HardLabs

Z80VDC

lynchaj·nhyodyne·Z80VDC1/Z80VDC.kicad_pcb

Z80VDC PCB layout, top view — open source board by lynchaj
Simulate this board

About the Z80VDC PCB

Z80VDC is an open source PCB design by lynchaj, published on GitHub. It is a 2-layer board measuring 100 × 100 mm, with 63 components from 37 distinct parts.

Other key parts include the 74LS244, 74LS245, DOT CLK, 74LS32 and 74LS688. By type, the board carries 19 resistors, 16 capacitors, 13 ICs, 5 connectors, 2 jumpers and 2 diodes.

It belongs with the retro computing designs in this gallery.

From the project

Modular Backplane Computer

Based on MOS 6568 Video Display Controller (same as Commodore 128D 80 column mode)

Up to 64KB dedicated video RAM using two 41464 DRAM chips

Intended for Video Terminal Console, 80 column mode

Some graphics and color capability as well

Demostrated working with GBS-8200 VGA upscaler device however requires custom interface with analog color signals from pseudo-VGA interface (no not install VGA-F connector) and CSYNC signal. Route wire jumper from U7, pin 9 to U3, pin 6 and wire jumper from U3, pin 14 to CSYNC on connector (replaces HSYNC signal) to feed GBS-8200. Issues will be resolved in…

Main components on the Z80VDC

74LS24474LS245DOT CLK74LS3274LS68874LS0774LS0485684146474LS138

Z80VDC bill of materials (BOM)

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

QtyPartRefs
3
74LS244
U1, U3, U14
1
74LS245
U2
1
DOT CLK
U4
1
74LS32
U5
1
74LS688
U6
1
74LS07
U7
1
74LS04
U12
1
8568
U13
2
41464
U15, U16
1
74LS138
U17
1
2N3904
Q1
1
SPARES
P1
1
Z80 BUS BACKPLANE
P2
1
DAISY CHAIN
P3
1
SYNC
P4
1
CGA
P26
2
Jumper_NC_Small
JP1, JP2
1
INT SEL
K1
1
10K
RR1
1
IO PORT ADDR
SW1
Show 17 more
QtyPartRefs
2
LED
D1, D2
1
Ferrite_Bead_Small
FB1
1
INDUCTOR
L1
10
0.1u
C1, C2, C3, C4, C5, C6, C7, C8 +2
2
10u
C10, C11
3
0.22u
C12, C13, C14
1
10p
C15
2
470
R1, R2
2
4700
R3, R8
2
0
R4, R5
2
120
R6, R9
1
100
R7
1
330
R10
1
47
R11
1
82
R12
3
390
R21, R22, R23
4
820
R31, R32, R33, R34

Z80VDC design files

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

Z80VDC: common questions

How big is the Z80VDC PCB?

The Z80VDC measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Z80VDC?

63 components, from 37 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 Z80VDC design files?

From the lynchaj/nhyodyne repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Z80VDC design in my own project?

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

More boards in nhyodyne

Similar boards