Sharp PC-1500 - PC-1500 System Block Diagram and LSI Details

All and more about Sharp PC -1 500 at http:/lwww.PC-1500. in fo
4.
PC -1500 hardware description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
4-
1. PC-1500 system configuration ......... ........ .. ................ . ......... .. . .. .. 86
4-1-1. Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . 86
4-1-2.
Block diagram. .... . .. . .. . . ... ...... .. . . ..... . ............ . .... . . ... . . . . .. 87
4-1·3. Power supplies (PC-1500, CE-150, CE-158, CE-159) .. .... . .. . . .. .... . . . .. . . 87
4-2. PC-1500 . . . . .
......... .......... . . .. . .. . .. . .... . .. . .. ...... ... .. . . .. . .. .......... 89
4- 2· 1. Outline . .. . . .. . .. . . .......... . • . .. . . .. . .. •. . . . . . .. .. • . .... , . . . . • . . . • . . . . . 89
4·2·2. Block diagram . . . . . . . . . • . . . . • . . • . . . . . • . . . . • . . . . . . . . . . . . . . . . • . . . . . • . . . . . . . 90
4-2·3.
Chip select circuit . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . • . . . . . . . . . . . . . . • . . . . . 91
4- 2·4 . PC-1500 system memory map . .... ........ .. .... .. .... .. ... ... . .. . ... ..... 94
4-3.
Connector signals /LSI signals ..... ......... . .... .•..........•....•.....•..... .... 102
4-3·1.
40-pin connector ............ . ...................................... ...... 102
4-3-2. 60-pin connector ............ .......... . ... .......... .... .... . ....... ..... 103
4-3·3 . LH5801 Microproc essor ............. ... ........................... ........ 104
4·3·4.
110 PC .... . . . .. ........... .• . ... ......... • . . . . ............•... .. . . . . . .... 105
4-4. Key matrix and key code chart ...... . ............•....•.. . ................ . . . .. . . 109
5. PC-1500 soft ware .... ....... . .. . . .. ..... . . ...... . . . ........ . .... • .... •• .... •• .. . . . .. . 111
5.·1. BASIC command related PC -1500 machine language . . ..•. .. . •• .. . •• . .. .•.. . . .. . .. 112
5-1-1. NEW . . . . . .
.. .. . . .... .. .... . . . . . .. . .. .... ..... . .• .... • •.... •. ... .. . . .. .. . . 112
5-1-2.
STATUS . .. . .... ... ... .. ...... •• ............... •.. .. •.. ... • .... ... ....... 112
5· 1·3. PEEK . . .. .. •. . . . •.. ... ••. ......•. . . . . . . . .. .... •.. ... •. ....•.....• . . ...... 113
5- 1-4. POKE ......•..............................•............ ... •. .... • . . ...... 113
5·1·5. CALL . ...... ...................... .. . . ................................. .. 114
5-1-6.
CSAVE M ...... ......... ....... ............ .......... ... ........... ...... 114
5-1-7.
CLOAD M .... ...................... .... ...•.............................. 114
5-2.
Internal code chart ...... ... ....... . .. • .. . . ......•.. . . . ............... ........... 115
5·3. Expression of variable and program ... . ....... . ..•.. . .••....•....... ....... . . .... 116
5-3-1. Expression
of decimal number .... ... .. .. . •• . . ............. .. ...••. . . . . . . . 116
5-3-2. Expression
of binary number ...... ... • .... •• .. . . •. .. . . •. ... • .. ... • .. ... ... 116
5-3-3. Expression
of character string ..... .. ... .. . • .. .. •• .... . ..... • . .. . . • . . . . . ... 116
5-3-4.
Structure of variable name .. . .. . . . .. . .....•....••....••...••.. .. ••. .... ... 117
5-3-5.
Structure of program .................. .. . . .. . . . •....•........ ... ..... .... 117
5-3-6.
Structure of reserve area .... .... . .... . .... .• .... • ...... .. . .. .. . .. . ... . .... 118
5-4.
System subroutines .................... . ............... • .......... •. .... . ........ 120
5-4-1. Character function s ........•..•. ........... ......................... .... . 122
5·4-2 . Arithmetic subroutines .....................................•.............. 127
5-4-3.
Comparison . .. ..... . . . . ... .•. .. .... . . .. ............................. ..... 128
5-4-4.
Search .. . .. . . .. ................... . .. . ... •• .... •. .. ...... ••. ... .• ..... .. . 129
5-4-5.
Disp lay .. .. • .. . . •.. ... • ... ............... •. . . .. • .....•.... •. .... •. ... . .. . 131
5-4-6. Printer ... .. .... . • .......... • ... • . ... • ... . •• .. . . •. .. . . .. ... • .. ... • .. . . . . . . 135
5-4-7. Cassette tape
.. . . . .. ....... .. . .. . .... . .. . • .. . . • , . .. . •. .. . . .. .. . . .. . . .. . . . 138
5-4-8.
Caution for system subroutine call 141
6. Machine language programming examples ..... . . . .. ... • .. .. • ..... • ..... . .. . ... . . ..... 143
6-1. B
inary to hexadecimal conversion ......... . . . . .... •.. .. • ..... • ............ . . ... .. 144
6-2.
Display inversion ...... .............. . .... ... . . ........ •. ............ ..... . . ..... 145
6-3 . Single display dot left shift ........... : ........................................ ... 146
6-4 . Single display dot right s hift. .... ... ..... .. . . . ..... .............. .......... ... .... 147
6-5 . Conversion of USING format expressed numerical data into cha racter string . .... . .. 148
6-6.
Power off that does not activate the printer upon power on
148
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