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RC6502 VDU

tebl·RC6502-Apple-1-Replica·RC6502 VDU/RC6502 VDU.kicad_pcb

RC6502 VDU PCB layout, top view — open source board by tebl
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About the RC6502 VDU PCB

RC6502 VDU is an open source PCB design by tebl, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 99.1 × 99.7 mm, with 37 components from 21 distinct parts.

Other key parts include the MC6847, HM62256BLP-7, 74LS244, 74LS245 and 74LS374. By type, the board carries 12 ICs, 11 capacitors, 8 connectors, 5 jumpers and 1 crystal.

It belongs with the retro computing designs in this gallery.

From the project

An expandable SBC-version of the Apple 1 computer, easy to get started with and lot of cool stuff that can be added to it!

Since building and spending time with the excellent RC2014 computer kit, I wanted to build another one from scratch while learning even more about them along the way. Combine that with the love of old machines I'll never be able to own, and the missing knowledge to actually do that I instead started looking for books on how things work on a more basic level.

RC6502 VDU, from the project README
From the project README

Main components on the RC6502 VDU

MC6847HM62256BLP-774LS24474LS24574LS37474HCT13874LS3274LS08VDU_Port

RC6502 VDU bill of materials (BOM)

37 components, 21 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MC6847
U1
1
HM62256BLP-7
U2
2
74LS244
U3, U4
1
74LS245
U5
2
74LS374
U6, U12
2
74HCT138
U7, U9
1
74LS32
U8
1
74LS08
U10
1
VDU_Port
U11
1
3.579545 MHz
X1
1
RC6502_Backplane
J1
1
VDU_BASE
J2
1
VIDEO
J3
4
Hole
J4, J5, J6, J7
1
RCA_PLUG
J8
1
VDU_EN
JP1
1
OSC_EN
JP2
1
INT_ON_FS
JP3
1
CSS_SEL
JP4
1
INV_SEL
JP5
Show 1 more
QtyPartRefs
11
100nF
C1, C2, C3, C4, C5, C6, C7, C8 +3

RC6502 VDU design files

The KiCad project lives in the tebl/RC6502-Apple-1-Replica repository on GitHub; these links point at the commit this page was built from.

RC6502 VDU: common questions

How big is the RC6502 VDU PCB?

The RC6502 VDU measures 99.1 × 99.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the RC6502 VDU?

37 components, from 21 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 RC6502 VDU design files?

From the tebl/RC6502-Apple-1-Replica repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the RC6502 VDU design in my own project?

Yes, under the terms of its GPL-3.0 license, which tebl chose for the repository.

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