MT RAM chips are known for their failure rates 🤬, especially the MT 4264, a 64K x 1 bit chip. They can fail completely, though TIL that often they fail partially and may still be usable as a 32K x 1 bit chip, like either the OKI MSM3732 or a TI TMS4532 🤔 github.com/tops4u/Ram-T... Not half bad.
GoofOffBert
GoofOffBert
@goofoffbert.bsky.social
A deep interest in the 8-bit and 16-bit computer age. That period of immense technological change for the business and home computer user. Commodore, Amiga, Apple II, Atari, early IBM and so many other systems that defined the computer revolution.
108 followers139 following654 posts
These chips were often used in the Sinclair ZX Spectrum 48K home computer. "The 32K RAM chips on the Spectrum are actually 64K RAM chips. " (the following link is without HTTPS): www.breakintoprogram.co.uk/hardware/com...
GoofOffBert reposted
GoofOffBert reposted
GoofOffBert reposted
I am back from 2 weeks of international travel and getting ready for Sunday Funday from The Amiga Saloon! Lots to catch up on. See you tomorrow October 25th - 2pm EDT/6pm GMT/8pm CEST #commodore #commodoreamiga #retrogamer #retrogaming #indiegame LINK: twitch.tv/amigabill
Testing the 24 pin One ROM in the IBM 5150. Allows me to have GlaBIOS, the original IBM Oct 27, 1982 BIOS, the XTROMtest ROM and the Supersoft/Landmark diagnostic ROM on one chip that I can switch to as needed. I really love this project, lots of plans where this will work within DOS. onerom.org
GoofOffBert reposted
GoofOffBert reposted
GoofOffBert reposted
@morefunmakingit.bsky.social Hi Lee, I have just commented your last video, telling you about a few things, that are good to have. Here are some pictures of those things: * ESD brushes * mouse toilets for SMD parts * different extruders
GoofOffBert reposted
If you missed it earlier… I’m giving away a FREE PDF copy of FREEZE64 issue 88… If you are not quite sure what FREEZE64 is all about, you may enjoy finding out by reading this *NEW* FREE PDF copy of issue 88: freeze64.com/2026/10/19/f... Please support 😊🙏❤️ #Commodore64 #C64
GoofOffBert reposted
GoofOffBert reposted
GoofOffBert reposted
GoofOffBert reposted
It's NES day, and also my 10th wedding anniversary. No I did not plan it that way. If you wanna get me a gift, all I want is for you to watch this if you haven't, it took me 15 years to make.
41 years ago today* the Nintendo Entertainment System was introduced, in a wild, risky, and completely unlikely way. If you haven't seen our documentary yet, put aside 45 minutes and see the NES as you never have before. *We can't substantiate this date, It's Complicated but probably correct(ish)
PSA 📢 : Don't put the resistor packs in backwards. 🤪
I got this XT-IDE kit so that I could eventually have a "hard drive" in the IBM 5150 that I'm restoring. The XT-IDE by Glitch Works is an open source project. I just love open source hardware!! Especially when it comes to keeping these old machines alive! www.glitchwrks.com/xt-ide
GoofOffBert reposted
Was the VICmodem the first modem to sell a million units? I dug into it. In this blog post, I estimate how many units actually sold and I share my methodology. And this one's personal, it was my first modem. dfarq.homeip.net/how-many-vic... #retrocomputing #vintagecomputing
GoofOffBert reposted
Tough day 🥴 .. my copper tape didn't work. The adhesive side is not very conductive. Ordered a different brand. Tomorrow, until the new copper tape arrives, I'm going to play the Tetris and Zelda that I bought for the NES at the @retrogamingexpo.bsky.social. Oh, gotta get the flu shot too.
GoofOffBert reposted
GoofOffBert reposted
Replying to @eliasdaler.bsky.social
I recommend NesHacker's videos on YouTube and this handy app for learning 6502 No messing around with VSCode setting up environments, Learn 6502 Assembly does it all in the app m.youtube.com/c/NesHacker jumplink.eu/Learn6502/en/
GoofOffBert reposted
On Ebay, tons of these "Cycle Logic" CGA video cards. All about $35-$45 .. but so many of them, I was wondering if it was some sort of scam/hoax. So I bought one .. and they work well! Retro 8086/8088 is popular in China, they made condensed versions of IBM's CGA card. 8086cpu.com/lm6/79.html
GoofOffBert reposted
An untested Socket 7 motherboard from the batch I was sent by @uhf-satcom.bsky.social 🙏🙏🙏 I'll be checking out tomorrow! Quite a cool board tbh, onboard video, onboard sound (C-Media CMI8330) (no connectors for either, so I'll try and make some). Jetway J-TX98B [1998]
GoofOffBert reposted
GoofOffBert reposted
dBASE was a software classic. On October 12, 1991, it changed hands. Borland purchased its publisher for $439 million. But Borland's dreams of controlling 70 percent of the database market proved short-lived. dfarq.homeip.net/what-happene... #retrocomputing #vintagecomputing
I'm surprised IBM didn't update their ROMs with a non-cassette version of BASIC. I mean, this machine does have two huge floppy drives. I do ❤️ that BASIC is a basic part of the machine. No keyboard yet, working on that, the Honeywell XT/AT keyboard has broken traces on the thin plastic sheet thing.
GoofOffBert reposted