Here is one interesting part of the documentation from Dilwyns site (thanks for
pointing this out Keith) as you can see it mentions three ICs needed to get the
mouse working and a small fee...
Adding a Mouse to an Issue 3 SuperQboard
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
I have now managed to add the extra bits to my Issue 3 super- Qboard to get the
mouse working. It needs two 74HC74s in the spare 14 pin spaces, and a 74HC244
in the 20 pin space. A 9 pin D type plug fits by the 74HC74 at the power supply
end of the board, and a 4K7 ohm pull up resistor has to be fitted near the pin
1 end of the 4077 IC (it has no connection with the IC). The ICs fit in the
same direction as all the others on the board, but some boards have extra holes
at the ends of the ICs where decoupling capacitors have been left out, so the
IC position should be checked with its power supply pin positions. A different
version of the ROM is required, and I can provide this for a small fee for
QJUMP's copyright. The latest version of the pointer interface software from
QJUMP should be used, and not the ROM resident code in the superQboard. If this
ROM is fitted without the mouse components present, the QL will 'freeze' on
initialisation. The cure is to fit the 74HC74 at the
power supply end of the board, or tie the 5 and 9 pin positions of this IC
space to earth. Alternatively the new level-2 ROM, available from Jochen Merz,
can be fitted. If you fit a board mounted plug you will need to rewire the
Atari mouse socket to suit, as Sandy didn't use the same pinout as on the QIMI,
but I can provide a copy of the connections. I rescrambled the lead to my plug
so as to be compatible with my QIMI set up.
Lee
- Back to the QL-
> What I don't know is what the missing chips should be ? So does anyone
> have a schematic, or failing that a good picture of the circuit board so
> that I can see what the missing components are.
>
> My goodness,
Quite by chance I had a quick lurk while doing something else
and look what has come up!
Check Dilwyn's site /docs/hardware/index.html "Keith Mitchell Hardware
Documents" hw.zip.
After so many years I am not able to remember any other details, but I
should have
some ROM dumps some-where in an old backup.
Best wishes to all,
Keith.
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