A2620 2MB

A2620 2MB

Company

Commodore, USA

Date

1988

Amiga

A2000

Interface

CPU slot

Autoconfig ID

514 / 80

processor

  • 68020 @ 14 MHz, synchronous with the motherboard
  • 68851 memory management unit
  • factory installed 68881 @ 14 MHz, supports FPUs up to 68882 @ 25 MHz
  • can be upgraded to 68030 with the Harms Professinal-Pack 030 board

memory

  • 2 or 4 MB 32 bit RAM
  • 16 or 32 256k×4 page mode ZIPs 80-100 ns
  • not expandable
  • RAM can be disabled or autoconfigured by setting a jumper

notes

  • the first accelerator board for the A2000
  • boot ROMs below rev 6 are incompatible with Kickstart 2.0 and above
    • the ROM address space overlaps the upper 256 kB of the 512 kB Kickstart ROMs (Kickstart 1.3 is 256 kB only)
    • by the time AmigaOS loads, the boot ROMs are supposed to be off but due to a bug in the A26x0 ROM code they remain active, causing an address space collision
    • fitting a rev 6 or 7 ROM pair solves the problem
    • some boards are reported being incompatible with the newer ROMs either
  • in 68000 fallback mode the RAM is still available

recapped with Rubycon brand 105° type