Not Your Dad's Mainframe: Little Iron 4000
Anne & Lynn Wheeler
for a little ios3270 drift, an ios3270 version of the green card was done; here is a crude conversion from ios3270 to html
for some of the ios3270 description see
I had added the sense bytes section
wrote, in part: I am now wondering if someone *already did that*. But not on a drum or chain printer. Some adding machines and tab equipment used...
Real green cards didn't have sense byte section ... but the 360-67 "blue cards" do (I still have one) ... but didn't included 3380 or A220 information ... see the sense byte section.
I got involved with writing a drivers for HYPERChannel and A220 as channel extension circa 1980 for Santa Teresa lab. They were rapidly growing and bursting at the seems ... so 300 people from IMS were being moved to offsite, leased bldgs (bldgs 96 & 97). They were use to CMS local channel attach 3270s (tso and sna-vtam local and remote were found to be pretty intolerable). HYPERChannel-A220 provided for channel extension over T1 microwave link.
On my page at where I discuss the a small fragment of the history of the punched card, I also digress into noting IBM's 48-character, 60-character, and 120-character character...
there was T3 collins digital radio between bldg. 90-stl and bldg. 12 on the san jose plant site ... via a repeater tower on the hill above stl. the roof of bldg. 12 then had line-of-site to roof of bldg. 96 ... bldg. 12 then had line-of-site to roof of bldg. 96. A T1 sub-channel was created on the T3 link to bldg. 12 ... and then a T1 microwave tail-circuit installed between bldg. 12 and bldg. 97.
The 300 relocated IMS people then got nearly cms "local" 3270 performance from their remote location to STL.
Charlie Gibbs That sounds like how one model of the Dataproducts drum printer did it. A spinning drum with the entire character set for each of the columns. The small...
I then used HYPERChannel for computer-to-computer links in high-speed data transport project
Hi all! Everyone who ever used a computer prior to 1990 is familiar with the old "Super Star Trek" game and its various...
I also wrote the RFC1044 driver (in my standard RFC summary, clicking on the ".txt=nnn" field retrieves the actual RFC)
for the standard mainframe tcp-ip product.
because of various issues, the standard mainframe tcp-ip product would saturate a full 3090 processor peaking out at 44kbytes-sec. thruput. In some tuning tests we did at cray research between a cray machine and a 4341-clone, rfc1044 support was sustaining 1mbyte-sec thruput using only a modest amount of the 4341-clone.
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