Some Quadram Cards



Memory Expansion Board

Identified as such via an advertising photo in the rear section of the manual at here.
3 banks of 64 KB = 192 KB

From a thread on the VCFF, we know that:
- Of the RAM banks, bank 0 is the one closest to the ISA slot.
- From left to right, the RAM chips are most likely laid out as bits [P][0][1][2][3][4][5][6][7].

Photo posted by Ps2K at the VCFF

Quadram Memory Expansion Board.jpg



Quad 512+

Identified as such via an advertising photo in the rear section of the manual at here.  (Note: manual not for Quad 512+)

Verified by coolhand1701 at the VCFF, who wrote, "The box I got it in said it was a Quad 512+"

Photo posted by IBM_User at the VCFF.


Quadram Quad 512+.jpg



Quadboard

A Quadram Quadboard of 1982
Clock / 1 x parallel / 1 x serial / 4 banks of 64 KB = 256 KB
Manual is here

Photo source: eBay

quadram_quadboard_1982_256kb.jpg



Quadboard II

Identified as such via an advertising photo in the rear section of the manual at here.  (Note: manual not for Quadboard II)
Clock / 2 x serial / 4 banks of 64 KB = 256 KB

Photo posted by arkady at the VCFF.

Quadram Quadboard II.jpg



Silver Quadboard

According to JDT at the VCFF, "Its a Silver9006 , Silver Quadboard"
Only 3 banks of RAM

Photo posted by JDT at the VCFF.

quadram_2.jpg



Quadboard

A Quadram Quadboard of 1984
Clock / 1 x parallel / 1 x serial / 6 banks of 64 KB = 384 KB
Manual is here

Photo source: WikiPedia

quadram_quadboard_1984_384kb.jpg



Quadboard

A Quadram Quadboard of about 1984
6 banks of 64 KB = 384 KB

Very close, but not the same, as the board immediately above.

Photo posted by chris_nh at the VCFF.

quadram_5.jpg



Liberty PC

A Quadram memory card of about 1985
8 banks of 256 KB = 2 MB

Quadram Liberty PC.png



?????

An unknown Quadram memory card of about 1985
8 banks of 256 KB = 2 MB

Maybe this is a later version of the Liberty PC ?

Photo posted by Tr3vor at the VCFF.

quadram_4.jpg



Liberty AT

A 16-bit memory card of about 1985
8 banks of 256 KB = 2 MB

See here.