externally accessible 3.5" bay is fairly useless as it's only half height. Optional, but not standard (030 versions)ģ x inactive 16bit ISA slots (inline with Zorro)Ĥ x 72pin SIMM slots (A4000-CR only, 2MB Chip is surface mounted)ĥ x 72pin SIMM slots (one slot is reserved for Chip RAM)ġ x 5.25" (with faceplate, None for Black A4000) Case (on motherboard for A4000-CR via a Commodore via Commodore A3640
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