TRS-80 Model 4 Hi-Res Graphics Upgrade

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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:

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
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!
  1. TJBChris
  2. Tandy
  3. Radio Shack
  4. MicroLabs
  5. uLabs
  6. hi-res
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Комментарии
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That is a very nice Model 4! Love the Hi-Res graphics upgrade!

ohioterran
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The Model 4 is my absolutely fave computer ever... i remember seeing it in my local Tandy shop when it came out and it looked like it had fallen off a passing spaceship.

edgeeffect
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Awesome. I spent more time on my TRS-80 Model I in my childhood than I did just about anything else. What fond memories. 🙂

FlatEarthMath
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Was more interested in the funky drive 0, but figure out it was a small HD. Saw a Model-3 with a high resolution graphics board installed. I think it did a test pattern with a Native American. Love the "ludicrous speed" and "going plaid" comments to that Mel Brooks Parody of Star Wars.

LarryRobinsonintothefog
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Looks like an upgrade that Tandy should have made themselves.

cathrynm
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I legitimately have owned models 1 through 4. The 8 inch floppies were Dynamite at the time. LOL

TTM
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This looks more advanced than the Apple Macintosh, yet is 7 years earlier ...

francishuddy
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Hey Chris, I for one would care to see how you created the custom logo. Great video and thanks for sharing!

timwoodland
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So you have to have a Gate Array PCB for the HiRes board to work? Well, shucks. I haven't started to restore my GateArray model 4. I am do a VERY early 1982, LOW SN, non-gatearray MB. I ordered the hires card and games from Australia.

Also, question, where did you get the FreHD mounting plate? Yours has a display? The one I paid $210 for from Australia does not.

Daveyk
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I modified the LDOS 5.3.1 Logo to my own custom back in the day on my M3

moondoggie
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You don't have the game "global thermonuclear war"??

bennetfox
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Im just starting out in the TRS-80 world with a Model 4. it is a non gate array version. How do you get the FreHD, network share, etc. onto the machine? I cant really find any information on it and its kinda all over the place.

yskknud
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I just got a model 4 no. Gate array. So the model 4 has no graphics modes, not even the block graphics? TRSDOS 6 basics SET command doesn't work

offensivejerk
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Another Retro movie, where they use SD card.

yskknud
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Another Retro movie, where they use SD card.😒😒

ArneRagnarsson
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Im just starting out in the TRS-80 world with a Model 4. it is a non gate array version. How do you get the FreHD, network share, etc. onto the machine? I cant really find any information on it and its kinda all over the place.

THEtechknight
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