HardLabs

RC203-68000 PIO 1

MarkD833·RCBUS-68xxx·boards/RC203_PIO_Board/RC203-68000_PIO_1.kicad_pcb

RC203-68000 PIO 1 PCB layout, top view — open source board by MarkD833

About the RC203-68000 PIO 1 PCB

RC203-68000 PIO 1 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 24 components from 12 distinct parts.

Other key parts include the MC68230, 74LS138 and 74LS688. By type, the board carries 14 connectors, 4 ICs, 4 capacitors and 2 resistors.

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 A PI/T must have a clock present - either from the main clock source (RCBus pin 21) or the alternate CLOCK2 source (RCBus pin 61) - in order to function. The clock source for PI/T #1 is determined by the jumper position on J2 and the clock source for PI/T #2 is determined by the jumper position on J6.

RC203-68000 PIO 1, from the project README
From the project README

Main components on the RC203-68000 PIO 1

MC6823074LS13874LS688

RC203-68000 PIO 1 bill of materials (BOM)

24 components, 12 distinct parts — part numbers from the project's BOM.

QtyPartRefs
2
MC68230
68230FN
U1, U2
1
74LS138
U3
1
74LS688
U4
2
CONN_02X08_ODD_EVEN
Conn_02x10_Odd_Even
J1, J4
2
CONN_01X03
Conn_01x03
J2, J6
1
RCBUS_80PIN_68000
RCBus_80PIN_68000
J3
1
CONN_02X08_ODD_EVEN
Conn_02x06_Odd_Even
J5
3
CONN_01X08
Conn_01x08
J7, J12, J13
4
CONN_02X04_ODD_EVEN
Conn_02x04_Odd_Even
J8, J9, J10, J11
1
CONN_01X06
Conn_02x06_Odd_Even
J15
4
100N
100n
C1, C2, C3, C4
2
10K
R1, R2

RC203-68000 PIO 1 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.

RC203-68000 PIO 1: common questions

How big is the RC203-68000 PIO 1 PCB?

The RC203-68000 PIO 1 measures 101.6 × 53.3 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the RC203-68000 PIO 1?

24 components, from 12 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 RC203-68000 PIO 1 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 RC203-68000 PIO 1 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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