GVP (Great Valley Products): A500 HD+
GVP (Great Valley Products): A500 HD8+
Connection: Seitlicher Expansion Slot

A500 HD8+
A500 HD8+

A500 HD8+ with PSU
A500 HD8+ with PSU

A500 HD+ with PSU
A500 HD+ with PSU

A500 HD+
A500 HD+

A500 HD+, Top view
A500 HD+, Top view

A500 HD+, Rear view
A500 HD+, Rear view

Hi Res Version, A500 HD8+ - 37K
Hi Res Version, A500 HD8+ with PSU - 44K
Image showing inside the unit - 188K
Image of Rev 6 motherboard - 1102K
Hi Res Version, A500 HD+ with PSU - 388K
Image showing Box - 682K
Hi Res Version, A500 HD+ - 252K
Hi Res Version, A500 HD+, Top view - 402K
Hi Res Version, A500 HD+, Rear view - 234K
Image showing left side - 149K
Image showing right side - 158K
Image showing PSU - 177K

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.

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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