Teknor Industrial Computers TEK-AT4LVG Technical Reference Manual page 186

8 Setup low memory
9 Early Cache
Initialization
A Setup Interrupt
Vector Table
B Test CMOS RAM
Checksum
C Initialize keyboard
D Initialize Video
Interface
E Test Video Memory
F Test DMA Controller 0
10 Test DMA Controller 1
11 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
Interrupts Bits
18 Test 8259 Interrupt
Functionality
19 Test Stuck NMI Bits
(Parity/IO Check)
Early chip set initialization.
Memory presence test.
OEM chip set routines.
Clear low 64K of memory.
Test first 64K memory.
Cyrix CPU initialization.
Cache initialization.
Initialize first 120 interrupt vectors 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 (optional).
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 DMA Page Registers.
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.
Appendices 18-23