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
front 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
PAK-68 with SRAM module, front side
front side
back side
front 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
PAK/3-030, back side
PAK/3-030, front side
FRAK30, back side
FRAK30, front side