HardLabs

Pedisk2

mnaberez·pedisk2·pcb/pedisk.kicad_pcb

Pedisk2 PCB layout, top view — open source board by mnaberez

About the Pedisk2 PCB

Pedisk2 is an open source PCB design by mnaberez, published on GitHub. It is a 2-layer board measuring 143.3 × 77.5 mm, with 43 components from 24 distinct parts.

Other key parts include the 74HC00, 74LS32, 74LS139, 2716 and FD1793. By type, the board carries 13 ICs, 11 capacitors, 8 resistors, 2 connectors and 1 transistor.

It belongs with the retro computing designs in this gallery.

From the project

Reverse engineering the CGRS Microtech PEDISK II disk system for Commodore PET/CBM computers

This repository holds reverse engineering work on the PEDISK II from CGRS Microtech, a floppy disk controller for Commodore PET/CBM computers.

- rome800.bin` is a binary dump of the EPROM.

The .asm files can be assembled with the ACME assembler:

$ acme -v1 --outfile test.bin pedisk2.asm

It should assemble a binary that is identical to the original.

- Lee Davison did the initial disassembly of the ROM. - Jim Oldfield provided the 5.25" PEDISK disks from which the DOS code was recovered. - Mike Naberezny disassembled the 5.25" DOS code, adapted it for 8", and wrote the image tools. - Steve…

Main components on the Pedisk2

74HC0074LS3274LS1392716FD179374LS7474LS17574LS367231674HC1474LS0574LS161

Pedisk2 bill of materials (BOM)

43 components, 24 distinct parts.

QtyPartRefs
1
74HC00
U1
1
74LS32
U2
1
74LS139
U3
1
2716
U4
1
FD1793
U5
2
74LS74
U6, U13
1
74LS175
U7
1
74LS367
U8
1
2316
U9
1
74HC14
U10
1
74LS05
U11
1
74LS161
U12
1
2N2222
Q1
1
CONN_01X05
J2
1
CONN_02X17
P1
1
2316
MOUNT1
1
CONN_02X12
SOCKET1
1
8 5
W1
1
250 125
W2
4
CONN_02X01
W3, W4, W5, W6
Show 4 more
QtyPartRefs
11
C
C1, C2, C3, C4, C5, C6, C7, C8 +3
4
3.3K
R1, R2, R3, R7
3
150ohm
R4, R5, R6
1
4.7K
RP1

Pedisk2 design files

The KiCad project lives in the mnaberez/pedisk2 repository on GitHub; these links point at the commit this page was built from.

Pedisk2: common questions

How big is the Pedisk2 PCB?

The Pedisk2 measures 143.3 × 77.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Pedisk2?

43 components, from 24 distinct parts. The full bill of materials is listed on this page.

Where can I download the Pedisk2 design files?

From the mnaberez/pedisk2 repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Pedisk2 design in my own project?

The repository has no license, so all rights stay with mnaberez. Use it as a reference, and ask the author before reusing the design.

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