PCjs Machines

Home of the original IBM PC emulator for browsers.


IBM Video Graphics Array (VGA)


We have only one IBM VGA ROM revision, dated October 27, 1986, from an IBM PS/2 Display Adapter. Which, BTW, has to be one of the most confusing product names ever, since the adapter was an 8-bit card designed for ISA machines, not PS/2 machines.

To (re)build the JSON-encoded IBM VGA ROM with symbols, run the following command:

filedump --file=archive/IBM-VGA.rom --format=bytes --decimal

The symbol information in the MAP file will be automatically converted and appended to the dump of the ROM file.

The disassembled contents of the 1986-10-27 ROM from the IBM PS/2 Display Adapter is available here.