Re: Canon PJ-1080A

Report: no joy with the adaptor as written.

One difference this time is that the Lisa takes a lot longer to decide that it's having trouble talking to the printer than it did before. With a "straight" cable, the Lisa's error dialog came up immediately. With the adaptor, the delay takes several minutes.

I suspect that all new behavior has to do with my inverting or not inverting certain essential signal lines. In particular, I note that Wikipedia says that parallel ports have a \BUSY pin (inverted), while the schematics James linked to show a BUSY pin (not inverted?). The Lisa might be waiting several minutes for the printer to change the state of BUSY, and timing out when that never happens.

Other factors may involve the cabling (about 1m unshielded ribbon to a patch box with spaghetti wiring implementing the adaptor, then 2.5m shielded cable to the printer---continuity checks OK, but there could be RF+other interference).

The printer also beeps at the beginning of every printout attempt, as well as on power-up and during boot. I suspect that this is because the Lisa is lowering \RESET during those moments, which "reboots" the printer. This may not be a problem.

I may have to postpone Lisa connectivity to this printer until such time as Santa gives me a logic analyzer... unless someone knows better or has some useful reference :-)

Cheers,
--Tom

On Wednesday, December 10, 2014 8:13:34 PM UTC-5, Tom Stepleton wrote:
>
> Wow. Not that anyone would suspect it, but you are not kidding. Based on
> those resources, here is my first stab at what an adaptor would look like.
> XX means leave unconnected. "PC parport" means a DB25 female port that you
> could plug PC printers into.
>
>
> *Lisa PC*
> *par- par-*
> *port port Remarks*
> *---- ---- -------*
> * 1 - 18 GND*
> * 2 - 19 GND*
> * 3 - XX {Lisa R/W, always W for printer}*
> * 4 - 20 GND*
> * 5 - 2 DATA_0*
> * 6 - 3 DATA_1*
> * 7 - XX {Lisa unused, not connected}*
> * 8 - 4 DATA_2*
> * 9 - 21 GND*
> * 10 - 22 GND*
> * 11 - 7 DATA_5*
> * 12 - 8 DATA_6*
> * 13 - 9 DATA_7*
> * 14 - 23 GND*
> * 15 - 1 /STROBE*
> * 16 - 11 /BUSY (may need to be inverted!)*
> * 17 - XX {Lisa CMD, unused by printer}*
> * 18 - XX {Lisa parity, unused by printer}*
> * 19 - 18 {Lisa open cable detect, must be low; tie to ground*}*
> * 20 - 24 GND*
> * 21 - 16 /RESET (may need to be inverted!)*
> * 22 - 5 DATA_3*
> * 23 - 6 DATA_4*
> * 24 - 25 GND*
> * 25 - 15 {Lisa /CHK printer fault (may need to be inverted!)}*
>
> * IDEFile uses this trick.
>
> Guess I'll give it a whack...
>
> --Tom
>
> On Wednesday, December 10, 2014 4:47:08 PM UTC-5, James MacPhail wrote:
>>
>>
>> It looks like the parallel port pinout of the Lisa is not the same as
>> the typical PC DB-25 parallel port, so a different cable will be
>> required...
>>
>> PC:
>>
>> http://upload.wikimedia.org/wikipedia/commons/e/e1/25_Pin_D-sub_pinout.svg
>>
>> Lisa: (last page of)
>>
>>
>> https://ia601602.us.archive.org/17/items/bitsavers_applelisasarallelInterfaceCard_668809/029-0176-A_Lisa_Parallel_Interface_Card.pdf
>>
>>
>> >I just got a Canon PJ-1080A, known in Lisa-land as the "Canon Ink
>> >Jet Printer." No manual was included.
>>
>> >I haven't had any success getting the Canon to work
>>
>

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