home *** CD-ROM | disk | FTP | other *** search
/ Frozen Fish 1: Amiga / FrozenFish-Apr94.iso / bbs / alib / d5xx / d520 / ioboard.lha / IOBoard / ioboard.lzh / IFF / IO_Exp_Diag.iff (.png) < prev    next >
IFF Interleaved Bitmap Image  |  1991-01-28  |  32KB  |  640x768  |  1-bit (2 colors)
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 EXCHAN ...