What IC manages the msx printer interface (Centronics, for friends)? [PSG, PPI, or whatever?].

Surely we can write a byte to the port, but is this port bi-directional? (I want to read a byte)

Can you post a sample asm for reading e writing a byte?

Thx a lot!

It's possible ( MSX<->MSX) or( PC<->MSX)connection, using it:

http://lpadial.aamsx.org/pagef.HTM

It's a true, bidirectional port for msx.

Quote:

It's possible ( MSX<->MSX) or( PC<->MSX)connection, using it: http://lpadial.aamsx.org/pagef.HTM It's a true, bidirectional port for msx.

Thx!,
Sorry, cannot understand if i need additional hardware or only i need to create a cable.
Did anyone have tested the speed of this connection? how kb / sec is?

you need the LPE parallel bidirectional port cartidge.

regular MSX parallel is out only (except 1 pin iirc)
most electronic hobby projects in the old days used the printerport for sending data while using 6 bits input from the joystick port.

>Did anyone have tested the speed of this connection? how kb / sec >is?

Yes, for example: PC->MSX, maximum throughput (without data checksum) is 128kb/sec.
A 512kb rom in 4 seconds

It can be made bidirecional, if you can find me a spare bit on the parallel port to use as a direction indicator. The circuit is already there!

Quote:

It can be made bidirecional, if you can find me a spare bit on the parallel port to use as a direction indicator. The circuit is already there!

But, a question: What IC controls the Parallel port on MSX? is the PPI, PSG or what?

PPI, which can be built into an MSX engine.

The S1985 documentation shows the external circuit necessary for it to support a bi-directional port. It's not implemented in my machine though.