Post (Power On Self Test) - Konica Minolta IP-423 Service Manual

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POST (Power On Self Test)

POST is hardware diagnostic test run by BIOS when the copier's main power switch is turned ON. It checks
the memory, timer settings, hard disk and other function required for the system to run.
It is output to the service port and HyperTerminal can be used to view the startup status of the print control-
ler, by connecting a computer to the copier.
Details of the Service Port Output
The details of the status output from when the print controller starts until the system (VxWorks) starts is
described below.
IP-422:
===Power On self Test===
Init CPU Reg. (Initialize Device Information)
Disable NMI & RTC Ints. (Disable NMI and RTC interrupts)
Reset Coprocessor. (Reset the Coprocessor)
Wait... (Pause to ensure system stability)
Reset Boot Flag P92. (Clear the reset flag)
Disable Shadow. (Disable Shadow)
Init CMOS Memory. (Initialize the CMOS memory settings)
Test Timers. (Test the system timer)
Start Refresh DRAM. (Refresh DRAM)
Check Memory Amount. (Check the amount of memory)
Test Base 64KB Memory. (Test memory below 64KB)
Clear Base 64KB Memory. (Clear the area of memory below 64 KB)
Enable L1 Cache. (Enable the use of L1 cache)
Init BIOS Data Area. (Initialize the BIOS data area and memory controller)
Init Interrupt Controller. (Initialize and mask the interrupt controller)
Init Interrupt Vector Table. (Initialize the Interrupt Vector Table)
Init Extended ROM Area. (Initialize the extended ROM area)
Init Timers. (Initialize RTC and timer settings, and clear the interrupt mask)
Init Com Port. (Initialize the serial port)
Init PCI. (Configure PCI devices)
Enable Shadow. (Enable Shadow)
Konica Corporation IP-422 : BIOS Version xxx
Embedded BIOS (tm) Version x.x
Copyright (C) 2000 General Software, Inc.
00000640K Low Memory Passed (Test memory between 64 KB and 640 KB)
00064512K Ext Memory Passed (Test memory above 640 KB)
Check Key-In. (Check keyboard input)
Wait.....
Set Memory Size (Set the memory size for the expanded data area)
Chapter 3 Field Service
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