HP 3000 Manuals HP 3000 Manuals
Testing the System A 900 Series HP 3000 system undergoes a self-test upon reset. The Series 922 through Series 949 systems test various system components including: * central processing unit (CPU) * instruction unit * execution unit * floating-point coprocessor * register file * translation look-aside buffer (TLB) * cache boards * installed memory controllers and arrays * all I/O cards that have built-in, executable test routines The self-test also initializes the channel I/O adapter (CA) and device adapter (DA) boards along with the first memory controller. The Series 950 through Series 980 systems verify that enough hardware is functioning to load and execute extended diagnostic programs from initial program load (IPL). This involves testing the processor, the first memory controller, the console and boot devices, and the I/O paths to the console and boot devices. If the initial Series 950 through Series 980 self-test is successful, the code performs a full processor test by testing the following: * nonvolatile memory (NVM) * stable storage * central processing unit (CPU) * system interface unit (SIU) * cache boards * translation look-aside buffer (TLB) After resetting and testing, the system either autoboots or initiates an interactive boot sequence. Whether or not the system autoboots depends on how the autoboot flag is set and the presence of an autoboot file. For information on using the AUTOBOOT command, refer to Chapter 3 .