Manufacturer “C't”
4 expansions in database
Manufacturer
C't, Germany
Date
1989
Amiga
A500, A1000
A2000, A3000, A4000

-
-
Interface
side expansion port
Zorro II
    MFM controller
  • supports up to two ST506 hard disks (OMTI)
  • does not autoconfig - the controller address is set by four DIP switches: $810000 (ON ON ON OFF) or $8F0000 (OFF OFF OFF OFF)
  • different drivers can be used, c't suggests the MacroSystem AutoBootSystem (a separate autoboot card)
  • supported by MacroSystem's Medusa Atari ST emulator
  • A1000 and A500 versions connect to the side expansion port
  • the card was manufactured by MacroSystem
C't OMTI-Adapter -  front side
front side
C't OMTI-Adapter -  back side
back side

Manufacturer
C't, Germany
Date
1987
Amiga
A500
Interface
68000 socket
  • Prozessor Austausch Karte - Processor Exchange Board
  • developed by the editors of the german computer magazine c't
  • schematics has been fully published in the magazine
  • designed to emulate the MC68000 processor bus interface at best, so it can be used in Ataris and Macs as well
    processor
  • 68020 @ 12 / 16 MHz, PGA (asynchronous to the motherboard)
  • optional 68881 @ 12 / 16 MHz, PGA - runs at the same speed as the CPU
    memory
  • optional daughter board with four 32k×8 ROM or SRAM chips
  • two boards can be stacked on each other for 256 kB ROM / SRAM total
    notes
  • plugs into the 68000's socket
  • no 68000 fallback mode
C't PAK-68 - PAK-68 with SRAM module  front side
PAK-68 with SRAM module, front side
C't PAK-68 -  front side
front side
C't PAK-68 -  back side
back side
C't PAK-68 -  front side
front side
C't PAK-68 -  back side
back side

Manufacturer
C't, Germany
Date
1991
Amiga
A500
Interface
68000 socket
  • successor of the original PAK-68 (Prozessor Austausch Karte - Processor Exchange Board)
  • developed by the editors of the german computer magazine c't
  • schematics has been fully published in the magazine
  • can be used in 68000 based Ataris and Macs as well
  • less error prone design - processing flow with state machines
  • the discrete logic had been put into GALs, allowing easy reconfiguration in case of timing changes
  • the GAL based layout is smaller, making room for ROM/RAM sockets which were located on piggy-back boards on the old board
    processor
  • 68020 @ 14 / 16 MHz, PGA
  • optional 68881 or 68882 @ 14 / 16 MHz, PGA - runs at the same speed as the CPU
    memory
  • four 32 pin sockets for up to 512 kB ROM / SRAM
  • when occupied with ROMs, access to OS ROM is 32 bit wide
  • SRAMs with 100ns or faster access speed can also be fitted but an additional decoder GAL is necessary
  • ROM access can be sped up by 40% by setting a jumper, which disables ROM synchronisation to the 8 MHz clock
    notes
  • plugs into the 68000's socket
  • either a 68000 has to be put on top of the board or an additional GAL has to be installed

Manufacturer
C't, Germany
Date
1994
Amiga
A500
Interface
68000 socket
  • third generation of the Prozessor Austausch Karte - Processor Exchange Board
  • developed by the editors of the german computer magazine c't
  • schematics and GAL equations has been fully published in the magazine
  • designed to emulate the MC68000 processor bus interface at best, so it can be used in Ataris and Macs as well
    processor
  • PAK-68/3-020: 68020
  • PAK-68/3-030: 68030
  • 14.3 MHz (synchronous) or 32 / 36 / 40 MHz (asynchronous) - could be run in either modes, but requires different GALs
  • optional 68881 or 68882 - runs at the same speed as the CPU
    memory
  • optional 32 kB level 2 cache
  • four EPROM sockets for 32 bit Kickstart access
  • memory expansion is possible for the 030 version only
    notes
  • the 020 and 030 versions have slightly different layout
  • five GALs - there are different GAL sets for each configuration (computer type, CPU type, CPU mode)
  • plugs into the 68000's socket
  • optional 68000 fallback mode - the 68000 can be installed onto the PAK with an additional GAL
C't PAK-68/3 - PAK/3-030  back side
PAK/3-030, back side
C't PAK-68/3 - PAK/3-030  front side
PAK/3-030, front side
C't PAK-68/3 - FRAK30  back side
FRAK30, back side
C't PAK-68/3 - FRAK30  front side
FRAK30, front side