This is a close-up of the Mega-3 ROM inside Station 1. This chip is a little marvel in itself, as it contains Inter-Word, which is a 32K application, Inter-Sheet, another 32K application, and Inter-Chart.
Although not altogether clear from this picture, the ROM chip used is a 32-pin 27C101, mounted in a little carrier module for inserting into a standard BBC 28-pin ROM socket.
Inter-Word is a 32K application, made up of 2 separate 16K ROM images and the Inter-Word application uses an ingenious system of paging the appropriate ROM image in and out of the memory map as required.
Click here to return to Special Features