RPi2 and MSX

Paragon (1570)

28-06-2015, 01:38

I would like to experiment with RPi2 working as an add-on to MSX using standard cartridge slot.
Did anyone connect RPi2 to MSX? How do you handle 3v3 and 5v bidirectional conversion?
Is it enough to use 3x 74hc245 to connect 8 data, 8 address and /wait, /iorq, /wr and /rd to RPi2 gpio pins?
Is it better to just use 1k resistance and a diode as proposed here?
I found this awesome blog post on spanish sub-forum: link, but it is for ardunio, which is slow.
Any help is appreciated, as I don't have any experience with electronics and would love not to destroy either MSX or RPi2.

By x-nen Aivalahostia

Paragon (1559)

30-06-2015, 20:08

I found this ttps://www.youtube.com/watch?v=Rkyj-8kbZ1M&feature=youtu.be

it uses a rpi to execute mame games and msx keyboard to control the player,

By Manuel

Ascended (19676)

30-06-2015, 21:06

How do you know it's running mame and an MSX keyboard?? It doesn't look like it... It could also be the GFX9000 version of G&G that's being made...

By AxelStone

Prophet (3199)

30-06-2015, 22:01

Definitively it's not a good deal to waste our precious MSX keyboards using a Rpi2 that can be operated by itself simply pluggin an usb keyboard / pad.

By jltursan

Prophet (2619)

30-06-2015, 22:36

It's real, it's a TurboR case & keyboard interfaced to a RPi. Guillian demoed this the past MadriSX.

By syn

Prophet (2133)

30-06-2015, 22:50

Hah good job i think this looks pretty cool

A few years ago (before rpi) I thought it would be fun to build some mini-itx board into the case of a broken msx.. but nowadays I think it is ethically wrong to waste a msx like that.. since you could have replaced the case with a working msx with a crappy damaged case

By Guillian

Prophet (3528)

01-07-2015, 00:38

Actually it is a real (working) turbo R, with a cartridge that comunicates with a Raspberry Pi.

Ghosts'n goblins
Cadillacs and dinosaurs
Castlevania Symphony of the night
Metal Gear Solid

By Randam

Paragon (1431)

01-07-2015, 01:04

Very cool!!! Is it planned to be a one off or will those be sold somewhere in the future?

By Guillian

Prophet (3528)

01-07-2015, 10:12

Thanks!
I have no plans of producing and selling the cartridge. It is just a proof of concept project.

By Randam

Paragon (1431)

01-07-2015, 19:04

That is too bad. Cool proof of concept!! And hopefully you'll reconsider somewhere down the line.

By dhau

Paragon (1570)

02-07-2015, 16:25

Can you share how you connected RPi to MSX? I need fast bi-directional transfer rate (like 100kb/s).