Lee Privett wrote, on 28/Feb/11 00:37 | Feb28:
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,
This is the 4k7 I mentioned at the left of the 273 of the second row up
from the power supply (QL connector facing upward). Both resistors are
oriented power supply to QL connector.
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.
Connections in my previous email.
It should be clear from all this that we are talking bus mice (Atari and
Qimi) and not serial mice.
I wonder if the board image I have is Keith's?
Tony
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