A2630
Company
Commodore, USA
Date
1989
Amiga
A2000
Interface
CPU slot
Autoconfig ID
514 / 81
    memory
  • 2 or 4 MB RAM on board
  • capable of DMA, but does not support burst mode
  • 16 or 32 256k×4 page mode ZIPs 80-100 ns
  • expansion slot for third party RAM boards
  • RAM can be disabled or autoconfigured by setting a jumper
    notes
  • jumper selects whether autoboot into AmigaDOS or UNIX
  • 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
  • in 68000 fallback mode the RAM is still available
    jumper settings
    J301 -RAM size: ON - 2 MB, OFF - 4 MB
    J302 -B2000: ON - german A2000
    J303 -RAM autoconfig: ON - disabled
    J304 -OS: ON - UNIX, OFF - AmigaOS
  • rev 6
    • J202 -FPU clock: ON - same as CPU clock
    J200 -reserved
  • rev 9
    • J202 -FPU clock: 1-2 - same as CPU clock, 2-3 - from oscillator U203
Photos
Commodore A2630 - Rev 6 front side
Rev 6, front side
Commodore A2630 - Rev 6 back side
Rev 6, back side
Commodore A2630 - Rev 9 front side
Rev 9, front side
Commodore A2630 - Rev 9 back side
Rev 9, back side
Manual
Benchmark