Are those other images really from an Enterprise?

Yes! You can download it and view on real Enterprise (if you buy again one ).
IstvanV wrote the image converter program for PC, and I the viewer for Enterprise. Most of these pictures use a 16 colors attribute mode. The trick is the new palette in every LPT line and also using interlace mode to double the vertical resolution.

Ep128emu is accurate, but still doesn't emulate your mouse interface...

On the other side it emulates the Spectrum Emulator.

Sorry LGB. I've not mentioned your emulator because is not as easier to make it work. But, could you put here a link to a disk image of one of these slide-shows that Zozo is speaking?

Interlace slideshow also can work with jsep?

Sorry LGB. I've not mentioned your emulator because is not as easier to make it work. But, could you put here a link to a disk image of one of these slide-shows that Zozo is speaking?

Ouch no need to say sorry, I wanted to express some kind of "funny situation" about the features of ep128emu and jsep, what I've just described in response of Zozo's post.

Now I have this conversation with Tim Box:


Hello again Tim, I'm Gustavo from Spain.

Today I managed to make a copy of your Boxsoft mouse interface only with
optocouplers, resistors and one transistor. I send here the scheme of your
 adapter and of my clone.

My question is: when you created it, was there optocouplers?

I say it because your project is for me a very imaginative one, with the
 principal objective of isolate the Enterprise odd Joystick connector. And
you achieved it cheating the OR gates....

Also the RTS signal drawn from the Serial port is isolated again with a
spare OR gate.

For me is impressive...

Gustavo.




Hello Gustavo

Really I do not remember why the design was made that way. What port was
it plug into?

*Edit* Ok its coming back now Was the main port a joystick one? So
the other was needed to strobe the mouse to get it to send the data out...

There were no opto couplers. It was all just TTL logic. I really did not
know much about electronics back then. Peter helped me out.

My only memory was that it was to interface to a 4bit CPU in the mouse.
You requested the movement since the last request and it sent it in 2
nibbles.

So looking at your schematic, I have not checked the logic fully but see
no obvious reason for it not to work. Only thing I will say is that It
will draw a lot of power. The Leds in the opto's will take a lot of
power. I hope the Mouse can sink that kind of current.

Cheers

Tim



Thanks for answer me.

My clone works... almost like yours(can be better...). The Enterprise seems unaware of the power drawn by the six optocouplers.

The problem with the Enterprise game port is that the common for the buttons is positive, as opposed to the Atari or MSX ports, where the 0v is the common.

On the other hand, the mouse acts exactly as if that nibbles where the direction buttons pressed on a joystick, directly shorting from the pins to ground. No problem at that.

Thanks.

[
Two enduring memories are of Peter Hiner who wrote ZZZip. He is one clever guy who was really a great chap to boot. And Kevin Richards who the first time he wrote to me ended with Kevin Richards 14.5 years old.

Tim
[/quote]

Haha! Hi Tim, great to see messages from you. That was a long time ago! I'm Andrew not Kevin, but I probably did put my age at the end of a letter. I remember being very worried about writing letters to people and them thinking I worked in computers, but was still at school!

Andrew