System Board
Contents
Chapter 1
Chapter 2
Chapter 3
Chapter 5
Chapter 6
Chapter 3
3/12 LS PRO HARDWARE TECHNICAL REFERENCE
The contents of each of the RTC RAM locations which requires further explanation
is described in the following table.
Location/Title
Bit(s)
Function
0E
7
1 = Real time clock lost power
Diagnostic
6
1 = CMOS checksum bad
status
5
1 = Invalid configuration at POST
4
1 = Memory size error at POST
3
1 = Fixed disk fails initialization
2
1 = CMOS time found invalid
1, 0
Reserved
0F
7-0
00h = Normal execution of POST
Shutdown
01h = Chipset initialization for real mode re-entry.
code
05h = Issue an EOI and JMP to 40:67h
06h = JMP to 40:67h without an EOI
07h = Return to INT 15h function AH=87h block move
08h = Return to POST memory test
09h = Return to INT 15h function AH=87h block move
0Ah = JMP to 40:67h without an EOI
10
7-4
Drive type of diskette drive 0
Diskette
0000 = No drive
drive type
0001 = Not used (360k)
0010 = Not used (1.2MB)
0011 = Not used (720k)
0100 = 1.44MB
0101-1111 are Reserved
3-0
Reserved (no second drive)
12
7-4
Drive type for drive 0 (0-14) if 15 look at byte 19h
Fixed disk
3-0
Reserved
drive type
13
7-1
Reserved
Power on
0
1 = Power on password enabled
password
14
7-6
Diskette drives installed
Equipment
00h = 1
byte
01-03h Reserved
5-4
Primary display adapter
00h = VGA
01h = Not used (40 column colour)
02h = Not used (80 column colour)
03h = Not used (Monochrome)
3-2
Reserved
1
1 = 80387 installed
0
1 = Diskette drive available for boot
Содержание Apricot LS Pro
Страница 1: ...apricot HARDWARE TECHNICAL REFERENCE MITSUBISHI ELECTRIC LS Pro ...
Страница 2: ...HARDWARE TECHNICAL REFERENCE ...
Страница 6: ...CONTENTS ...
Страница 9: ...Chapter 1 INTRODUCTION ...
Страница 14: ...Chapter 2 SYSTEM UNIT ...
Страница 37: ...Chapter 3 SYSTEM BOARD ...
Страница 60: ...Chapter 4 PERIPHERAL ITEMS ...
Страница 91: ...Chapter 5 MEMORY AND I O USAGE ...
Страница 118: ...Appendix A SPECIFICATIONS ...
Страница 125: ...Appendix B REVISION C SYSTEM BOARD ...
Страница 130: ...ERROR BEEP CODES Appendix C ...
Страница 134: ...INDEX ...