Quadram Silver Quadboard RTC with 384k RAM and Backplate with Serial/Game ports

QUADRAM 8936 QUADBOARD ISA 8 BIT MEMORY BOARD 384k tested upgrade to 640k

Quadram ISA Multifunction Card 1985 P/N 01-9006-R2 IBM PC XT Memory I/O Vintage

JULY 1984 Quadram Quadboard designed for IBM PC and XT Computers

Quadram 8 Bit Memory Board

Quadram Corp Microfazer MP8 64K Parallel In / Out Data Buffer Mainframe Rare

Vintage Quadram Quadboard RTC 256KB memory expansion I/O 8 bit ISA ISA490

Quadram Microfazer II Expansion Board MFB 512 in Box with Instruction Book NOS