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MacPaint Image  |  1990-01-09  |  30.3 KB  |  576x720  |  1-bit (2 colors)  |  [PNTG/MPNT]
   ocr: C1 Timing Generation 1N914 D1 Sound Input Device Oscillator C4 R1 10KS .1pF 1N914D2 Copyright All 0 Rights 1990 by Reserved The SID Trio pF U2 U2 U2 U2 74HC04 74HC04 1n 16 U1 74HC04 74HC04 R4 R8 HSKI 1 Osc R3 1E ol S1K R2 120 150 14 > CLR CLKB CLKA 390 QD QC QB QA 7 10 11 13 Do498 C24 +y Y 279 22pF C10-T VY 279 2(7) 1M Y1 IH 8 1.558Mhz 1. CLR CLKB QD QC QA 3 b 5 A/DCS! 1uF A/D Conversion CLKA QB TC3 TC2 100pF 100pF 8 U4 - R30 > U2 U2 1K 1 LPI Filter -V Data Clock 2 CS CK Vcc DO 6 74HC04 2506 74HC04 R23 R24 C23 Vin+ ADC YY 51K 68K 1pF MY R29 R32 Vin- Vref 0831 R U3 TL064 R31 10K 1%, 2 10K Gnd R ...