hkzlab/TK2000_bus_extender
1
0
Fork 0
mirror of https://codeberg.org/hkzlab/TK2000_bus_extender.git synced 2025-12-25 17:12:30 +11:00
Code Issues Projects Releases Packages Wiki Activity
BUS extender for the TK2000 home computer
21 commits 1 branch 0 tags 1.5 MiB
Find a file
hkz 1b38a5e82f Add PCBWay order link
2025-08-12 14:35:22 +02:00
ext/TK2000.pretty Enlarge pads on connector edge 2025-06-29 17:24:13 +02:00
gerbers Remove old rev.0 2025-08-12 14:25:03 +02:00
pics Fill in README and pictures 2025-08-12 14:21:36 +02:00
.gitignore Initial commit 2025-05-22 15:48:03 +00:00
fp-lib-table Add extender PCB 2025-05-22 21:57:46 +02:00
README.md Add PCBWay order link 2025-08-12 14:35:22 +02:00
sym-lib-table Add extender PCB 2025-05-22 21:57:46 +02:00
TK2K_EXTENDER.kicad_pcb Enlarge pads on connector edge 2025-06-29 17:24:13 +02:00
TK2K_EXTENDER.kicad_pro Slightly increase the edge connector size 2025-06-13 19:29:56 +02:00
TK2K_EXTENDER.kicad_sch Update gerbers 2025-05-23 08:28:46 +02:00
TK2K_EXTENDER.pdf Generate rev1 2025-06-24 17:18:04 +02:00

README.md

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.

Empty adapter connected to a TK2000 clone

Adapter with two installed boards

Hardware

The board was designed with KiCad 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 and support me or download the gerbers and have them printed wherever you like!!!