NEC Advanced Personal Computer System Reference Manual page 11

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List of Tables
Table
2-1
2-2
2-3
2-4
2-5
2-6
2-7
2-8
2-9
2-lO
2-11
2-12
3-1
3-2
3-3
3-4
3-5
3-6
3-7
3-8
3-9
3-lO
3-11
3-12
3-13
3-14
3-15
3-16
3-17
3-18
3-19
3-20
3-21
Title Page
Card Cage Socket Contact Assignments . . . . . . . . . . . . . . . . . . . . .. 2-4
DMA Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-14
Timer Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-20
Interrupt Lines ........................................... 2-21
Interrupt Control Commands Summary. . . . . . . . . . . . . . . . . . . . .. 2-22
Parallel Printer Connectors Pin Assignments. . . . . . . . . . . . . . . . .. 2-31
Parallel Printer Interface Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-33
Parallel Printer Controller Instruction. . . . . . . . . . . . . . . . . . . . . . .. 2-35
Parallel Printer Controller Instruction Sequence . . . . . . . . . . . . . .. 2-36
Keyboard Scan Codes ..................................... 2-39
Keyboard Interface Lines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-42
Clock/Calendar Instruction Format ......................... 2-44
Attribute Description for Character Attribute Code ............ 3-6
GDC I/O-Address and Bit Map ............................. 3-9
Contents of the GDC Status Register ........................ 3-lO
GOC Symbols ............................................ 3-11
GOC Commands ......................................... 3-14
GDC Command Constants. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-18
Bit Description of the FDC Main Status Register .............. 3-23
FOC Symbols ............................................ 3-24
FDC Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-27
FDC Status Register 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-33
FOC Status Register 1 ..................................... 3-34
FDC Status Register 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-35
FDC Status Register 3 .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-36
FDC Register I/O Addresses and Functions .................. 3-36
Output Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-37
Input Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-38
FDD Specifications ....................................... 3-39
Serial I/O Communications Controller Specifications .......... 3-44
Serial I/O Commands ..................................... 3-46
Serial I/O Connector Pin Assignments .................... .... 3-47
Serial I/O Device Interface Connector
Pin Descriptions .......................................... 3-48