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'Parallel Slave Port'
1997\03\18@184810 by Gary Marten

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Has anyone had problems with the IBF, OBF and/or IBOV flags getting set
erroneously when operating the parallel port in polled mode (not using
the PSPIF bit/interrupt) in the 16C64?

I see the IBOV flag getting set when the host is reading the PIC's
output register (in a polling loop), than when the host writes to the
PIC, the new data is not transferred to the PIC's input register and the
PIC ends up with the same data from the last legitimate write.

thanks,
Gary

1997\03\18@205513 by Gary Marten

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>Has anyone had problems with the IBF, OBF and/or IBOV flags getting set
>erroneously when operating the parallel port in polled mode (not using the
>PSPIF bit/interrupt) in the 16C64?
>
>I see the IBOV flag getting set when the host is reading the PIC's output
>register (in a polling loop), than when the host writes to the PIC, the new
>data is not transferred to the PIC's input register and the PIC ends up with
>the same data from the last legitimate write.
>
>thanks,
>Gary

1997\03\19@171023 by Michael N. Steen

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At 15.53 18-03-1997 -0800, you wrote:
>Has anyone had problems with the IBF, OBF and/or IBOV flags getting set
>erroneously when operating the parallel port in polled mode (not using
>the PSPIF bit/interrupt) in the 16C64?
>
>I see the IBOV flag getting set when the host is reading the PIC's
>output register (in a polling loop), than when the host writes to the
>PIC, the new data is not transferred to the PIC's input register and the
>PIC ends up with the same data from the last legitimate write.
>
>thanks,
>Gary
>
>
There is the same or a similar problem with the 16C74 PSP which is described
in an errata sheet.  There might be one out for the 16C64 too.  Try to look
it up on the Microchip home page.

Regards
Michael


'Parallel slave port'
1998\08\29@213523 by Frans Gunawan
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Any other microcontroller that has Parallel Slave Port like PIC? or can
connect directly to Computer's parallel port.
thanks
http://www.poboxes.com/f
f

1998\08\30@191236 by myke predko

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Frans Gunawan asked:

>Any other microcontroller that has Parallel Slave Port like PIC? or can
>connect directly to Computer's parallel port.
>thanks
>http://www.poboxes.com/f
>f

The Intel 8042 has the same feature (it was used on the PC/AT Motherboard as
the Keyboard controller).  I believe it was 8051 instruction set compatible.

I don't see it listed in the 1995 "Microcontroller Databook" and I know that
most "SuperIO" chips provide this function as built in to the ASIC (and some
even have the processor built in with the interface code).

Sorry, I don't know of any others,

myke

Hunter S. Thompson's quest for the American Dream, this week in the Book Room.

http://www.myke.com/Book_Room/book1a.htm

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