IBM 5150 PC Technical Reference (6025005, August, 1981) (PDF)

I/O (Input/Output)
Address Map 2-33
Channel 2-8
Channel Description (System Board) 2-10
Diagram 2-9
I/O CH CK (I/O Channel Check) 2-10
I/O CH RDY (I/O Channel Ready) 2-11
lOR (I/O Read Command) 2-11
lOW (I/O Write Command) 2-11
Interrupts
And DMA Response Requirements 2-39
Enable Register 2-141
Identification Register 2-139
Levels (O-XX) 2-42
Vector Listing 3-3
Vectors (O-7F) 3-21
1 CH - Timer Tick 3-5
1 DH - Video Parameters 3-5
1 EH - Diskette Parameters 3-5
1 FH - Graphics Character Extensions 3-6
15 3-8
K
KB - Kilobyte (See Memory Expansion Options)
Keyboard
Break 3-16
Character Codes 3-11
Diagram 2-16
Encoding 3-11
Extended Codes 3-13
Extended Functions 3-13
Interface Block Diagram 2-15
Interface Connector Specifications 2-18
Pause 3-16
Print Screen 3-16
Scan Codes 2-17
Shift States 3-14
Shift Key Priorities 3-15
Special Handling 3-15
System Reset 3-15
Usage 3-17
Kilobyte (KB) (See Memory Expansion Options)
1-10