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C64 MIDI and ROM

1 year ago 696
  • Description
  • Documents
  • BOM
  • Attachments
  • Members
  • Comments

Description

Partial tested midi interface. Schematics based on https://groups.google.com/forum/#!topic/comp.sys.cbm/bPifzgUwfro

with 8k rom socket ($8000-9FFF). To use rom, close JP1 and JP2

design partial tested Rom found and running, midi detected by cynthcart v2.0 (note, running cynthcard V2.0 from 8k rom needs some crunching and relocation routine in rom as well)

Midi part not tested (I don't have midi keyboard)

found 2 issue, corrected at 21-apr-2018

  • power connection for U3 was connected to GND instead of VCC
  • J1 (rom select line) was connected to wrong pin of expansion port

Documents

Sheet_1

NEW_PCB

BOM

ID Name Designator Footprint Quantity Mounted
1 C64 Expansion Port E1 CARTRIDGE C64 1 Yes
2 68B50 U2 DIP24-600 1 Yes
3 JUMPER-2 JP1,JP2 JUMPER_SOLDER_1X2 2 Yes
4 27128 U1 DIP28-600 1 Yes
5 1k R11 1206 1 Yes
6 JUMPER-2 JP3,JP4 JUMPER2 2 Yes
7 PA_MIDI_OUT MIDI1 DIN-5 1 Yes
8 PA_MIDI_Thru MIDI2 DIN-5 1 Yes
9 PA_MIDI_IN MIDI3 DIN-5 1 Yes
10 OPTO_DARL_6N138S U7 8-SMD 1 Yes
11 220 R5,R2,R1,R4,R3 1206 5 Yes
12 270 R6 1206 1 Yes
13 74LS04D,653 U3,U6 SOIC-14_150MIL 2 Yes C5590
14 1N4148TA D1 DO-35 1 Yes C124481
15 VSLB3940 U8 LED-3.2-2.54MM 1 Yes C139835
16 300 R10 1206 1 Yes
17 74LS30D,653 U9 DIP14 1 Yes C5631
18 VC-81 X1 OSCILLATOR_DIP-8 1 Yes
19 100n C1,C2,C3,C4,C5 0603 5 Yes

Attachments

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Members

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