Dual processor Dual processing

Logically Can say as MSX and APPLE relationship as under.

But, in fact MSX hold everything of APPLE II have So, it would be more actual states.

MSX have 512KB and APPLE IIe have 128KB

Now the MSX can approach every location of APPLE IIe but, APPLE IIe can't approach to MSX I/O device.

As the picture, MSX can use APPLE IIe memory not only for reading but for writing too.

Even 65C02 running time, Z80 can access any location of APPLE IIe memory.

The both system connected hybrid states.

I will show it how does it work.

On APPPLE IIe side,

It will put 0-255-0 number into 36800 location of memoroy and looping it.

MSX side,

It will just display the memory data.

Simply just peek the location (Location number isn't the same but same physical location)

What would be happen?

If MSX and APPLE IIe runs at the same time, The number will be transfer for other system.

So, run both of program.

On the MSX, It shows decay numbers..

It is the data from 65C02(APPLE IIe) Giiven.

Some number are skipped due to the timing of scrolling of MSX screen.

As the above program, it can communicate just simply using PEEK and POKE.

Ther is no IO access routine nor receiving protocols.

This results are the harmony of the BUS integration for MSX with APPLE IIe.

Looks Good, at least for me. :D