Please help! My nec 720 floppy is dead! It connected with trump card.
I found a citizen OSDA -39C 720 floppy but it does not work as flp1_.
I want to know how can treat the jumbers to be ds0.
I have attach pic if it can help you.
Best wishes
Mike
HELP 720 FLOPPY AS FLP1_
Re: HELP 720 FLOPPY AS FLP1_
Any chance you can post pictures of :
The side - if any switches / jumpers are present there
The back where the connectors are
The underside
The top - showing the are where the connectors are
The location of the drive selects is usually in one of these areas. They may be switches, jumpers or even just solder bridge selects.
These cover TEAC drives - but you get the idea: https://embeddedsw.net/EMUFDD_TEAC_Jumpers.html
The side - if any switches / jumpers are present there
The back where the connectors are
The underside
The top - showing the are where the connectors are
The location of the drive selects is usually in one of these areas. They may be switches, jumpers or even just solder bridge selects.
These cover TEAC drives - but you get the idea: https://embeddedsw.net/EMUFDD_TEAC_Jumpers.html
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Re: HELP 720 FLOPPY AS FLP1_
Hi,
If you can take the bottom cover off the drive and does it resemble:
Which is a OSDA-90C
There are solder points JJ13 that has 1 0 with an arrow head pointing to 1, which could default to drive 1 (FLP2)
Maybe a short at J13 may give DS0 on J13
Only a guess, as I could not find the OSDA-39C at all.
If you can take the bottom cover off the drive and does it resemble:
Which is a OSDA-90C
There are solder points JJ13 that has 1 0 with an arrow head pointing to 1, which could default to drive 1 (FLP2)
Maybe a short at J13 may give DS0 on J13
Only a guess, as I could not find the OSDA-39C at all.
Regards,
Derek
Derek
Re: HELP 720 FLOPPY AS FLP1_
Is that a switch at "DSSW2" on the board - next to the stepper motor ?
If so - I suspect that's the drive select switch.
If so - I suspect that's the drive select switch.
Re: HELP 720 FLOPPY AS FLP1_
Yes there is a switch. I put it on 0 . But the trump card did not recognised it as flp1_ .
I need the location of jumbers on the upper side near the power
Mike
I need the location of jumbers on the upper side near the power
Mike
Re: HELP 720 FLOPPY AS FLP1_
It works!! I I put the jumper in third position.
Thank you very much Derek
Thank you very much Derek