IBM Mainframe Episode 6 - fixing a dead OCA, making backups the hard way and OS/2 networking. скачать в хорошем качестве

IBM Mainframe Episode 6 - fixing a dead OCA, making backups the hard way and OS/2 networking.

Welcome to a new episode where we continue with the IBM Mainframe restoration. In this episode, we try to fix the PSU that blew up in the last one, and we'll add a new BIOS battery to silence the complaints on boot. With that done, we'll circle back to backing up the software on the disks, configure networking in OS/2 and we'll try out some quality of life improvements. Enjoy! Timeline 00:00:00 Intro 00:00:20 Recap from last episode 00:00:32 What is a varistor? 00:00:55 Filter caps 00:01:14 Desoldering components... 00:01:49 New caps go in 00:03:49 Inspection 00:05:16 Now I use an isolation transformer - worst case its fuse blows 00:05:52 Power LED is on... and no explosion! 00:06:10 Moment of truth... 00:06:34 Oh crap - OCA fault! 00:07:14 Do you remember these little cards? 00:07:35 There are subtle differences between the cards... 00:07:41 The componets that are installed here identify the card type. 00:08:22 Back together and re-installed 00:08:36 Flicked the switch... 00:09:37 Let’s now address the BIOS battery 00:12:18 Board is re-installed, let’s test... 00:12:31 Applying the settings as per IBMs service manual 00:13:29 Finally, we can come back to the backup :-) 00:14:05 the “tape” command is for controlling the drive 00:14:41 Using the “tar” command (Tape ARchiver) to backup the C: drive 00:16:22 22GB VMESA folder on E: 00:16:32 Will it run DOOM? Let’s find out. 00:16:40 Network config for DHCP 00:17:20 I found FTP-It on hobbes as well, a GUI ftp client 00:18:29 I unzipped the downloaded dmos219s.zip file to “Games” 00:20:26 Yes - it runs DOOM, and not too badly 00:21:22 Summary and outro. #retrocomputing #IBM #mainframe #S390 #restoration #integratedserver