iiinova — where your digital self keeps evolving

Mogens B @mogensb.bsky.social · 09/12/2025

Is it possible that GRX is an index used for referencing values lower in the stack, I.e., making possible to say swap [TOS] with [TOS-GRX] ?

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Mogens B @mogensb.bsky.social · 30/05/2025

Successful upgrade of my SC140 to RomWBW 3.5.1 😃 #8bit #RetroComputing #z80 #z180 #cpm

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Mogens B @mogensb.bsky.social · 30/05/2025

Successful upgrade of my SC126 to RomWBW 3.5.1 😃 next one on the bench is the SC140. #8bit #RetroComputing #z80 #z180 #cpm

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Mogens B @mogensb.bsky.social · 24/05/2025

My Commodore 64C just got a lot more fun to use 😃 by adding the brilliant Pi1541 Zero cartridge! What an upgrade from the datasette 📼 #8bit #RetroComputing #c64

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Mogens B @mogensb.bsky.social · 06/05/2025

Slightly more retro than usual 😀 but fun! And kudos to those 17th and 18th century engineers for figuring this out …

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Reposted by Mogens B

Ken Shirriff @righto.com · 01/05/2025

Intel's 386 processor (1985) moved the x86 architecture to 32 bits, but it needed to be backward compatible with earlier 16 and 8-bit processors. As a result, it needed complicated circuitry for its internal registers: six different circuits for 30 registers. Let's look at the silicon circuits. 1/N

A die photo of the Intel 386 processor under the microscope. The die has complex patterns that make up the different parts of the chip. The various blocks are roughly rectangular with different textures.
The main functional blocks are labeled, including the paging unit, bus interface unit, prefetch unit, segment unit, instruction decode unit, protection test unit, data unit, and control unit. The register file, the subject of this thread, is in the lower left corner, highlighted by a red rectangle. This die photo image has a purple tint.

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Mogens B @mogensb.bsky.social · 08/03/2025

...but will it play Spacewar 😁 I am pretty sure it will; looking really good!!

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Mogens B @mogensb.bsky.social · 27/02/2025

I have 3 left in the drawer just to make sure my uv eraser still has a purpose 😄

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Mogens B @mogensb.bsky.social · 27/02/2025

Nice! I only have this one, but I like it a lot! It’s the Micro UK101, a Grant Searle design, PCB by Steve Gray: cbmsteve.ca/microuk101/i...

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Mogens B @mogensb.bsky.social · 25/02/2025

My C64 just got the best digital video output I could ever dream of. The VIC-II-Dizer and an RGB2HDMI bought from c0pperdragon. This is definitely a 5-star rated solution. Excellent. (unfortunately the photo of the screen doesn't really capture how good the picture is) #c64 #8bit #retrocomputing

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Mogens B @mogensb.bsky.social · 25/02/2025

This is so much better than PDF files 😃 got this original handbook today! The book is from 1980 but in good condition. #hp41cv

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Mogens B @mogensb.bsky.social · 01/02/2025

Despite this decline, the word is very much alive in companies using IBM Z machines. We usually talk about the mainframe, and the decentralised platform for everything else 😀

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Mogens B @mogensb.bsky.social · 28/01/2025

I fully agree, and disruptions like this does not only impact economy, but also security. The cheaper the AI, the higher is the risk of malicious use.

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Mogens B @mogensb.bsky.social · 27/01/2025

Or any other AI not totally transparent about what happens to my queries...

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Mogens B @mogensb.bsky.social · 27/01/2025

... would I like to upload my information to a Chinese app ... 🤔🕵️‍♂️

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Mogens B @mogensb.bsky.social · 27/01/2025

My latest wall decoration 😃

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Mogens B @mogensb.bsky.social · 21/01/2025

Amazingly simple... Sort of 🤯

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Mogens B @mogensb.bsky.social · 19/01/2025

As always, you are posting amazingly detailed information of high value, thank you! My knowledge about digital logic keeps growing from reading your articles.

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Mogens B @mogensb.bsky.social · 18/01/2025

I am happy that I managed to revive this HP-41CV which I picked up very cheap because of heavy leakage from the batteries. Thorough cleaning and a new battery/port bay and screw mounts made the difference! Have to mention this HP-41CV is 41 years old 😃 #RetroComputing #vintagecalculators #hp #hp41c

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Mogens B @mogensb.bsky.social · 12/01/2025

Sorry for your loss 🥺 he looks like a very cute cat. A very hard, but good decision by you.

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Mogens B @mogensb.bsky.social · 30/12/2024

I notice there is an evaluation license, gotta try it out one of these days!

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Mogens B @mogensb.bsky.social · 29/12/2024

Do you like using the Oshonsoft tools? I have seen it before, but never really tried using it...

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Mogens B @mogensb.bsky.social · 23/12/2024

"Fly me to the moon" - the Apollo Guidance Computer was basically build on this resistor-transistor NOR gate, each IC containing 3 or 6 transistors, forming either a single 3-input NOR chip, or a double 3-input NOR chip. #RetroComputing #Apollo #AGC

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Mogens B @mogensb.bsky.social · 23/12/2024

I really needed this one in my Linux bash. Maybe I do a little too much CP/M stuff 😀 alias era='rm' #RetroComputing #cpm #z80

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Mogens B @mogensb.bsky.social · 21/12/2024

XMAS light time! NAND gate lights up when one or both inputs are low. No light when both inputs are high. #RetroComputing #digital #logic

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Mogens B @mogensb.bsky.social · 19/12/2024

Test run of Spectrum Forth on The Spectrum, seems to run as expected 😀 #RetroComputing #thespectrum #forth #zxspectrum

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Mogens B @mogensb.bsky.social · 17/12/2024

16 K ZX Spectrum it was...

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Mogens B @mogensb.bsky.social · 15/12/2024

I did the following: Request a download copy of your entire profile, to archive the history. And then use the app "Redact Privacy" to delete everything, it worked like a charm 😃

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Mogens B @mogensb.bsky.social · 14/12/2024

ZX81, shortly after replaced by a 16K ZX Spectrum

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Mogens B @mogensb.bsky.social · 14/12/2024

Changed??!? Except for a missing Internet connection, I think the scene is pretty much the same today for young gamers 😂

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Mogens B @mogensb.bsky.social · 13/12/2024

Most likely, it’s ok, but since this isn’t the cheapest disks I think I would also return it

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Mogens B @mogensb.bsky.social · 13/12/2024

With careful use I can get 3 digit precision from my Diwa Rietz 601, but so much slower than the HP-11C - I think the business case for handheld electronic calculators is clear, but I love my slide rules 😃

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Mogens B @mogensb.bsky.social · 13/12/2024

Ok you got my attention 😄 what's going on here??

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Mogens B @mogensb.bsky.social · 13/12/2024

Amazon delivered some interesting reads for me, at quite different levels of abstraction 😀 #RetroComputing #z80 #thespectrum #zxspectrum

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Mogens B @mogensb.bsky.social · 13/12/2024

My favourite CP/M 2.2 system. Why? Simplicity. SC114 + SC139 + SC145 #8bit #RetroComputing #zilog #z80 #cpm

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Mogens B @mogensb.bsky.social · 11/12/2024

Got this 1982 HP-10C today in very good condition 😃 I didn't have one in my "Voyager" collection so happy to find such a good one 💎 #RetroComputing #hp #vintagecalculators

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Mogens B @mogensb.bsky.social · 06/12/2024

Yeah Forth is great. I have spent some time using dxforth in CP/M, excellent!

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Mogens B @mogensb.bsky.social · 04/12/2024

That's a clear +1 follower 😀

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Mogens B @mogensb.bsky.social · 04/12/2024

I see this as a clear sign - the cat deserves a personal profile here, like on that other social media we don't talk about here 😸😸😸

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Mogens B @mogensb.bsky.social · 04/12/2024

I love being a "full-stack developer" in retrocomputing 😂 #RetroComputing #basic

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Mogens B @mogensb.bsky.social · 29/11/2024

Latest firmware update 1.0.2 installed in The Spectrum. It was a very easy task 😀 #RetroComputing #thespectrum #zxspectrum #z80

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Mogens B @mogensb.bsky.social · 28/11/2024

Memotech MTX upload.wikimedia.org/wikipedia/co...

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Mogens B @mogensb.bsky.social · 27/11/2024

Didn't have an assembler on the ZX81 so I did the mnemonics to hex code by hand. A little tedious 😄 but I learned a lot about the instruction set architecture of the Z80 this way

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Mogens B @mogensb.bsky.social · 26/11/2024

Check page 48(!) of the manual for further information 😃

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Mogens B @mogensb.bsky.social · 26/11/2024

The Spectrum is loaded with some real ROM images 😃 I am happy to find out this is a feature! I am getting more and more impressed by this machine. #RetroComputing #thespectrum #zxspectrum

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Reposted by Mogens B

Ken Shirriff @righto.com · 25/11/2024

I recently saw an amazing Navajo rug at the National Gallery of Art. It looks abstract at first, but it is a detailed representation of the Intel Pentium processor. Called "Replica of a Chip", it was created in 1994 by Marilou Schultz, a Navajo/Diné weaver and math teacher. 1/n

A Navajo rug with a complex pattern with muted reds, pinks and blues. The pattern consists of various vertical and horizontal rectangles with stripes. Around the border are small alternating black and colored rectangles. The weaving is mounted in a wooden frame and hanging on the museum wall.

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Mogens B @mogensb.bsky.social · 25/11/2024

The 50g is no better than the 32Sii 😄

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Mogens B @mogensb.bsky.social · 25/11/2024

Just loaded Zeus assembler on my new speccy. Looks good, hdmi is slightly better than rf modulation 😂 I actually used a 12" B/W TV with my 16k ZX Spectrum back in the days #RetroComputing #thespectrum

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Mogens B @mogensb.bsky.social · 24/11/2024

ALL content deleted from my X account 😃 leaving the profile dormamt for a while, with a reference to bluesky in the bio, before I deactivate the account completely.

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Mogens B @mogensb.bsky.social · 23/11/2024

Even the weight of The Spectrum is close to the original. 510 gram versus roughly 570 for the Sinclair ZX Spectrum. #RetroComputing

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