Quadram Microfazer II Expansion Board MC 128 SEALED New Old Stock V17

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

JULY 1984 Quadram Quadboard designed for IBM PC and XT Computers

Microsoft MS-DOS 4.01 Operating System & Instruction Manual & Case MSDOS 4 book

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

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

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

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