Intel P35 User Manual page 43

P3 Series
9 Early Cache Initialization
A Setup Interrupt Vector
Table
B Test CMOS RAM
Checksum
C Initialize keyboard
(optional)
D Initialize Video
Interface
E Test Video Memory
F Test DMA Controller 0
10 Test DMA Controller 1
11 Test DMA Page Registers Test DMA Page Registers.
12-13 Reserved
14 Test Timer Counter 2
15 Test 8259-1 Mask Bits
16 Test 8259-2 Mask Bits
17 Test Stuck 8259's
Interrupt Bits
18 Test 8259 Interrupt
Functionality
19 Test Stuck NMI Bits
(Parity/IO Check)
1A
1B-1E Reserved
1F Set EISA Mode
20 Enable Slot 0
Cyrix CPU initialization. Cache initialization.
Initialize first 120 interrup tvectors with SPURIOUS_INT_HDLR
and initialize INT 00h-1Fh according to INT_TBL.
Test CMOS RAM Checksum, if bad, or insert key pressed,
load defaults.
Detect type of keyboard controller.
Set NUM_LOCK status.
Detect CPU clock. Read CMOS location 14h to find out type
of video in use. Detect and Initialize Video Adapter.
Test video memory, write sign-on message to screen.
Setup shadow RAM - Enable shadow according to Setup.
BIOS checksum test. Keyboard detect and initialization.
Test 8254 Timer 0 Counter 2.
Verify 8259 Channel 1 masked interrupts by alternately
turning off and on the interrupt lines.
Verify 8259 Channel 2 masked interrupts by alternately turning
off and on the interrupt lines.
Turn off interrupts then verify no interrupt mask register is on.
Force an interrupt and verify the interrupt occurred.
Verify NMI can be cleared.
Display CPU clock
If EISA non-volatile memory checksum is good, execute EISA
initialization. If not, execute ISA tests an clear EISA mode flag.
Test EISA Configuration Memory Integrity (checksum &
communication interface).
Initialize slot 0 (System Board).
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User's Manual