exxos's Atari, Amiga & retro forum

arkadiusz.makarenko wrote: 20 Mar 2021 18:01 May I ask about parts availability? Is it possible to get them as NOS or those need to be acquired from MSX?

Parts required are the YM chip (Exxos sells them), Z80A (widely available) and the VDP9958/VDP9938... those are still obtainable.

The rest is TerribleFire technology.

terriblefire wrote: 20 Mar 2021 18:16

arkadiusz.makarenko wrote: 20 Mar 2021 18:01 May I ask about parts availability? Is it possible to get them as NOS or those need to be acquired from MSX?

Parts required are the YM chip (Exxos sells them), Z80A (widely available) and the VDP9958/VDP9938... those are still obtainable.

The rest is TerribleFire technology.

What chip will be behind TerribleFire technology?

arkadiusz.makarenko wrote: 20 Mar 2021 19:55 What chip will be behind TerribleFire technology?

Either a XC95288XL or XC95144XL.

terriblefire wrote: 20 Mar 2021 19:57

arkadiusz.makarenko wrote: 20 Mar 2021 19:55 What chip will be behind TerribleFire technology?

Either a XC95288XL or XC95144XL.

What is plan for loading data, since cassette interface is gone?

arkadiusz.makarenko wrote: 20 Mar 2021 20:19 What is plan for loading data, since cassette interface is gone?

I'm told that most people use carts thesedays.. The board has 2 cart slots.

I guess we could also emulate a tape from the ARM?

Just grab Carnivore2 Cartridge,
There ist nothing better for MSX2 for now:

https://github.com/RBSC/Carnivore

8 Bit Dreams wrote: 20 Mar 2021 21:32 Just grab Carnivore2 Cartridge,
There ist nothing better for MSX2 for now:

I have repro carts from someone.. I know those everdrives are nice but... i like the physical changing of carts

@arkadiusz.makarenko .. I need some info on how you want the ARM wired up to the main CPLD/PSG for keyboard purposes.

I *think* We are bascially emulating the circuit on page 26/PDF29 of

http://map.grauw.nl/resources/system/msxtech.pdf

So if we want to wire this grid to this?


Then we will be using only GPIOs. So any pin can be set up and configured as needed. I think all pins on f7 are 5V tolerant.
Unless it has to respond in less than few uS, then it is not important.

i'll wire IOA of the PSG to Port A, IOB to port B.

I'm not planning to put the mux chips on unless you think thats important or would slow the software down?