Microcode is programming that is ordinarily not program-addressable but, unlike hardwired logic, is capable of being modified. Microcode may sometimes be installed or modified by a device's user by altering programmable read-only memory ( PROM ) or erasable programmable read-only memory ( EPROM ).
HDS enhances Thunder 9500 V with SATA discs and worm option
New controller microcode improves Serial Advanc...(ComputerWeekly.com)
Firmware is programming that's written to the r...(SearchCIO-Midmarket.com)
IBM uses this term in preference to firmware .