NEC Advanced Personal Computer System Reference Manual page 7

Contents (cont'd)
Page
3.5 FDD UNIT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-39
3.5.1 Specifications ................................. , 3-39
3.5.2
Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-40
3.5.3 Terminations and Jumper Settings. . . . . . . . . . . . . . .. 3-40
3.6 SERIAL I/O COMMUNICATIONS CONTROLLER ..... , 3-43
3.6.1 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-43
3.6.2 Circuit Description. . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-43
3.6.3 Interface ..................................... , 3-43
3.6.4 Programming Considerations ................... , 3-43
3.6.4.1 Asynchronous Operating Mode .................. 3-50
3.6.4.2 Synchronous Operating Mode ................... 3-53
3.6.4.3 Business Machine Operating Mode ............... 3-57
3.6.5 Status Word Format ........................... 3-59
3.7 SOUND CONTROL .................................. , 3-60
3.7.1 Interface ...................................... 3-61
3.7.2 Programming Considerations. . . . . . . . . . . . . . . . . . .. 3-62
3.8 ARITHMETIC PROCESSING UNIT. . . . . . . . . . . . . . . . . . .. 3-62
3.9 JUMPER SETTINGS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-64
CHAPTER 4 POWER SUPPLY
APPENDIX A INTEGRATED CIRCUIT DATA SHEETS
Al 16-BIT MICROPROCESSOR ........................... AI-I
A2 PROGRAMMABLE COMMUNICATION INTERFACES .. A2-1
A3 SINGLE/DOUBLE DENSITY FLOPPY DISK
CONTROLLER ....................................... A3-1
A4 GRAPHICS DISPLAY CONTROLLER .................. A4-1
APPENDIX B LOGIC AND SCHEMATIC DIAGRAMS
VI