GVP (Great Valley Products): A500 HD+

GVP (Great Valley Products): A500 HD+
GVP (Great Valley Products): A500 HD8+

Connection: Seitlicher Expansion Slot

A500 HD8+

A500 HD8+ with PSU

A500 HD+ with PSU

A500 HD+

A500 HD+, Top view

A500 HD+, Rear view

Hi Res Version, A500 HD8+ - bytes
Hi Res Version, A500 HD8+ with PSU - bytes
Image showing inside the unit - bytes
Image of Rev 6 motherboard - bytes
Hi Res Version, A500 HD+ with PSU - bytes
Image showing Box - bytes
Hi Res Version, A500 HD+ - bytes
Hi Res Version, A500 HD+, Top view - bytes
Hi Res Version, A500 HD+, Rear view - bytes
Image showing left side - bytes
Image showing right side - bytes
Image showing PSU - bytes

The HD8+ is a SCSI controller which connects to the side expansion slot of the A500/+. The HD8+ has 4 x 30-pin SIMM sockets that can utilize 1Mx8 or 4Mx8 SIMM modules. Versions of this unit may exist which use the special 32pin GVP SIMM32 SIMMs instead of the standard 30pin SIMMS, but this has not been confirmed.

Combination eight (8) megabyte, zero-waitstate, FastRAM controller and ANSI XT3T9.2 compatible SCSI interface.
High performance DMA transfers to and from hard-disk.
SCSI data transfer rates of up to 3.58MB/sec.
Auto-configs both Fast RAM and SCSI interface.
Internal 50-pin SCSI connector.
External 25-pin SCSI connector (DB25).

Memory	SIMM Location	J5	J6	J7	J8	J9	J12
0	None	OFF	OFF	ON	ON	OFF	Front
2	CN9-CN10	OFF	ON	OFF	ON	OFF	Front
4	CN9-CN12	ON	OFF	OFF	ON	OFF	Front
8	CN9-CN10	ON	OFF	OFF	OFF	ON	Rear

Power Connector Pinout:



Looking at the back of the unit:

   1     3
    4   5
      2

1  Earth Ground
2  Signal Ground (5V ground)
3  +5V RED
4  WHITE (not connected)
5  +12V BROWN

Contributions to this page by:
Claudio Fernandez, Konrad Popp, Mario Misic, NicDouille, Olivier Anguille, RiWa & Friends

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