Mastodawn

AlanGrassia May 28

I made a tiny bit of progress with working on my #IBM5150 today.

I was able to read an a 2764 IC today with my T48 EPROM programmer.

Now, to erase a couple of ICs so I can reprogram them with Rudd's diagnostic ROM.

#VintageComputing #RetroComputing

unattributed 𓂃✍︎May 26

The GOAT of IBM #keyboards - the #ModelF -- actually used one of these on an original #ibm5150 PC.

https://mastodon.social/@keyboards/116641235436544910

AlanGrassia May 22

Ok, dumb noob question about creating a Ruud's diagnostic ROM for my IBM 5150 64k-256k board. This is the first time I'm using any of this stuff.

I have 4 MCM68766 EPROMs from eBay, T48 programmer, & Xgpro v13.16 on a Windows 11 Pro PC.

I load the IC into the T48 in the correct orientation. In Xgpro, I load ruuds_diagnostic_rom_v5.5_8kb.bin. Then click PROG & I get "Pin in incorrect postion!" error.

What the heck am I doing wrong?!

#IBM5150 #RetroComputing #VintageComputing

AlanGrassia May 9

After coming back from #VCFEast2026 I felt a little bad about neglecting my #IBM5150 restoration project. So I spent some time buying some replacement chips. Hopefully I’ll be able to a diagnostic ROM running to help locate the bad RAM in bank 0.

#VintageComputing #RetroComputing #IBM

Hackaday [Unofficial]Apr 5

Cleaning an IBM 5150, And The Perfect Period PCB Soldermask

https://fed.brid.gy/r/https://hackaday.com/2026/04/05/cleaning-an-ibm-5150-and-the-perfect-period-pcb-soldermask/

Cleaning An IBM 5150, And The Perfect Period PCB Soldermask

Now that early PCs have moved firmly from the realm of e-waste into being collector’s items, it’s worth putting in some effort to restore them if you find one. [Epictronics] has an earl…

Hackaday

13 Apr 5

Cleaning an IBM 5150, And The Perfect Period PCB Soldermask https://hackaday.com/2026/04/05/cleaning-an-ibm-5150-and-the-perfect-period-pcb-soldermask/
#Retrocomputing #IBM5150 #Soldermask

Cleaning An IBM 5150, And The Perfect Period PCB Soldermask

Now that early PCs have moved firmly from the realm of e-waste into being collector’s items, it’s worth putting in some effort to restore them if you find one. [Epictronics] has an earl…

Hackaday

N-gated Hacker News Jan 21

💻🤔 Oh, the 12-minute saga of PC compatibility! Apparently, if your device can't time travel back to 1981 and run IBM 5150 software, you're doing it wrong. Who knew the secret to modern tech was being able to impress a computer museum? 🙄🔧
https://codon.org.uk/~mjg59/blog/p/what-is-a-pc-compatible/ #PCcompatibility #TechSaga #RetroComputing #IBM5150 #ComputerMuseum #HackerNews #ngated

What is a PC compatible?

Wikipedia says “An IBM PC compatible is any personal computer that is hardware- and software-compatible with the IBM Personal Computer (IBM PC) and its subsequent models”. But what does this actually mean? The obvious literal interpretation is for a device to be PC compatible, all software originally written for the IBM 5150 must run on it. Is this a reasonable definition? Is it one that any modern hardware can meet?

Matthew Garrett's Blog

AlanGrassia Jan 1

For the final day of #DOScember 2025 I give you part 4 of my #IBM5150 restoration video series. With lots of help from the community, I try to trace down what IC(s) are keeping my IBM 5150 from booting.

The IBM 5150 will return in 2026 for Part 5!

Happy Jank-tastic New Year!

https://youtu.be/p_PW85AOUFg

#RetroComputing #VintageeComputing #IBMPC