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S1571 D1181-001 http://www.tyan.com
9 Early Cache
Cyrix CPU initialization.
Initialization
Cache initialization.
A Setup Interrupt Vector Initialize first 120 interrupt vectors with
Table
SPURIOUS_INT_HDLR and initialize
INT 00h-1Fh according to INT_TBL .
B Test CMOS RAM C
Test CMOS RAM Checksum, if bad, or insert key pressed,
Checksum
load defaults.
C Initialize keyboard
Detect type of keyboard controller (optional).
Set NUM_LOCK status.
D Initialize Video
Detect CPU clock.
Interface
Read CMOS location 14h to find out type of video in use.
Detect and Initialize Video Adapter.
E Test Video Memory
Test video memory, write sign-on message to screen.
Setup shadow RAM - Enable shadow according to Setup.
F Test DMA Controller 0 BIOS checksum test.
Keyboard detect and initialization.
10 Test DMA Controller 1
11 Test DMA Page
Test DMA Page Registers.
Registers
12-13 Reserved
14 Test Timer Counter 2 Test 8254 Timer 0 Counter 2.
15 Test 8259-1 Mask Bits Verify 8259 Channel 1 masked interrupts by alternately
turning off and on the interrupt lines.
16 Test 8259-2 Mask Bits Verify 8259 Channel 2 masked interrupts by alternately
turning off and on the interrupt lines.
17 Test Stuck 8259’s
Turn off interrupts then verify no interrupt mask register is
Interrupt Bits
on.
18 Test 8259 Interrupt
Force an interrupt and verify the interrupt
Functionality
occurred.
19 Test Stuck NMI Bits
Verify NMI can be cleared.
(Parity/IO Check)
1A
Display CPU clock.
1B-1E Reserved
1F Set EISA Mode
If EISA non-volatile memory checksum is good,
execute EISA initialization. If not, execute ISA
tests and clear EISA mode flag.
Test EISA Configuration Memory Integrity
(checksum & communication interface).
20 Enable Slot 0
Initialize slot 0 (System Board).
21-2F Enable Slots 1-15
Initialize slots 1 through 15.
30 Size Base and
Size base memory from 256K to 640K and
Extended Memory
extended memory above 1MB.
31 Test Base and Extended Test base memory from 256K to 640K and
Memory
extended memory above 1MB using various
patterns.
NOTE: This test is skipped in EISA mode and can
be skipped with ESC key in ISA mode.
System Resources
