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Re: [midatlanticretro] Terminal Emulator / Comms for IBM PC with 110b

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  • B. Degnan
    I have three versions, none has 110b. But that s ok. I am taking a different tact From the DOS prompt MODE COM1:110,N,8,1 (set comms to match ASR 33) CTTY
    Message 1 of 4 , Feb 8, 2013
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      I have three versions, none has 110b.

      But that's ok. I am taking a different tact

      From the DOS prompt
      MODE COM1:110,N,8,1 (set comms to match ASR 33)
      CTTY COM1 (use COM1 as the console)

      This will allow me to in theory do what I want to do. Still have to try it
      (after work).

      bd

      -------- Original Message --------
      > From: "Jeff Galinat" <jgalinat@...>
      > Sent: Friday, February 08, 2013 9:53 AM
      > To: midatlanticretro@yahoogroups.com
      > Subject: Re: [midatlanticretro] Terminal Emulator / Comms for IBM PC with
      110b
      >
      > Hi Bill,
      > I think Procomm supported 110 baud but I am not positive.
      >
      > You can download the last available MS-DOS version at
      > <http://www.aspectscripting.com/support/procomm/procomm243.zip
      > <http://www.aspectscripting.com/support/procomm/procomm243.zip>> and
      > give it a try.
      >
      > It looks like later Windows versions supported 110 baud so I don't see
      > why the MS-DOS version wouldn't.
      >
      > Regards,
      > Jeff
      >
      > On 2/8/2013 8:22 AM, B. Degnan wrote:
      > >
      > > Hi,
      > > Anyone have a terminal emulator that will do 110b, AND runs on the IBM
      PC
      > > XT? I can find terminal software but most don't have current loop /
      110b
      > > support setting options, that I have found. Yes I havve my XT hooked
      > > up to
      > > a teletype, all dressed up and nowhere to go.
      > > Bill
      > >
      > >
    • joshbensadon
      ... That should work. I was checking out the terminal program I often use, TELIX v3.20, it only goes down to 300b. But a programming trick I use in BASIC to
      Message 2 of 4 , Feb 8, 2013
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        --- In midatlanticretro@yahoogroups.com, "B. Degnan" wrote:
        >
        > I have three versions, none has 110b.
        >
        > But that's ok. I am taking a different tact
        >
        > From the DOS prompt
        > MODE COM1:110,N,8,1 (set comms to match ASR 33)
        > CTTY COM1 (use COM1 as the console)
        >

        That should work.

        I was checking out the terminal program I often use, TELIX v3.20, it only goes down to 300b. But a programming trick I use in BASIC to go higher than 9600b is to access the UART Baud Divider directly. Why not try it here??? I tested it on TELIX, first by shelling out to DOS from within TELIX. The baud does drop to 110b but only while you're shelled out, the moment you come back to TELIX, either TELIX or COMMAND.COM reverts to the 300b. So, I tried a different method to shell out. Using the "EDITOR" program in TELIX it works.

        Here's what I did. Go into TELIX SETUP <Alt-o>, Choose "Filenames and paths", Choose H for EDITOR, Enter "DEBUG" for your editor. Save and now from within TELIX, press <Alt-A> to activate DEBUG.

        In DEBUG, you can access the UART directly.
        Assuming COM1 with a base address of 0x3F8
        -i 3fb
        XX <-Note this value (Expect to see 03 = state of DTR,RTS,Etc)
        -o 3fb 83 <-the 83 is the XX value with the msb set
        -o 3f8 10 <-New divider for 110b = 0x410
        -o 3f9 4
        -o 3fb 3 <-Revert to previous value of XX
        -q <-Quit, return to TELIX and you're talking at 110b


        You can enter all these commands into a text file and pipe them into DEBUG, so all you'll have to do is press <Alt-A> to get your 110b.

        Cheers,
        Josh
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