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The Unsorted BBS Collection
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Graphics Interchange Format
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1994-06-22
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21KB
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595x677
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4-bit (9 colors)
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diagram
OCR:
8-BIT STEREO/MONO SOUND OUTPUT FROM YOUR PARALLEL PORT(S) THIS DESIGN BY DAVE BOYD (Version 1.90) Addition to VV1.00 board that adds support for the Stereo-on-2 format. Refer to the README.1ST for Information regarding the use of this schematic. TO DB-25 CONNECTOR 120 PIN # VEC 9 21 A1 74HCT1Y 18 8 71A2 244 1Y2 16 7 ZIA3 173m 6 1Y 412 4.7K 5 2A1 2Y 1 13PA2 2Y25 IM ISPAS 2Y35 VCc 2 17 52A4 GND 2143 DSC RST ETRG SS'S OUTS 25 / THR GND CVS 0.1uF .01 4F 100uF 2N3906 20 20 Vcc 4 72D 205 7 73D 30℃ 8 4D 40 g 13 135D 50h2 14 146D 60|15 12 15 17 70T 74HCT373 16 18 11 DER 19 GID TO 74HCT373 10 5 Mono/ 4 SOCKET 1/6 74HCT04 FROM 74HCT373 Stereo-on-1 10 K 1/6 74HCT04 SOCKET Stereo-on-2/ Stereo-on-1 2 1/6 74HCT04 Copyright 1994, Dave Boyd Note Or All IC.'s must have o 1 uF decoupling capacitor connected ...
