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

IBM Monochrome Display and Parallel Printer Adapter (continued)
DMA Channel 2-42
Interrupt and DMA Response Requirements 2-39
Interrupt Levels 2-42
I/O Address and Bit Map 2-42
Lines Used 2-39
Loads 2-39
Memory Requirements 2-41
Modes of Operation 2-40
Programming the 6845 CRT Controller 2-41
Sequence of Events 2-41
Important Operating Characteristics 2-36
IER (Interrupt Enable Register) 2-141
IIR (Interrupt Identification Register) 2-139
Input/Output Signals:
Data (DO, D7) 2-133
External Clock Input/Output (XTALl, XTAL2) 2-133
Input Requirements (Power Supply) 2-34
Input Signals
Address Strobe (ADS) 2-129
Chip Select (SCO, CSl, CS2) 2-129
Clear to Send (CTS) 2-130
Data Input Strobe (DISTR, DISTR) 2-129
Data Output Strobe (DOSTR, DOSTR) 2-129
Data Set Ready (DSR) 2-131
Master Reset (MR) 2-130
Received Line Signal (RCLK) 2-130
Receiver Clock (RCLK) 2-130
Register Select (AO, AI, A2) 2-130
Ring Indicator (RI) 2-131
Serial Input (SIN) 2~130
Interface Diagram
Asynchronous Communications Adapter 2-147
Cassette Connector Specifications 2-21
Color/Graphics Monitor Adapter 2-62
5 1/4" Diskette Drive Adapter External 2-109
5 1/4" Diskette Drive Adapter Internal 2-108
Game Control 2-122
IBM Monochrome Display Direct Drive 2-44
Keyboard Connector Specifications 2-18
Parallel Printer 2-69
INTRPT (Interrupt) 2-132
Interrupt Control Functions 2-140
Intel 8048 (Keyboard Microcomputer) 2-14
Intel 8088 (System Unit Microprocessor) 2-3
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