Aww, Dave, you know that you're not suppose to talk about caressing your flux capacitor in public

Protecting the 8301 ULA Rather than just using 5.6V Zener diodes, adding some fast signal diodes can improve the protection. Use 1N4148 or similar. Connect a diode between 0V/GND and the signal pin, then another diode between the signal pin and the +5V power rail. Do this for all the signals that go...

The Sinclair PC200 does. :P That's a repackaged Amstrad PC, which is an IBM compatible! But I know that you know that I know that you know that! And of course, every IBM compatible of that era (and later of course) has to boot off a bootable drive (unless it's dropping straight into a IBM/M$ BASIC ...

And there's more...

From D‪ilwyn‬

Thank you

Mark

Dave wrote:Rich's company services clients of more than just the QL.

I don't think any Sinclair systems (ZX81, ZX Spectrum) care about boot sectors on SD cards...

Hmm, am I the odd one out, having a uncased QL board connected to a CF card (mind, a bare keyboard matrix is a pain to use). And an Aurora with an QLSD. Also currently not in a case... (using a PC keyboard).

So Sinclair's routing the RGB video signals to the expansion connector was a complete waste of time and resources. I can kinda understand why an expansion may need the sync signals, but I can't think of any practical and useful reason for making the RGB video signals available on the expansion conne...

So were there any expansion cards that actually used the RGB video line connections on the expansion connector?

Mark

Does it make use of the existing RGB video output pins of the 8301?

Mark