Macintosh-HW/VideoMacPacHack
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Added README to VMPH design

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Andrew McPherson 2020-04-06 02:01:08 +01:00
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# VideoMacPacHack
These design materials are in the public domain, with no warranty whatsoever. See `documentation` on this repository for further design notes.
## Kicad files
* `VideoMacPac.pro`: Kicad project
* `VideoMacPac.sch`: Kicad schematic
* `VideoMacPac.kicad_pcb`: Kicad PCB design
* `VideoMacPac_schematic.pdf`: Schematic in PDF format
## Gerbers
This a 4-layer PCB which can be fabricated from the files in the `gerbers` directory.
* `VideoMacPac-F.Cu.gbr`: top copper
* `VideoMacPac-In1.Cu.gbr`: inner layer 1 copper
* `VideoMacPac-In2.Cu.gbr`: inner layer 2 copper
* `VideoMacPac-B.Cu.gbr`: bottom copper
* `VideoMacPac-F.SilkS.gbr`: top silkscreen
* `VideoMacPac-F.Mask.gbr`: top soldermask
* `VideoMacPac-B.Mask.gbr`: bottom soldermask
* `VideoMacPac-Edge.Cuts.gbr`: board outline
* `VideoMacPac.drl`: Excellon drill file
## Bill of Materials
| Name | Value |
| ------- | ------------------------------------ |
| C1-C8 | 0.1uF axial capacitors |
| J1 | 20-pin IDC header |
| J2 | 96-pin right-angle EuroDIN |
| R1-R4 | 4.7k resistors |
| RN1-RN2 | 3x47 ohm SIP resistor networks |
| RN3-RN4 | 4x47 ohm SIP resistor networks |
| U1 | XC2018-100-PC84 (faster can be used) |
| U2 | 74F521 (DIP) |
| U3 | 74AHCT1G00 (SOT23) |
| U4 | 74F244 (DIP) -- do not substitute |
| U5-U8 | MT42C4064Z-12 (faster can be used) |
| U9 | TPS2030 (DIP) |
| X1 | 36MHz 4-pin oscillator |
| X2 | 50.35MHz 4-pin oscillator |
| X3 | 57.2832MHz 4-pin oscillator |