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Code related to the Motorola 68000 microprocessor.

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// repository documentation

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# 68000 single-board retro-computing project
Designs and code related to the Motorola 68000 microprocessor.

## Building the project hardware
1. [Order the board](TS2/v2.1/README.md)
2. Order the parts from the [bill of materials (BOM)](TS2/v2.1/bom.pdf)
3. Order the two FT232 USB -> serial breakout boards
4. Order the chip sockets:

| Layout    | Qty   | Width (inches)    | Notes                                 |
|:---       | ---:  | ---:              |:---                                   |
| DIP-8     | 1     | 0.3               | For the 555                           |
| DIP-14    | 17    | 0.3               | For a lot                             |
| DIP-16    | 8     | 0.3               | For even more                         |
| DIP-24    | 2     | 0.6               | Double width: for serial interface    |
| DIP-28    | 8     | 0.6               | Double width: for RAM & ROM           |
| DIP-64    | 1     | 0.9               | Triple width: for CPU.                |

The DIP-64 can be a little hard to obtain, you could cut DIP-40 sockets to same effect. However, it's inadvisable to 
directly solder the CPU directly to the board. If the heat damages the chip, there's 64 pins to de-solder.

5. Solder in the sockets. Applying some soldering flux can be of great help: the IC soldering pads are tiny, mainly to 
save space on the board.
6. Solder in the rest of the components
7. [Flash the ROM chips](http://jefftranter.blogspot.com/2016/12/building-68000-single-board-computer_7.html)
8. Fit all ICs into their sockets
9. Connect power (preferably through a lab bench power supply)
10. Connect a PC to the board through USB
11. Watch it boot
12. Have some retro-computing fun!

The hardware design is Open Source Hardware, licensed under the The TAPR
Open Hardware License. You are welcome to build the circuit and use my
PCB layout.
See https://web.tapr.org/OHL/TAPR_Open_Hardware_License_v1.0.txt

Some code here is entirely written by me and others are ports of
existing software. Software written by me is released under the
following license:

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

Documentation written by me is licensed under a Creative Commons
Attribution 4.0 International License.
See https://creativecommons.org/licenses/by/4.0/

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