HardLabs

Burstcart via

ytmytm·plus4-burstcart·burstcart-via/kicad/burstcart-via.kicad_pcb

Burstcart via PCB layout, top view — open source board by ytmytm

About the Burstcart via PCB

Burstcart via is an open source PCB design by ytmytm, published on GitHub. It is a 2-layer board measuring 56 × 91 mm, with 23 components from 16 distinct parts.

Other key parts include the 27C512, 74LS74, 6522, 22V10 and 74LS126. By type, the board carries 6 ICs, 5 capacitors, 5 resistors, 3 connectors, 3 jumpers and 1 diode.

It belongs with the retro computing designs in this gallery.

From the project

Burst (fast serial) capable cartridge for Commodore C16/116/Plus4

This Plus/4 cartridge implements both fast serial burst for 1570/1571/1581 drives and a parallel connection for the 1541 drive, enabling high-speed data transfers.

The project started as a response to a question from Plus/4 World Forum.

In order to use the Burst (fast serial) protocol as implemented on the C128, we need a bidirectional hardware serial port.

The published version uses VIA 6522 chips, which are still relatively easy to obtain. The additional logic addresses a VIA hardware bug that can lead to framing errors and lost bits when the serial port is externally clocked, as is the…

Burstcart via, from the project README
From the project README

Main components on the Burstcart via

27C51274LS74652222V1074LS126C16_CARTRIDGE

Burstcart via bill of materials (BOM)

23 components, 16 distinct parts.

QtyPartRefs
1
27C512
U1
1
74LS74
U2
1
6522
U3
1
22V10
U4
1
74LS126
U5
1
C16_CARTRIDGE
U$1
1
IEC
J1
1
BURST
J3
1
PORTB
J4
1
Jumper_3_Open
JP1
1
Jumper_3_Bridged12
JP2
1
Jumper_3_Bridged12
JP4
1
BAT43
D1
1
10uF
C1
4
100n
C2, C3, C4, C5
5
3K3
R1, R2, R3, R4, R5

Burstcart via design files

The KiCad project lives in the ytmytm/plus4-burstcart repository on GitHub; these links point at the commit this page was built from.

Burstcart via: common questions

How big is the Burstcart via PCB?

The Burstcart via measures 56 × 91 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Burstcart via?

23 components, from 16 distinct parts. The full bill of materials is listed on this page.

Where can I download the Burstcart via design files?

From the ytmytm/plus4-burstcart repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Burstcart via design in my own project?

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

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