19 Oct
2003
19 Oct
'03
8:49 a.m.
On Sunday, October 19, 2003, at 03:11 PM, Eric Smith wrote:
Tony wrote:
I'm not really sure what kind of type element my model 33 has. One
thing I did notice, however, is that the zero and the letter O are both
'switched'. Normally, on a modern system, the zero will have a line
through it, and the letter O will not. On this teletype, it is the
other way around. The keyboard and the type element both are like this,
and it is the only teletype I have seen that has them reversed. The
other model 33's I have seen pictures of on the 'net have normal zero
and O keys.
Ian Primus
ian_primus(a)yahoo.com
To avod further confusion, ASR33s are ASCII
machines (the Model 32 is
the
baudot equivalent). You don't need any code conversion for the ASR33.
You need at least a little bit of code conversion if you're using a
model
33 with the standard type element with equipment that uses modern
character
sets, as the model 33 uses the 1963 ASCII standard (ANSI X3.4-1963)
rather
than the later versions of X3.4 or the current ANSI INCITS 4-1986.
For instance, the modern caret (ASCII 0x5e, Unicode 0x005e) and
underscore
(ASCII 0x5f, Unicode 0x005f) characters are not available on the model
33.
And the model 33's up arrow and back arrow characters, 0x5e and 0x5f,
should
be translated to Unicode 0x2191 and 0x2190, respectively. I don't
recall
whether the model 33 escape key sends the X3.4-1963 escape code, 0x7e,
or the modern escape code, 0x1b. In modern ASCII and most
ASCII-derived
character sets, 0x7e is the tilde character.