Labels:text | diagram | black and white | technical drawing OCR: COMMON SIGNALS FOR ALL PERIPHERAL CHIPS ARE: (02 FOR VIAS ONLY.) RES, R/W, IRQ, R50-RSM, AND DO-D7. CIA B (ORIGINALLY IN SOCKET AT U6N) VO EXPANSION ADAPTER PASSES ALL SIGNALS EXCEPT CS PIN SOCKET AT U6N BELOW IS A CIRCUIT THAT CAN BE USED TO GENERATE MIDI BAUD RATE ON ANY CHANNEL BY USE OF A SOFTWARE SWITCH. 74LS90 +5V +5V/ 5MHZ osc. + 10 10 OPTIONAL EXTERNAL CLOCK FOR MIDI APPLICATIONS 6526 CIA (8520) CNT SP RSO R$1 25 R$2 -RS3 RES DO D1 14 40 11 12 LAG NOTE: THE BOXED AREA DESCRIBES THE BITS THAT ARE NEEDED TO ADDRESS CIA B. THE BITS IDENTIFIED BY AN 'R' ARE USED FOR REGISTER SELECTION. ALL THE OTHER BITS ARE 'DON'T CARE', BUT IT IS SUGGESTED THAT THE FOLLOWING CONVENTIONS ARE USED IN ORDER TO SATISFY COMMODORE AMIGA'S GUIDELINES FOR ADDRESSING THE CIAS, AS WELL AS MAKING PROGRAM EXCHANGE POSSIBLE FOR USE OF THE VIAS AND ACIAS. 1011 1111 00 01 RRRR 0000 0000 = $BF1R00 = VIA 0 1011 1111 0101 RRRR 0000 0000 = $BF5R00 = VIA 1 1011 1111 10 01 00RR 0000 0000 = $BF9R00 = DACIA 0 1011 1111 10 01 10RR 0000 0000 = $BF9R00= DACIA 1 1011 1111 1101 RRRR 0000 0000 = $BFDR00 = CIA B +5V #HHIC NEW CIA CS 103 1/2 74F139 04,05,06,07,CB,C9,010 CIA CS FROM AMIGA G Y3 Y2 N.C. 15 B Y1 VIA1 CS2 DACIA 1 CS A15 FROM AMIGA A14 FROM AMIGA A11 FROM AMIGA A YO VIAO CS2 N.C. 13 DACIAO CS 14 U6 DETAIL OF VO EXPANSION ADAPTER AND ADDRESS DECODING +5V REGISTER SUMMARY MAX238 10, 12 VIA O BASE ADDRESS = $BF 1000 VIA 1 BASE ADDRESS = $BF5000 ACIA 0 BASE ADDRESS = $BF9000 ACIA 1 BASE ADDRESS = $BF9800 13 3.6864 MHZ 65C52 14 DACIA OFFSETS 21 TxD1 26 TxD2 14 18pf ISR1 = $0000 RxD1 28 = $0100 17 CSR1 RxD2 12 IER1 CR1/FR1 CDR1/ACR1 TDR1 IER2 = $0200 = $0300 RTS1 30 5 = $0400 RTS2 10 CR2/FR2 CDR2/ACR2 TDR2 RDR1 ISR2 CSR2 = $0500 = $0600 RDR2 = $0700 CTS1 31 6 TO OTHER DACIA CTS2 9 19 DTR1 27 DTR2 13 500 KHZ 4 DSR1 33 DSR2 7 TxC 15 T2CL $0800 T2CH= $0900 SHR = $0A00 = $0B00 ACR VIA OFFSETS ORA= $0000 ORB = $0100 DDRA= $0200 DDRB $0300 T1CL = $0400 TÍCH = 0500 TILL = $0600 T1LH = $0700 DCD1 32 22 RxC DCD2 B PCR = $0C00 25 = $0D00 IFR IER FRA DETAIL OF DACIA INTERFACE CIRCUITRY = $0E00 = $0F00 65C22 VIA 74F139 -Vec Vss PAO PA1 PAZ PA3 PA4 HOH Vs5 PAO PA1 PAZ PA3 PAY PAS PA6 CA PAT 9 10) PBO 11) PB1 12 PB2 PB3 19 PB4 PB 16 PB5 PB6 10 PB7 17 PB 18 PC CB1 19 TOD -R/W CB2 20 Vec IRQ Vec Drawn by Jeff Lavin (c) 1990 The Puzzle Factory 40 XTALI XTALO CLKOUT -DO D1 -DZ D3 -D4 DS Vss 4 30 VEF [HI C1+ C1- 5 20 8 PIN # R PINOUTS OF INTEGRATED CIRCUITS USED IN THIS PROJECT 65C52 DACIA MAX238 RS-232 XCVR CA1 RES 40 -Vec 31: Τζουτ CAZ NC - TiOUT BER/W RSO RZIH XTALI RS1 XTALO -RS2 RZOUT RS2 CLKO - R$1 T1IH D25 RS3 NO -RSO RiouT RES NO DSR2 R1M GND DCD2 UCU CTS2 DEFE DCD1 Ses To RTS2 Joo CTS1 nie IR02 IRW2 -RTS1 AUD RxD2 DTRZ TxD2 IXDC TxC D7 D6 DS D4- N QIZ OO UOZZEOTOK P N 5 U B D C 0 19 18 T3OUT R3IH R3OUT T4IM ТЧоит T3IH TRIN RYOUT F4 V- C2- 13. 02+ 1/2 74F139 G Y3 YZ Y1 YO B A 10 16 1A 1B 1Y0 1Y1 1Y2 1Y3 GND INB RO₂ RO₂ Vec R91 R92 مرااااااا 74L590 ELZA 13 2Y0 12V1 2Y2 -2Y3 10 EMNERG ▬▬▬▬ 14 -INA -OA -00 GND 08
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