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10 Comments
sgt
Very cool
flkenosad
We need to bring back spiral cables.
successful23
Super cool project. The block mode on the 3151 was way ahead of its time — kind of wild how it handled forms locally like that. Love the idea of hooking it up to a mainframe via your translator. Also yeah… we really need to bring back spiral cables.
Aloha
This is very cool!
As someone who wishes more people got some programming exposure to IBM z and how it works differently than minicomputer derived operating systems (both *nix and Windows count here), I think this is awesome.
electroly
At an old job we had a 3151 connected to an RS/6000 with AIX among other Wyse serial terminals. I suspect it came with the RS/6000 and they bought all the cheaper Wyse terminals later. Purely character mode in this configuration. I had no idea it supported any kind of block mode. Fascinating!
pelagicAustral
I'm freaking out… At 50:28 he says "…everything is green…" when referring to the monochrome terminal of the 3151, I'm seeing Cyan… is this the end?
reaperducer
Block mode was sort of the text terminal version of today's web SPA's.
I worked with one at a chemical company back in the 90's, and they were wonderfully efficient. Only send a single chunk of data when needed, not a constant stream of individual keypresses that have to be interpreted and processed.
leoc
Here's another, recently-started YT channel focussed on mainframes: ErnieTech's Little Mainframes https://www.youtube.com/channel/UCdi4FOLU9-kSiiE7tVuVyjg .
zabzonk
We connected our two IBM 4381s (VM/CMS) to our BT mega/kilostream serial network using VT200 (and VT00 & VT52)-emulating terminals via an IBM 7171 protocol converter. I had the somewhat unenviable task of programming this beast, but it worked well enough, and (like all IBM gear) was very well documented. This would be mid-1980s. The 7171 was good because it meant we didn't have to replace all our terminals.
msla
Huh. It actually is ASCII and not EBCDIC. I didn't know ASCII block mode terminals existed:
https://terminals-wiki.org/wiki/index.php/IBM_3151
https://www.ardent-tool.com/3151/