mirror of
https://codeberg.org/hkzlab/TK2000_bus_extender.git
synced 2025-12-25 17:12:30 +11:00
41 lines
2.5 KiB
Markdown
41 lines
2.5 KiB
Markdown
# TK2000 BUS EXTENDER
|
|
|
|
## DISCLAIMER
|
|
|
|
Any use of this project is **under your own responsibility**.
|
|
You will be responsible of checking the correct construction and functionality of your board.
|
|
By using this project You will agree that I cannot be held responsible if it will destroy any of your devices, damage your computer, burn down your house or whatever.
|
|
|
|
## Introduction
|
|
|
|
This board is a bus extender for the TK2000 computer, and allows plugging in up to 3 expansion boards into it.
|
|
|
|
Differently from what happens in the Apple II, the TK2000 does not differentiate between the expansion slots: every connector brings out the same signals, and it's up
|
|
to the boards installed in there to decode the signals appropriately and decide which memory/IO range to use.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
## Hardware
|
|
|
|
The board was designed with [KiCad](https://kicad.org/) EDA.
|
|
|
|
### Bill of Materials
|
|
|
|
| Component | Qty | Type / Value | Notes |
|
|
| ---------------------- | --- | ------------------------------------------------------- | -------------------------------------------------------------------- |
|
|
| P2, P3, P4 | 3 | 50 pin (2x25) female edge connector, 2.54mm pitch | https://aliexpress.com/item/1005008354411366.html |
|
|
| P7 | 1 | 50 pin (2x25) pin header | Optional, debug only |
|
|
| C1 - C6 | 6 | 10uF/25V+ 1206 MLCC capacitors | |
|
|
| F1 | 1 | 1.5A 1812 fuse | |
|
|
| F2, F4 | 2 | 0.5A 1206 fuse | |
|
|
| F3 | 1 | 0.25A 1206 fuse | |
|
|
|
|
Bridge JP1, JP2, JP3 and JP4 to connect the DMA and IRQ passthrough chains.
|
|
|
|
### Ordering the boards
|
|
|
|
You can order the board for this project at [PCBWay](https://www.pcbway.com/project/shareproject/TODO.html) and support me or download
|
|
the gerbers and have them printed wherever you like!!!
|