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TRS-80 Model 4 Hi-Res Graphics Upgrade

My TRS-80 Model 4 gets even better with high-resolution graphics! I install Ian Mavric's "Improved Grafyx 4.2(.1)" HRG board, which is his reproduction of the MicroLabs Grafyx board from the 1980s. After installation, I test some high-resolution software including Post Master, a Slot machine program, and some Graphics BASIC programs. I swear a little more than usual in this video... Links: Ian Mavric's Grafyx board site (includes software): http://members.iinet.net.au/~ianmav/h... Catalog images from RadioShack Catalogs: https://www.radioshackcatalogs.com/fl... Music/SFX (in order): D A T Recorder Fast Forward (Digital Juice) Corky Dodges Traffic by Richard Ames (Digital Juice) Video clip: Rain Main (Four-second Slot Machines clip at 16:10), [official MGM link not found], MGM/UA Communications Co., 1988 Chapters: Intro / Background (0:00) Machine Apart / VGA Connector / Gate-Array vs. Non-Gate-Array (1:53) Installing the Grafyx Card (4:14) Smoke Test / GBASIC with GTEST/BAS / Spare Parts? (5:19) Software - GBASIC - Missile (7:22) Software - Post Master (9:12) Software - Tournament Chess (13:40) Software - Slot Machine (15:17) Software - GBASIC - Tunnel (17:01) Bonus - Comprehensive HRGTEST/CMD (17:54) Outro (20:05) I do these videos unscripted, so I apologize if the in-the-moment descriptions of things are a bit scattered. If you have any questions/comments about this video, you can find me in any of these fine locations: The Tandy Discord Server The CoCo Nation Discord Server The TRS-80 Color Computer (CoCo) group on Facebook The CoCo Crew Podcast group on Facebook On the Vintage Computer Forums (vcfed.org) The TRS-80 Models I-4/4P Group on Facebook Tandy / Radio Shack Model II /12 / 16 / 16B / 6000 Owner's Group on Facebook Twitter (I'm TJBChris there...) The Level29 BBS (I'm TJBChris there, too.) Particles BBS (Guess who I am here? Yeah, TJBChris.) Thanks for watching!