Vintage AST Research MegaPlus multifunction expansion card for early IBM PC and compatible computers.
The card is populated with four banks of OKI M3764A memory chips, providing approximately 256KB of conventional memory with parity. It also includes an RS232 serial port and a battery backed clock and calendar.
Features include:
- Approximately 256KB of installed RAM
- RS232 serial port
- Clock and calendar function
- Replaceable coin cell battery
- Eight bit ISA interface
- AST Research copyright date of 1982
- Board number 02 10047 01
- Revision B
This card was commonly used to add memory and communication features to early IBM Personal Computer and PC XT systems. Similar MegaPlus cards support IBM PC, IBM PC XT, and compatible systems.
The board appears clean overall, with normal age related wear. Please review the photographs carefully for its exact configuration and condition.
Only the AST MegaPlus card shown is included. No manual, software, cables, brackets, or other accessories are included.
