Manufacturer “HK-Computer”
13 expansions in database
			| ManufacturerHK-Computer, Germany | Date1989 | Amigaany Amiga 
 | Interfacefloppy port 
 | 
		
 
  - allows attaching external floppy drives without daisy chaining them
  
- three DB23 floppy ports
  
- selector switches for every port
 
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  			| ManufacturerHK-Computer, Germany | Date1991 | AmigaA500 
 | Interfacetrapdoor slot, Gary socket 
 | 
		
 
  - four ZIP sockets with 2 MB RAM
  
- 1M×4, 70 - 80 ns ZIPs
  
- can be configured as 512 kB Chip + 2 MB Fast RAM or as 1 MB Chip and 1.5 MB Fast RAM
  
- battery backed up clock
  
- the main board connects to the trapdoor slot, the adaptor board connects to the Gary's socket
 
 				 Advert (DE)
Advert (DE)
1992-02 Advert (DE)
Advert (DE)
1992-06 
  	 
  - 2 MB Fast RAM expansion
  
- connects to the 40 pin expansion header of the Commodore A570
  
- four 1M×4 chips soldered on board
  
- nothing else is required to be on the board as the multiplexing circuit is already in the A570
 
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  			| ManufacturerHK-Computer, Germany | Date1991 | AmigaA500 
 | Interfacetrapdoor slot 
 | 
		
 
  - four DIP sockets with 512 kB RAM
  
- 256k×4 (514256), 70 - 80 ns DIPs
  
- battery backed up clock
  
   - clock write protection
   
- clock disable jumper
  
 
- memory disable jumper
  
- connects to the trapdoor slot
 
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			 Advert (DE)
Advert (DE)
1991-09 Advert (DE)
Advert (DE)
1992-02 Advert (DE)
Advert (DE)
1992-06 
  			| ManufacturerHK-Computer, Germany | Date1991 | AmigaA2000 
 | InterfaceZorro II 
 | Autoconfig ID56 / 3 
 | 
		
RAM Expansion
  - 16 ZIP sockets accept 8 MB RAM
- supports 256k×4 and 1M×4 ZIPs
- accepts ZIPs in groups of four giving 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 6.5, 8 MB configurations
- disable switch
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			 Advert (DE)
Advert (DE)
1992-02 Advert (DE)
Advert (DE)
1992-06 
  			| ManufacturerHK-Computer, Germany | Date1991 | AmigaA500 
 | Interface68000 socket 
 | 
		
 
  - 16 ZIP sockets accept 8 MB RAM
  
- supports 256k×4 and 1M×4 ZIPs
  
- accepts ZIPs in groups of four giving 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 6.5, 8 MB configurations
  
- connects to the 68000 socket - the 68000 is replaced onto the board
 
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			 Advert (DE)
Advert (DE)
1991-09 Advert (DE)
Advert (DE)
1992-02 Advert (DE)
Advert (DE)
1992-06 
  			| ManufacturerHK-Computer, Germany | Date1993 | AmigaA1200 
 | Interfacetrapdoor slot 
 | 
		
 
  - optional PLCC or PGA FPU up to 68882 @ 50 MHz
  
- one 72 pin SIMM socket accepts 8 MB RAM
  
- supports 1, 2, 4, 8 MB SIMMs
  
- does not conflict with the PCMCIA address space
  
- battery backed up clock
 
  			| ManufacturerHK-Computer, Germany | Date1991 | AmigaA2000, A3000, A4000 
 | InterfaceZorro II 
 | Autoconfig ID6148 / 0 
 | 
		
 
  - 64 DIP sockets accept 8 MB RAM
  
- supports 2, 4 or 8 MB configurations with autoconfig
  
- the 6 MB configuration works only with autoconfig disabled - the memory has to be added by software
  
- accepts 1M×1, 70 - 120 ns DIPs
  
- running a 6 MB card together with a BridgeBoard requires replacing a PAL
  
- not compatible with A2000-A motherboards
 
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			 Advert (DE)
Advert (DE)
1991-09 Advert (DE)
Advert (DE)
1992-02 Advert (DE)
Advert (DE)
1992-06 
  			| ManufacturerHK-Computer, Germany | Date1994 | AmigaA2000, A3000, A4000 
 | InterfaceZorro II 
 | Autoconfig ID2113 / 227 
 | 
		
 serial and parallel interface
  - up to two bidirectional parallel ports
  
- up to four serial ports - one 25 pin and three 9 pin ports
 
revision below 2.7
  - max 57600 bps transfer speed
  
- each two ports must be used at the same transfer speed when using rates above 19200 bps (below mixing is possible)
  
- guaranteed transfer rates: 38400 bps on 68000, 57600 on 68020
  
- hardware bug: lines for DSR and CD are switched on port SER3 - this is corrected by software
 
revision 2.7 or above
  - max 115200 bps transfer speed (replacing an oscillator is necessary)
  
- each two ports must be used at the same transfer speed when using rates above 57600 bps (below mixing is possible)
  
- needs at least driver software v1.3
 
notes
  - serial drivers / buffers are socketed
  
- if a serial driver is destroyed by overcharge replacing the appropriate 1488 and 1489 chip solves the problem
  
- driver software v2.0 or above requires Kickstart 2.04
  
- MIDI compatible
 
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  	 SCSI controller
  - connects to the A570 rear expansion port
  
- DB25 external SCSI connector
  
- uses DMA transfers - the DMA circuit is already built in the CD controller of the A570
  
- disable jumper
 
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  			| ManufacturerHK-Computer, Germany | Date1992 | AmigaA2000, A3000, A4000 
 | InterfaceZorro II 
 | Autoconfig ID41233 / 1 56 / 3
 
 | 
		
SCSI 2 controller
	- uses polled I/O, not DMA transfer
- place for a 3.5" hard disk on the card but no power connector is mounted on the board
- 50 pin internal header
- DB25 external connector
- hard disk activity LED connector
- RDB compatible
- driver software is written by Jürgen Kommos
memory
	- sixteen ZIP sockets accept 8 MB RAM
- supports 1M×4, 70 or 80 ns ZIPs
- accepts ZIPs in groups of four giving 2, 4, 6, 8 MB configurations
- memory is not continuous but autoconfigured into 2 MB chunks
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			 Advert (DE)
Advert (DE)
1992-11 Advert (DE)
Advert (DE)
1992-11 
  			| ManufacturerHK-Computer, Germany | AmigaA500 
 | Interfacetrapdoor slot 
 | 
		
 
  - 512 kB RAM
- four 256k×4 DRAM chips
- connects to the trapdoor slot
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  			| ManufacturerHK-Computer, Germany | Date1990 | AmigaA2000, A3000, A4000 
 | InterfaceZorro II 
 | Autoconfig ID41233 / 1 
 | 
		
 SCSI 2 controller
  - place for a 3.5" hard disk on the card
  
- 50 pin internal header
  
- autobootROM (vector.device) - autobooting requires at least Kickstart 1.3
  
- Vector SCSI is RDB compatible, Professional SCSI is not
  
- disable jumper
  
- does not work with some Seagate and Fujitsu hard disks
  
- developed by W. Heinen and Jürgen Kommos
 
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			 Advert (DE)
Advert (DE)
1991-09