IBM PS/2 35 SX Hardware Maintenance Reference page 13

IBM PS/2 Model 35 SX, 35 LS, 35 SLC HMR
ROM BIOS
1.2.3 ROM BIOS
ROM BIOS contains the instructions and routines that control the keyboard,
diskette drives, hard disk drive, displays, and other major input/output
devices in the system. Some adapters have their own ROM modules
containing extended BIOS routines that work with the system board ROM
BIOS. The routines for performing the power-on self-test (POST) are also
contained in the ROM BIOS.
¦ Copyright IBM Corp. 1991, 1992
1.2.3 - 1