From mboxrd@z Thu Jan 1 00:00:00 1970 From: aap@papnet.eu (Angelo Papenhoff) Date: Wed, 22 Nov 2017 22:33:49 +0100 Subject: [TUHS] First CRT terminal on Unix? In-Reply-To: References: <2B43893B-29EA-460C-9426-9C0127B7F5D8@retrocomputingtasmania.com> <1511368433.1204138.1181170712.5C35EA76@webmail.messagingengine.com> Message-ID: <20171122213349.GA9067@indra.papnet.eu> On 23/11/17, Nigel Williams wrote: > On Thu, Nov 23, 2017 at 6:40 AM, Nigel Williams > wrote: > > I suspect the VT05 was not popular as it was slow, uppercase only, 72 > > characters x 20 lines, and not cursor addressable (much like Teletypes > > of that time). > > I am wrong, DEC VT05 was cursor addressable, it could even erase to end of line. > > 3.8 Direct Cursor Addressing (CAD) > > https://vt100.net/docs/vt05-rm/chapter3.html#S3.8 > > Through the use of CAD (0168), the cursor can be directed to any one > of the 1440 character locations on the CRT screen using three > instructions. The CAD function is used to allow updating of displayed > data without retransmitting the complete page. I wrote a VT05 emulator some while ago: https://github.com/aap/vt05 It's certainly not perfect and probably has some bugs, but I somehow had the urge to write it for no particular reason. I would actually be interested in the newline delay the machine needs because I didn't implement it. I hope this doesn't derail the discussion too much, but I would actually like to know which teletypes were used at bell labs. What strikes me as odd is that in UNIX lower case is the norm yet the ASR-33, which I would assume was ubiquitous, does only to upper case and also doesn't do some characters used by C, like {}. In this famous photo you see ASR-33s...so were they really the main interface to early UNIX? https://www.bell-labs.com/usr/dmr/www/kd14.jpg aap