Hello from Gregg C Levine
Right you are.
It happens that I'm using as a COM3/ASR3 device a USB2Serial device which normally is used for PDA communications. And the other end is my normal serial port. Both have handshaking turned off.
I'm surprised I'm not seeing any problems now. However when I start on my next series of tests that will require moving down to a slower baud rate to accommodate your suggestions. I might also track down my spare communications device. It's an ISA board which has on it space for two ports. But I'm only using one such, and it'll be strapped to COM2.
---
Gregg C Levine hansolofalcon@worldnet.att.net
---
"Remember the Force will be with you. Always." Obi-Wan Kenobi
> -----Original Message-----
> From: Shawn Fessenden [mailto:shawn@testech-ltd.com]
> Sent: Sunday, March 05, 2006 1:06 PM
> To: VRF
> Subject: RE: [vrf] SICL manual issues
>
> > in this case ASRL3 and do something
> > with the data, either store it and
> > then forward it to the instrument
> > connected to ASRL1
>
> If that translates into COM1 and COM3 then there definitely will be
issues
> as they both use the same interrupt (IRQ4). If you stay at or below
9600
> baud you can disable handshaking to get around it, or use Xon/Xoff
above
> 9600. This information applies to serial ports over an ISA bridge
only
> (i.e., almost any standard serial port on almost any PC as far as I
know.
> That could be dated information though. I haven't kept up with mobo
design).
> Virtual serial ports won't exhibit the same behavior. There are
probably
> also PCI serial port boards that won't exhibit interrupt
restrictions.
> -SHAWN-
>
>
>
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Right you are.
It happens that I'm using as a COM3/ASR3 device a USB2Serial device which normally is used for PDA communications. And the other end is my normal serial port. Both have handshaking turned off.
I'm surprised I'm not seeing any problems now. However when I start on my next series of tests that will require moving down to a slower baud rate to accommodate your suggestions. I might also track down my spare communications device. It's an ISA board which has on it space for two ports. But I'm only using one such, and it'll be strapped to COM2.
---
Gregg C Levine hansolofalcon@worldnet.att.net
---
"Remember the Force will be with you. Always." Obi-Wan Kenobi
> -----Original Message-----
> From: Shawn Fessenden [mailto:shawn@testech-ltd.com]
> Sent: Sunday, March 05, 2006 1:06 PM
> To: VRF
> Subject: RE: [vrf] SICL manual issues
>
> > in this case ASRL3 and do something
> > with the data, either store it and
> > then forward it to the instrument
> > connected to ASRL1
>
> If that translates into COM1 and COM3 then there definitely will be
issues
> as they both use the same interrupt (IRQ4). If you stay at or below
9600
> baud you can disable handshaking to get around it, or use Xon/Xoff
above
> 9600. This information applies to serial ports over an ISA bridge
only
> (i.e., almost any standard serial port on almost any PC as far as I
know.
> That could be dated information though. I haven't kept up with mobo
design).
> Virtual serial ports won't exhibit the same behavior. There are
probably
> also PCI serial port boards that won't exhibit interrupt
restrictions.
> -SHAWN-
>
>
>
> ---
> You are currently subscribed to vrf as:
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> Search the "unofficial vrf archive" at
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As part of my current project (No I'm not going to reiterate the whole
business! Just describe briefly what I am up to and why.) I need to
have VEE collect data streaming into a serial port, in this case ASRL3
and do something with the data, either store it and then forward it to
the instrument connected to ASRL1, or simply just forward it to ASRL1;
I needed to track down the specifics concerning how the cable in
question is wired. Which is a type F1047-80002 Cable a Null Modem
cable as it happens.
That information was normally found on pages 222 to 236 of the manual
named E2094. Which is the exact same one found with the delivered
IOLIB kit we use for VEE 7.52. Sort of. That manual is E2094N, and has
had that information removed.
Some judicious searching of the company website turned up a copy of
the original. However it was not listed by name, it was listed as
book.book and not classified. So the casual searcher who might not be
searching for it directly will probably miss it. It is actually named
manual_E2094_91001_sicl_users_guide_Apr2003.pdf. I consider this to be
a bug on the website. Normally I would report it to the webmaster
there, but I suspect they will just ignore it.
I am bringing it up in here because the information contained in the
two year old manual should not have been deleted from the manual
delivered with the IOLIB kit. This should be corrected. In both
places. The website location should be renamed, and the delivered copy
should be corrected.
Surprisingly enough I do have a copy of the aforementioned manual as
named as sicl.pdf from the FTP site from about the beginning of the
century. As it happens I do not recall the FTP site name or the
current location of said softcopy.
--
Gregg C Levine gregg.drwho8@gmail.com
"This signature was once found posting rude
messages in English in the Moscow subway."
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