Re: BLU on a 2/10: RX but no TX?

PS: if anyone would like to get that image into an emulator somehow, here is serial number information that might come in handy.

SERIAL NUMBER OF THIS LISA
  XXLLYYDD DUUUUXXX PPPNNNNN XXXXXXXX   FF108315 905040FF 00102905 05305D2C X - UNUSED/UNKNOWN LL - PLANT LOCATION YY - YEAR MANUFACTURED DDD - DAY OF YEAR UUUU - UNIT NUMBER
PPP - APPLENET PREFIX NNNNN - APPLENET NO. --Tom

On Saturday, January 4, 2014 2:50:42 PM UTC-5, James MacPhail wrote:
>
>
> There have not been any reports of BLU not transmitting, so I expect
> there is a hardware problem.
>
> You could put your voltmeter between pin 2 of the serial port and
> ground (eg. the chassis) and see if the voltage fluctuates when you
> type in the Terminal Test. You may need to set your meter to mV AC to
> see this, or it may be visible on the 20V DC range. Setting the SCC
> to the slowest speed possible may help make the voltage change
> visible. (eg. 9600 baud in the current version of BLU).
>
> Yes, BLU will back up ProFiles attached to a parallel port card.
>
> The I/O board ROM and drive swap are all that is required to switch
> between 400k and 800k.
>
> The hardware to support LocalTalk is original to every I/O board, so
> no modifications were required.
>
>
> >Is there any good reason why BLU should fail to transmit data from
> >Port B of a 2/10, even while data reception is fine (or so the
> >terminal test screen would indicate)?
>
> >a 400K drive was swapped back in place of the 800k drive,
> >along with the corresponding I/O board ROM. I don't know if that's
> >relevant, but I suppose there's a chance that the backwards
> >reversion to a Lisa was not complete, and modifications to the
> >serial port intended to support e.g. LocalTalk are still in place.
>
> >will BLU back up ProFiles attached to a parallel port card?
>

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