🇺🇸 Osborne 1: Part 8 (Quick Look at ScreenPac & QuickPac) [TCE скачать в хорошем качестве

🇺🇸 Osborne 1: Part 8 (Quick Look at ScreenPac & QuickPac) [TCE

I finally got my hands on a ScreenPac, the display upgrade that allows 80 and 100 column text in addition to the standard 52 columns. As a bonus the Osborne 1 also came with an "Oscool Fan" and a QuickPac (by a company called Drive C) that adds a 384KB RAM disk ... two whole DD disks. The machine also included the Double Density disk upgrade as well, not something you can tell about an Ossy unless you can see a picture of its motherboard. The QuickPac manual also suggests it can be used as a cache for the Trantor hard disk, which I know nothing about. http://www.bitsavers.org/bits/Osborne... Looking at how the ScreenPac is installed, I might need to revise my dual-BIOS ROM daughterboard ... not sure if there's enough space ... there might be. Let's see. 00:00 ... Oscool Fan 02:00 ... QuickPac & ScreenPac 06:30 ... QuickPac removed 07:33 ... Look inside at the boards 11:40 ... Motherboard removed 14:20 ... ScreenPac close-up 17:30 ... ScreenPac daughterboard removed 18:50 ... QuickPac disassembly 23:00 ... Channel thanks & Outro -------------------------------- From Part 7: The Osborne Model 1 supported only Single Density (SD) disks initially ... ten 256 byte sectors per track, yielding 92KB of formatted capacity per disk. An upgrade daughterboard become available which allowed Double Density (DD) support ... five 1025 byte sectors, yielding 184KB formatted capacity per disk. The drives remained Single Sided (SS) with 40 tracks per disk. Unfortunately it's not really possible to tell from the outside whether a particular Model 1 has this board. Double Density support was added with BIOS ROM version 1.4 so if the machine has on older ROM version (i.e. photo shows the powered-on screen) then it likely doesn't support DD disks. But, there is no guarantee that a machine displaying version 1.4 or higher has the daughterboard, either. Nathaniel Roach's reproduction DD board: https://gitlab.com/NRoach44/occ1-dd-u... VCFED Forum post: https://forum.vcfed.org/index.php?thr... My Osborne 1 Github: https://github.com/0ddjob/Osborne_1 -------------------------------- Check out my Patreon for regular blog-type updates between videos - there is a free membership tier and two paid tiers (US$2 and US$5). There is also a one-week trial for the paid tiers so if you don't think it's worth it, then cancel ... no hard feelings ... I appreciate any support, even if it's just subscribing to my YouTube channel!   / thecluelessengineer   -------------------------------- Music by Karl Casey @ White Bat Audio https://karlcasey.bandcamp.com    / @whitebataudio