Read-0nly Storage/Random-Access Memory Mode Change
Original Publication Date: 1979-Mar-01
Included in the Prior Art Database: 2005-Feb-20
Many small computers and microcomputers have a block of read-only storage (R0S) installed in place of read-write storage. The read-only storage contains an initial program load routine which may perform basic diagnostics and which allows the computer to bring in the main working programs from an I/O device, such as a disk. Incorporation of the ROS into the range of main storage addresses prevents those addresses dedicated to the R0S from being utilized for read-write storage even after execution of the initial program load routine has been completed.