IBM 5150 Hardware Reference Manual page 385

Read/Write Memory (continued)
Graphics Storage Map 2-53
Receive Circuit 2-127
Receiver Clock, (RCLK) 2-128
Recording Medium 2-111
Registers, Address
Command Status 2-100
Initialization
Modem Control 2-142
Modem Status 2-143
Receiver Buffer 2-144
Transmitter Holding 2-145
Register File
Requirements
Reserved Memory Locations (400-5FF) 3-22"
Hardware Overview 1-1
I/O Address Map 2-24
Memory Address Space 2-61
Memory Expansion Options 2-113
User 3-7
Refresh Cycles 2-8
Data 2-9
Parameters 2-41
INS 8250 Accessible 2-134
INS 8250 Line Control 2-134
Interrupt Enable 2-141
Line Control 2-134
Line Status 2-137
Main Status 2-9
6845 2-55
Color Select 2-57
6845 Data 2-41
Description 2-56
6845 Index 2-42
6845 Initialization Parameters 2-41
Mode Select 2-58
Status 2-57, 2-59
Input (Power Supply) 2-34
Memory 2-60
Signal (Power Supply) 2-36
RESET DRV (Reset Drive) 2-10
I/O Channel Description 2-119
ROM Address Space, 256 KB 2-25
=RESET 2-105
Result Phase 2-93
1-16