FatTrapper
Manufacturer
Spirit Technology, USA
Date
1990
Amiga
A500
Interface
trapdoor slot, CPU slot
    Memory Expansion
  • provides up to 3.5 MByte FastRAM and 512 kByte ChipRAM
  • memory board provides 32 DIP sockets
  • supports 256k×4 (414256), <150 ns DIPs
  • accepts DIPs in groups of four giving 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4 MB configurations
  • when installing RAM, the chips have to be installed starting from bank 1 up to bank 8 - the specific sockets (U3 - U34) for each bank are mentioned in the manual
  • supports Fat Agnus and Fatter Agnus (ECS Agnus) - each needs a specific PAL chip in socket U3 on the CPU board ('468' marking - Fat Agnus, '4468' marking - Fatter Agnus)
  • only 1.5 MB or 2 MB RAM is autoconfigured (depending on Agnus revision), the remaining memory needs to be added via AddTrap utility
  • compatible with Kickstart 1.2, here only 512 kByte ChipRAM is autoconfigured (bank 1) - as with Kickstart ≥1.3, the remaining memory needs to be added via AddTrap utility
  • no disable switch
  • battery backed up clock
  • solderless installation
  • the memory board connects to the trapdoor slot
  • the adapter board connects to 68000 CPU socket, the CPU is replaced onto the board
  • both boards are interconnected with a 38cm ribbon cable, allowing upgrading the RAM board without dissassembly of the Amiga
  • current consumption <400mA
    Memory Board Switch Settings
    SwitchSetting
    1ON - enables specific memory banks for Fat Agnus (banks 4 - 8) and Fatter Agnus (banks 5 - 8)
    OFF - no memory installed
    2ON - enables specific memory banks for Fat Agnus (banks 1 - 3) and Fatter Agnus (banks 2 - 4)
    OFF - no memory installed
    3ON - Kickstart 1.3
    OFF - Kickstart 1.2
    4not used
    5ON - Fat Agnus
    OFF - Fatter Agnus (ECS Agnus)
Manual
Driver / Installation Disk
Vintage Advert

Advert (US)
1990-11

Advert (US)
1990-12

Advert (SE)
1990-04