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Groups > comp.sys.apple2.programmer > #3116

Re: Puzzling the SSC Block

Newsgroups comp.sys.apple2.programmer
Date 2016-10-11 17:47 -0700
References <ntdoal$10r$1@dont-email.me> <d9c91587-edbf-4168-882d-8cd4442747ab@googlegroups.com> <ntg4ag$7b8$1@dont-email.me> <x5idnX0qc5ozS2bKnZ2dnUU7-adQAAAA@giganews.com> <ntjtuf$k8f$1@dont-email.me>
Message-ID <c0f1cbdf-acaa-4150-998f-f494acdcaffc@googlegroups.com> (permalink)
Subject Re: Puzzling the SSC Block
From roger.shimada@gmail.com

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On Tuesday, October 11, 2016 at 6:52:01 PM UTC-5, ultramagnus_tcv wrote:
> Do I understand?

Yes.

Hopefully you also have a 3.3V/TTL converter between the SCC and the Raspberry Pi, otherwise you may toast your Pi.

A voltmeter can be used to determine if an RS-232 device is wired as DTE or DCE by measuring TX. TX should normally be negative voltage. (TX goes positive when a one bit is sent.)

Live output lines should have voltage on them. When bi-color LEDs came out they were great to have on RS-232 breakout boxes.

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Thread

Puzzling the SSC Block ultramagnus_tcv <mikew@thecomputervalet.com> - 2016-10-09 10:39 -0500
  Re: Puzzling the SSC Block ultramagnus_tcv <mikew@thecomputervalet.com> - 2016-10-09 11:46 -0500
  Re: Puzzling the SSC Block roger.shimada@gmail.com - 2016-10-09 21:18 -0700
    Re: Puzzling the SSC Block ultramagnus_tcv <mikew@thecomputervalet.com> - 2016-10-10 08:16 -0500
      Re: Puzzling the SSC Block Michael J. Mahon <mjmahon@aol.com> - 2016-10-10 12:58 -0500
        Re: Puzzling the SSC Block ultramagnus_tcv <mikew@thecomputervalet.com> - 2016-10-11 18:52 -0500
          Re: Puzzling the SSC Block roger.shimada@gmail.com - 2016-10-11 17:47 -0700
            Re: Puzzling the SSC Block ultramagnus_tcv <mikew@thecomputervalet.com> - 2016-10-12 09:36 -0500
              Re: Puzzling the SSC Block David Schmenk <dschmenk@gmail.com> - 2016-10-12 09:00 -0700
            Re: Puzzling the SSC Block ultramagnus_tcv <mikew@thecomputervalet.com> - 2016-10-12 09:37 -0500
              Re: Puzzling the SSC Block roger.shimada@gmail.com - 2016-10-12 20:37 -0700
                Re: Puzzling the SSC Block ultramagnus_tcv <mikew@thecomputervalet.com> - 2016-10-13 21:01 -0500
                Re: Puzzling the SSC Block ultramagnus_tcv <mikew@thecomputervalet.com> - 2016-10-16 08:47 -0500
          Re: Puzzling the SSC Block David Schmidt <schmidtd@my-deja.com> - 2016-10-11 21:27 -0400
            Re: Puzzling the SSC Block ultramagnus_tcv <mikew@thecomputervalet.com> - 2016-10-12 09:31 -0500
              Re: Puzzling the SSC Block David Schmidt <schmidtd@my-deja.com> - 2016-10-12 11:27 -0400
          Re: Puzzling the SSC Block Michael J. Mahon <mjmahon@aol.com> - 2016-10-12 01:18 -0500
            Re: Puzzling the SSC Block ultramagnus_tcv <mikew@thecomputervalet.com> - 2016-10-12 09:39 -0500
    Re: Puzzling the SSC Block ultramagnus_tcv <mikew@thecomputervalet.com> - 2016-10-10 08:26 -0500

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