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68000 PIO BOARD

MarkD833·RCBUS-68xxx·boards/RC104_PIO_Board/68000_PIO_BOARD.kicad_pcb

68000 PIO BOARD layout, top view — open source board by MarkD833
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About the 68000 PIO BOARD

68000 PIO BOARD is an open source PCB design by MarkD833, published on GitHub under the CC-BY-NC-4.0 license. It is a 4-layer board measuring 101.6 × 53.3 mm, with 23 components from 11 distinct parts.

Other key parts include the 68230, 74LS138 and 74LS688. By type, the board carries 15 connectors, 4 ICs and 4 capacitors.

It belongs with the retro computing designs in this gallery.

From the project

My Motorola 68000 & 68302 processors (+ SIO, PIO & MFP boards) for the RCBus ecosystem.

The base address of each PI/T is determined by the placement of a jumper between adjacent pins on J7 & J12 (PI/T A) and J7 & J13 (PI/T B).

Note that the board does not have any protection built in to prevent damage to the PI/T chips if one of these pins is mis-used.

When fitting the 80-pin right angle connector, initially only solder a couple of pins at opposite ends of the connector so that you can make any adjustments if the board is not vertical when fitted to the backplane.

68000 PIO BOARD, from the project README
From the project README

Main components on the 68000 PIO BOARD

6823074LS13874LS688

68000 PIO BOARD bill of materials (BOM)

23 components, 11 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
68230
U1, U2
1
74LS138
U3
1
74LS688
U4
3
CONN_02X08_ODD_EVEN
Conn_02x08_Odd_Even
J1, J4, J5
2
CONN_01X03
Conn_01x03
J2, J6
1
RCBUS_80PIN_68000
RCBus_80PIN_68000
J3
3
CONN_01X08
Conn_01x08
J7, J12, J13
4
CONN_02X04_ODD_EVEN
Conn_02x04_Odd_Even
J8, J9, J10, J11
1
CONN_02X03_ODD_EVEN
Conn_02x03_Odd_Even
J14
1
CONN_01X06
Conn_01x06
J15
4
100N
100n
C1, C2, C3, C4

68000 PIO BOARD design files

The KiCad project lives in the MarkD833/RCBUS-68xxx repository on GitHub; these links point at the commit this page was built from.

68000 PIO BOARD: common questions

How big is the 68000 PIO BOARD?

The 68000 PIO BOARD measures 101.6 × 53.3 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the 68000 PIO BOARD?

23 components, from 11 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the 68000 PIO BOARD design files?

From the MarkD833/RCBUS-68xxx repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the 68000 PIO BOARD design in my own project?

It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.

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