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PICList Thread
'[OT]:help on old serial port pc cards'
2001\10\10@023105 by juan manuel garofalo

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this is pic related...somehow.

Up to now i was exchanging data between the pc and a 16f84 using two lines
from the parallel port. I wrote some x86 assembler to send the data
serially. I didn't use the standard serial port because my pc has only one,
and the mouse is hooked to it. But i found in the rubish bin some isa-serial
cards (yes, in the third world we're as rich as to throw these things away).
Problem is i don't have the manuals, so i'm lost as how to set up the
jumpers to change irq/addresses. Any hint as where i could find some info on
this stuff ??

Thanks in Advance.

juan.

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2001\10\10@050641 by wzab

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On Wed, Oct 10, 2001 at 03:30:20AM -0300, juan manuel garofalo wrote:
> this is pic related...somehow.
>
> Up to now i was exchanging data between the pc and a 16f84 using two lines
> from the parallel port. I wrote some x86 assembler to send the data
> serially. I didn't use the standard serial port because my pc has only one,
> and the mouse is hooked to it. But i found in the rubish bin some isa-serial
> cards (yes, in the third world we're as rich as to throw these things away).
> Problem is i don't have the manuals, so i'm lost as how to set up the
> jumpers to change irq/addresses. Any hint as where i could find some info on
> this stuff ??
>
Unless you know the model & manufacturer your chances are poor.
However try the following steps:
1. Check if there are some explanations on the upper overlay (probably
   you've already done it)
2. The IRQ selection jumpers are usually connected directly to the
  IRQ pads in ISA slot, so check which jumpers are connected to the
  IRQ related ISA contacts.
3. To find how the enable/disable and adress select jumpers work, use the
  almost empty PC (without other serial ports, game ports, parallel ports
  and so on - disable the on board ports) put your card inside and boot
  from the floppy    the simplest Linux kernel with serial/parallel/game
  port support. Than watch the messages on the screen to find which ports
  are enabled and at which address.
  You've got to reboot your systems with all reasonable jumper combinations
  to find how do they work.
  In fact the Linux kernel is the best "PC hardware analyzer" for me. I
  often use it for legacy hardware to discover the function of jumpers
  in old network cards, or to discover the disk geometry in very old (but
  >= 386) PC's (with BIOS'es which do not support reading of disk
  geometry).

--
                               HTH & Regards,
                             Wojciech M. Zabolotny
       http://www.ise.pw.edu.pl/~wzab  <--> spam_OUTwzabTakeThisOuTspamise.pw.edu.pl

http://www.debian.org  Use Linux - save your data and time

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2001\10\10@122132 by Ned Konz

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On Tuesday 09 October 2001 11:30 pm, juan manuel garofalo wrote:
> this is pic related...somehow.
>
> Up to now i was exchanging data between the pc and a 16f84 using two lines
> from the parallel port. I wrote some x86 assembler to send the data
> serially. I didn't use the standard serial port because my pc has only one,
> and the mouse is hooked to it. But i found in the rubish bin some
> isa-serial cards (yes, in the third world we're as rich as to throw these
> things away). Problem is i don't have the manuals, so i'm lost as how to
> set up the jumpers to change irq/addresses. Any hint as where i could find
> some info on this stuff ??

Note that the voltages that the serial port puts out aren't going to be
compatible with your 16f84 unless you:

(1) use a level converter (for instance, a MAX-232A) on the 16f84, or
(2) bypass the level conversion on the serial card.

For general experimentation it would make sense to do the second, so you
won't need level converters on every PIC board. But you may have to invert
the sense of the logic in your PIC program, or put in an inverter.

--
Ned Konz
currently: Stanwood, WA
email:     .....nedKILLspamspam@spam@bike-nomad.com
homepage:  http://bike-nomad.com

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2001\10\11@015817 by dr. Imre Bartfai

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Hi,

I am a Linux fan, too. However, I think, there is a better tool to
accomplish this task: it is the DIAGS package, from

http://members.hyperlink.net.au/chart

I think it IS the solution, with the modus operandi described by Wojciech
(experiment with jumpers on bare system).

I hope this helps.

Regards,

Imre


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On Wed, 10 Oct 2001, Wojciech Zabolotny wrote:

{Quote hidden}

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