I have a Turbo A1GT witch I bought second hand. From the moment I have it I
have troubles with the floppydrive. Now I have some time to sort out what to
do about it and I opened the case. It is the same problem as with so many of
you that the belt of the drive is slack. I can fix that i think by going to
the nearest electronics shop, but I found some curious things inside the
Turbo R:
First there are wires connected to the 2nd floppy connector on the mainboard
going to a 15 pin "pc-joystick" connector on the back.
Second, there is a 1Mb pc SIMM module with a homemade PCB with the texts
F.U.C. JIPE OCT1994.
Third, a small homemade PCB with 4 74HCTXXX chips on it connected with a lot
of wires all over de mainboard.
And now a major qlue: Fourth, several stickers from Sunrise Hardware
service.
I think the small PCB is part of the SIMM convertermodule.
Now I have a few questions:
1) How do I connect an external floppydrive on that 15 pin D-sub female
connector and can I make the drive select switchable between 1st and 2nd
floppy?
2) Will I have to use a floppydrive with its own powersupply or does this
come with these wirering?
3) What is happened to the original 512kb memory? The total memory reported
while booting is 1Mb and that is same as the 1Mb SIMM.
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