Old cache memory as a "base" for GVP memory

rkauer · 21 November 2008, 20:33

Reached in my hands two old cache memory little boards. I noticed the "strange" pinout of 'em and decide to count the pin number...

64 pins?

32 on each side of the centre?

Same pitch as a regular SIMM...

What the hell!

Just to confirm, can you guys certificate the GVP memory banks have this exact shape so I can make a pair of those über rare 16Mb SIMM for me?

Of course I know I must de-solder the old cache chips and capacitors, them solder a 72pin SIMM via wires...

@Zetr0: hope this acts as a birthday gift for our friend addicted to hardware pr0n!

coze · 22 November 2008, 00:50

it would be one hell of a coincidence for them to be GVP pinout ... Also the SIMM in the picture has 6 chips, which isn't good omens IMHO.

rkauer · 22 November 2008, 05:37

I know that, mate.

I just want to confirm the pin spacement and distribution. My idea is take the chips and capacitors out and use the naked board as a base to a hack.

adolescent · 22 November 2008, 06:14

Some old AST 386/486 machines used 64 pin SIMMs. Was never sure if they were compatible with the GVP, but at least they had the right layout/number of chips.

rkauer · 22 November 2008, 06:23

As so old Apple II. But the SIMM are 8bits-1Mb (no chance they work as 32-bit memory on GVP boards).

My only goal is confirm dimensions and pin pitch before start hacking.

21 November 2008, 20:33	#1
rkauer I hate potatos and shirts Join Date: Oct 2007 Location: Sao Leopoldo / Brazil Age: 58 Posts: 3,482	Old cache memory as a "base" for GVP memory Reached in my hands two old cache memory little boards. I noticed the "strange" pinout of 'em and decide to count the pin number... 64 pins? 32 on each side of the centre? Same pitch as a regular SIMM... What the hell! Just to confirm, can you guys certificate the GVP memory banks have this exact shape so I can make a pair of those über rare 16Mb SIMM for me? Of course I know I must de-solder the old cache chips and capacitors, them solder a 72pin SIMM via wires... @Zetr0: hope this acts as a birthday gift for our friend addicted to hardware pr0n! Attached Thumbnails

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22 November 2008, 00:50	#2
coze hastala vista winny vista Join Date: Feb 2006 Location: mt fuji Age: 46 Posts: 1,335	it would be one hell of a coincidence for them to be GVP pinout ... Also the SIMM in the picture has 6 chips, which isn't good omens IMHO.

22 November 2008, 05:37	#3
rkauer I hate potatos and shirts Join Date: Oct 2007 Location: Sao Leopoldo / Brazil Age: 58 Posts: 3,482	I know that, mate. I just want to confirm the pin spacement and distribution. My idea is take the chips and capacitors out and use the naked board as a base to a hack.

22 November 2008, 06:14	#4
adolescent Powered by Motorola Join Date: Feb 2002 Location: Redondo Beach, CA Age: 52 Posts: 1,065	Some old AST 386/486 machines used 64 pin SIMMs. Was never sure if they were compatible with the GVP, but at least they had the right layout/number of chips.

22 November 2008, 06:23	#5
rkauer I hate potatos and shirts Join Date: Oct 2007 Location: Sao Leopoldo / Brazil Age: 58 Posts: 3,482	As so old Apple II. But the SIMM are 8bits-1Mb (no chance they work as 32-bit memory on GVP boards). My only goal is confirm dimensions and pin pitch before start hacking.

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