Yup, that's how I remember it as well. It had a single coax cable running to it, but you couldn't use the next 3 coax ports in the 3x74 controller. I remember the noise it made when it refreshed the screen as well. It seemed to me back at that time that there was an audible click for every character being repainted.
Rex -----Original Message----- From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Wendell Lovewell Sent: Monday, April 19, 2021 9:07 AM To: [email protected] Subject: [External] Re: Is there a vertical split in ISPF? You configured the 3174 controller to use 4 of it's ports to support 4 different LUs on the same coax, and it had to be in DFT mode. Then I think the 4 LU's were configurable to whatever screen size you wanted, but you might have had to give up some of the 3290's memory to get the 160 by ? screen size. My ears were younger back then & I could rest my eyes and listen for the high-pitched sound that meant the screen was being refreshed again (back in the days of "seconds" response time). My older boss didn't really believe me the time he caught me at it! ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN The information contained in this message is confidential, protected from disclosure and may be legally privileged. If the reader of this message is not the intended recipient or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any disclosure, distribution, copying, or any action taken or action omitted in reliance on it, is strictly prohibited and may be unlawful. If you have received this communication in error, please notify us immediately by replying to this message and destroy the material in its entirety, whether in electronic or hard copy format. Thank you. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
