IBM 5150 PC Technical Reference (6025005, August, 1981) (PDF)
IBM 5150 PC Technical Reference (6025005, August, 1981) (PDF) IBM 5150 PC Technical Reference (6025005, August, 1981) (PDF)
CONTENTS SECTION 1. HARDWARE OVERVIEW......... 1-1 System Block Diagram ............................ 1-4 SECTION 2. HARDWARE...................... 2-1 System Board ................................... 2-3 System Board Data Flow .......................... 2-6 I/O Channel ..................................... 2-8 I/O Channel Diagram ............................ 2-9 System Board I/O Channel Description ............. 2-10 System Board Component Diagram ................. 2-13 Keyboard........................................ 2-14 Keyboard Interface Block Diagram ................. 2-15 Keyboard Diagram ............................... 2-16 Keyboard Scan Codes ............................. 2-17 Keyboard Interface Connector Specifications ......... 2-18 Cassette User Interface ............................ 2-19 Cassette Jumpers ............................... 2-19 Circuit Block Diagrams ......................... 2-19 Cassette Interface Connector Specifications .......... 2-21 Speaker Interface ................................. 2-22 Speaker Drive System Block Diagram ............. 2-22 I/O Address Map ................................. 2-23 System Memory Map ............................. 2-25 System Board And Memory Expansion Switch Settings ... 2-28 5 1/4" Diskette Drives Switch Settings .............. 2-29 Monitor Type Switch Settings .... , ..... , ........... 2-29 System Board Memory Switch Settings .............. 2-30 32/64 KB Memory Expansion Option Switch Settings ... 2-31 Power Supply ................................... 2-33 Power Supply Location ............................ 2-34 Input Requirements ............................... 2-34 DC Output ...................................... 2-34 AC Output ...................................... 2-34 Power Supply Connectors And Pin Assignments ...... 2-35 Important Operating Characteristics ................. 2-36 Over Voltage/Current Protection ................. 2-36 Signal Requirements ............................ 2-36 iii
IBM Monochrome Display and Parallel Printer Adapter................................. 2-37 Parallel Interface Description ...................... 2-37 IBM Monochrome Display Adapter Block Diagram ... 2-38 System Channel Interface .......................... 2-39 Lines Used .................................... 2-39 Loads ......................................... 2-39 Special Timing ................................. 2-39 Data Rates .................................... 2-39 Interrupt and DMA Response Requirements ....... 2-39 Modes Of Operation .............................. 2-40 Programming Considerations ....................... 2-41 Programming the 6845 CRT Controller ........... 2-41 Sequence of Events ............................. 2-41 Memory Requirements .......................... 2-41 DMA Channel ................................. 2-42 Interrupt Levels ................................ 2-42 I/O Address and Bit Map ....................... 2-42 IBM Monochrome Display ........................ 2-43 Operating Characteristics ........................ 2-43 IBM Monochrome Direct Drive Interface and Pin Assignment ................................. 2-44 Color/Graphics Monitor Adapter ................. 2-45 Color/Graphics Monitor Adapter Block Diagram ..... 2-47 Major Components Definitions ..................... 2-48 Motorola 6845 CRT Controller .................. 2-48 Mode Set and Status Registers ................... 2-48 Display Buffer ................................. 2-48 Character Generator ............................ 2-48 Timing Generator .............................. 2-48 Composite Color Generator. ..................... 2-48 Modes of Operation ............................... 2-49 Alphanumeric Mode ............................ 2-49 Color TV ...................................... 2-49 Color Monitor ................................. 2-50 IBM Monochrome Display Adapter V s. Color/Graphics .. . Adapter Attribute Relationship ..................... 2-51 Color/Graphics Modes ............................ 2-51 Graphics Storage Map .......................... 2-52 Description of Basic Operations .................. 2-54 Summary of Available Colors .................... 2-55 iv
- Page 1: April 2011 IMPORTANT 1. The motherb
- Page 5 and 6: FEDERAL COMMUNICATIONS COMMISSION R
- Page 10 and 11: Programming Considerations ........
- Page 12 and 13: INS 8250 Functional Pin Description
- Page 14 and 15: FIGURE LISTING 1. System Block Dia
- Page 16 and 17: SECTION I. HARDWARE OVERVIEW The
- Page 18 and 19: The 16KB Memory Expansion Kits allo
- Page 20 and 21: SECTION 2. HARDWARE ~ Contents: Sys
- Page 22 and 23: SYSTEM BOARD The System Board fits
- Page 24 and 25: The memory is dynamic 16K x 1 chips
- Page 26 and 27: System Board Data Flow Figure 2. S
- Page 28 and 29: 1/0 Channel Diagram REAR PANEl SI
- Page 30 and 31: I/O CHRDY I I/O Channel Ready: This
- Page 32 and 33: System Board Component Diagram REA
- Page 34 and 35: Keyboard Interface B lock Diagram
- Page 36 and 37: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
- Page 38 and 39: Cassette User Interface The cassett
- Page 40 and 41: Cassette Interface Connector Specif
- Page 42 and 43: I/O Address Map HEX RANGE 9 8 7 6
- Page 44 and 45: System Memory Map X'OOOOO' 16 TO 6
- Page 46 and 47: System Memory Map Cont. START ADDR
- Page 48 and 49: 5-1/4" Diskette Drives Switch Setti
- Page 50 and 51: 32/64KB Memory Expansion Option Sw
- Page 52 and 53: Power Supply The system DC power su
- Page 54 and 55: N I ~ VI ) § I • \. ~ o el so.
- Page 56 and 57: IBM Monochrome Display and Parallel
<strong>IBM</strong> Monochrome Display and Parallel <br />
Printer Adapter................................. 2-37 <br />
Parallel Interface Description ...................... 2-37 <br />
<strong>IBM</strong> Monochrome Display Adapter Block Diagram ... 2-38 <br />
System Channel Interface .......................... 2-39 <br />
Lines Used .................................... 2-39 <br />
Loads ......................................... 2-39 <br />
Special Timing ................................. 2-39 <br />
Data Rates .................................... 2-39 <br />
Interrupt and DMA Response Requirements ....... 2-39 <br />
Modes Of Operation .............................. 2-40 <br />
Programming Considerations ....................... 2-41 <br />
Programming the 6845 CRT Controller ........... 2-41 <br />
Sequence of Events ............................. 2-41 <br />
Memory Requirements .......................... 2-41 <br />
DMA Channel ................................. 2-42 <br />
Interrupt Levels ................................ 2-42 <br />
I/O Address and Bit Map ....................... 2-42 <br />
<strong>IBM</strong> Monochrome Display ........................ 2-43 <br />
Operating Characteristics ........................ 2-43 <br />
<strong>IBM</strong> Monochrome Direct Drive Interface and <br />
Pin Assignment ................................. 2-44 <br />
Color/Graphics Monitor Adapter ................. 2-45 <br />
Color/Graphics Monitor Adapter Block Diagram ..... 2-47 <br />
Major Components Definitions ..................... 2-48 <br />
Motorola 6845 CRT Controller .................. 2-48 <br />
Mode Set and Status Registers ................... 2-48 <br />
Display Buffer ................................. 2-48 <br />
Character Generator ............................ 2-48 <br />
Timing Generator .............................. 2-48 <br />
Composite Color Generator. ..................... 2-48 <br />
Modes of Operation ............................... 2-49 <br />
Alphanumeric Mode ............................ 2-49 <br />
Color TV ...................................... 2-49 <br />
Color Monitor ................................. 2-50 <br />
<strong>IBM</strong> Monochrome Display Adapter V s. Color/Graphics .. . <br />
Adapter Attribute Relationship ..................... 2-51 <br />
Color/Graphics Modes ............................ 2-51 <br />
Graphics Storage Map .......................... 2-52 <br />
Description of Basic Operations .................. 2-54 <br />
Summary of Available Colors .................... 2-55 <br />
iv
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