IBM XT 5160

Contents
SECTION 1. SYSTEM BOARD 1-1
Description 1-3
Microprocessor
1-4
Data Flow Diagrams 1-5
System Memory
Map 1-8
System Timers
1-10
System Interrupts 1-11
System Boards
1-12
RAM 1-12
ROM 1-13
DMA 1-14
I/O Channel 1-15
System
Board Diagram 1-19
I/O Channel Description 1-20
I/O Address Map 1-24
Other Circuits 1-26
Speaker Circuit 1-26
8255A I/O Bit Map 1-27
Specifications 1-29
System Unit 1-29
Card Specifications 1-31
Connectors 1-32
Logic Diagrams - 64/256K 1-34
Logic Diagrams - 256/640K 1-46
SECTION 2. COPROCESSOR 2-1
Description 2-3
Programming Interface
2-4
Hardware Interface 2-4
SECTION 3. POWER SUPPLIES 3-1
IBM Personal Computer XT Power Supply 3-3
Description 3-3
Input Requirements 3-4
Outputs 3-4
Overvoltage/Overcurrent Protection 3-5
Power Good Signal 3-5
ix