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1MB next.
49 The amount of memory below 1MB has been found and verified.
Determining the amount of memory above 1MB memory next.
4B The amount of memory above 1MB has been found and verified.
Checking for a soft reset and clearing the memory below 1MB for
the soft reset next.
If this is a power on situation, going to checkpoint 4Eh next.
4C The memory below 1MB has been cleared via a soft reset.
Clearing the memory above 1MB next.
4D The memory above 1MB has been cleared via soft reset. Saving
the memory size next. Going to checkpoint 52h next.
4E The memory test started, but not as the result of a soft reset.
Displaying the first 64KB memory size next.
4F Memory size display started. This will be updated during
memory test.
Performing the sequential and random memory test next.
50 Memory testing/initialization below 1MB completed. Going to
adjust displayed memory size for relocation and shadowing.
51 The memory size display was adjusted for relocation and
shadowing.
Testing the memory above 1MB next.
52 The memory above 1MB has been tested and initialized. Saving
the memory size information next.
53 The memory size information and the CPU registers are saved.
Entering real mode next.
Code Description
54 Shutdown was successful. The CPU is in real mode. Disabling the
Gate A20 line, parity, and the NMI next.
57 The A20 address line, parity, and the NMI are disabled.
Adjusting the memory size depending on relocation and
shadowing next.
58 The memory size was adjusted for relocation and shadowing.
Clearing the
Hit <DEL> message next.
59
The Hit <DEL> message is cleared. The <WAIT
…
> message is
displayed.
Staring the DMA and interrupt controller test next.
60 The DMA page register test passed. To do DMA#1 base register
test.
62 DMA#1 base register test passed. To do DMA#2 base register
test.
65 DMA#2 base register test passed. To program DMA unit 1 and 2.
66 DMA unit 1 and 2 programming over. To initialize 8259 interrupt
controller.