[vcf-midatlantic] Looking for a TI Silent 707 1200baud for the VCF Museum
jakari at bithose.com
Fri Oct 14 14:30:37 EDT 2016
On Fri, 14 Oct 2016, David Williams via vcf-midatlantic wrote:
> On 14/10/2016 15:00, Neil Cherry wrote:
>> On 10/14/2016 09:46 AM, David Williams via vcf-midatlantic wrote:
>> > Just tried dumping a text file to my 703 at 1200 baud and you're right,
>> > after about 500
>> > characters or so, it can't keep up with the input. Is there any way to
>> > put a delay after
>> > characters / line on Simh? I tested again by dumping the same text file
>> > via TeraTerm using
>> > a 15ms delay per character and 350ms per line and it seemed to work
>> > fine.
>> Don't the RS232 control leads take care of this?
> They should but I don't believe they are present of the RPi board
They sort of exist on GPIO #30 and #31, but their use is not standard, and
your typical level shifter only does TX/RX. I just went through this on a
recent project with a RPi connected to an (actual) VT100 -- Couldn't go
faster than 4800 baud and expect it to work at all, and even there users
typing on the terminal could cause spurious escape characters to be
I am thinking of redoing mine with a standard USB-to-serial dongle...
wouldn't get the Pi kernel console there, but I could still have a getty.
Incidentally the RF environment within the VT100 itself is more than the
Pi's 3.3v single-ended external I/O can handle. ;)
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