Description

An extension module for the 12+1 Stegosaur backplane to support MSX Cartridges

Tired of slow load times for your games? Miss the days of flicking the power button and having your game instantly running? Well perhaps this kit is for you. Pair the Slot Extension with a MSX configured build, and you can load cartridge based games and software with the simple of a flick of the power button.

This module attaches to the right most slot of the 12+1 backplane and gives your system two 50pin MSX card connectors slots. It include required decoding logic for addressing the slots as per the MSX standard.

It includes optional support for an on-board DC converter to step up the 5V from the backplane to +12/-12 voltages.

Once installed and operating on a MSX configured system, you can boot up original 1980’s MSX cartridges or install new modern release cartridges from places such as https://www.msxcartridgeshop.com/

Or perhaps you can select the optional MSX Cartridge 16K/32K ROM board and flash your own (or downloaded) game and enjoy the era of instant gaming.

Key features

2 MSX 50pin compatible cartridge slots
Indicator LEDs when a cartridge is inserted and powered.
Optional DC converter to supply +12/-12V*

Key difference with Yellow MSX

Description	Yellow MSX Version	Green Stegosaur Version
Colour	Yellow	Green
On board LEDs	5mm LEDs	3mm LEDs
Card Edge Connectors	PCB screw mountable	Equivalent alternative without screw mount support
Optional 16/32K Cart	Yellow Version	Yellow Version (with Green coming soon)

What’s included?

The full kits includes everything you need (PCB, passive components, connectors, and the ICs).

The optional +/-12VDC converter, as with all parts, may be supplied with an alternative of similar specifications.

Please note that mounting stand-offs are not supplied.

What else do I need?

The MSX Cartridge slot extension is designed to work in a build with the Stegosaur MSX Modules. Your system needs to be able to boot as a MSX system.

You need at a minimum:

Stegosaur 12+1 Backplane
Stegosaur MSX Series Memory Module
Stegosaur MSX Series Video Module
Stegosaur MSX Series Game Module
Stegosaur MSX Series Keyboard/PPI Module
Stegosaur Turbo CPU Module (or compatible Z80 CPU module)

Product Details

For full product description, construction notes and other help – please see the main guide page at: https://www.dinoboards.com.au/stegosaur/cart-extension/

Disclaimer Notes

Please note that this is a kit, produced by a non-expert (me) for hackers, DIYers' and retro lovers, to tinker with. Please exercise caution and follow good safety practices. You will be working with sharp knives, a hot soldering iron, and small metal components. Be mindful of the risks involved in the build process. I will do my best to answer any questions you may have.

This kit is provided as-is, with no guarantees or warranties. By assembling and using this kit, you acknowledge that you do so at your own risk. The creator cannot be held responsible for any damage, injury, or loss that may occur during the assembly or operation of this kit.

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Stegosaur MSX Dual Cart Extension