Mogens B
@mogensb.bsky.social
Zilog Z80 forever! Also other retro computer related stuff; PiDP-8/11, 6502, and a little Arduino and Raspberry Pi.
Fan of old HP RPN calculators.
Software guy trying to figure out hardware!
Fan of old HP RPN calculators.
Software guy trying to figure out hardware!
May 30, 2025 at 10:37 AM
Successful upgrade of my SC126 to RomWBW 3.5.1 😃 next one on the bench is the SC140.
#8bit #RetroComputing #z80 #z180 #cpm
#8bit #RetroComputing #z80 #z180 #cpm
May 30, 2025 at 9:50 AM
Successful upgrade of my SC126 to RomWBW 3.5.1 😃 next one on the bench is the SC140.
#8bit #RetroComputing #z80 #z180 #cpm
#8bit #RetroComputing #z80 #z180 #cpm
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
What an upgrade from the datasette 📼
#8bit #RetroComputing #c64
May 24, 2025 at 9:56 AM
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
What an upgrade from the datasette 📼
#8bit #RetroComputing #c64
Slightly more retro than usual 😀 but fun! And kudos to those 17th and 18th century engineers for figuring this out …
May 6, 2025 at 5:43 AM
Slightly more retro than usual 😀 but fun! And kudos to those 17th and 18th century engineers for figuring this out …
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...
February 27, 2025 at 8:05 PM
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...
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
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
February 25, 2025 at 9:43 PM
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
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
My latest wall decoration 😃
January 27, 2025 at 9:36 PM
My latest wall decoration 😃
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
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
January 18, 2025 at 3:23 PM
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
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
"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
#RetroComputing #Apollo #AGC
December 23, 2024 at 1:54 PM
"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
#RetroComputing #Apollo #AGC
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
alias era='rm'
#RetroComputing #cpm #z80
December 23, 2024 at 9:23 AM
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
alias era='rm'
#RetroComputing #cpm #z80
XMAS light time!
NAND gate lights up when one or both inputs are low. No light when both inputs are high.
#RetroComputing #digital #logic
NAND gate lights up when one or both inputs are low. No light when both inputs are high.
#RetroComputing #digital #logic
December 21, 2024 at 4:14 PM
XMAS light time!
NAND gate lights up when one or both inputs are low. No light when both inputs are high.
#RetroComputing #digital #logic
NAND gate lights up when one or both inputs are low. No light when both inputs are high.
#RetroComputing #digital #logic
Test run of Spectrum Forth on The Spectrum, seems to run as expected 😀
#RetroComputing #thespectrum #forth #zxspectrum
#RetroComputing #thespectrum #forth #zxspectrum
December 19, 2024 at 10:41 PM
Test run of Spectrum Forth on The Spectrum, seems to run as expected 😀
#RetroComputing #thespectrum #forth #zxspectrum
#RetroComputing #thespectrum #forth #zxspectrum
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 😃
December 13, 2024 at 9:44 PM
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 😃
Amazon delivered some interesting reads for me, at quite different levels of abstraction 😀
#RetroComputing #z80 #thespectrum #zxspectrum
#RetroComputing #z80 #thespectrum #zxspectrum
December 13, 2024 at 7:10 PM
Amazon delivered some interesting reads for me, at quite different levels of abstraction 😀
#RetroComputing #z80 #thespectrum #zxspectrum
#RetroComputing #z80 #thespectrum #zxspectrum
My favourite CP/M 2.2 system. Why? Simplicity.
SC114 + SC139 + SC145
#8bit #RetroComputing #zilog #z80 #cpm
SC114 + SC139 + SC145
#8bit #RetroComputing #zilog #z80 #cpm
December 13, 2024 at 5:06 PM
My favourite CP/M 2.2 system. Why? Simplicity.
SC114 + SC139 + SC145
#8bit #RetroComputing #zilog #z80 #cpm
SC114 + SC139 + SC145
#8bit #RetroComputing #zilog #z80 #cpm
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
#RetroComputing #hp #vintagecalculators
December 11, 2024 at 7:45 PM
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
#RetroComputing #hp #vintagecalculators
December 4, 2024 at 7:40 PM
Latest firmware update 1.0.2 installed in The Spectrum. It was a very easy task 😀
#RetroComputing #thespectrum #zxspectrum #z80
#RetroComputing #thespectrum #zxspectrum #z80
November 29, 2024 at 11:24 PM
Latest firmware update 1.0.2 installed in The Spectrum. It was a very easy task 😀
#RetroComputing #thespectrum #zxspectrum #z80
#RetroComputing #thespectrum #zxspectrum #z80
Memotech MTX
upload.wikimedia.org/wikipedia/co...
upload.wikimedia.org/wikipedia/co...
November 28, 2024 at 9:40 PM
Memotech MTX
upload.wikimedia.org/wikipedia/co...
upload.wikimedia.org/wikipedia/co...
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
#RetroComputing #thespectrum #zxspectrum
November 26, 2024 at 10:20 PM
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
#RetroComputing #thespectrum #zxspectrum
The 50g is no better than the 32Sii 😄
November 25, 2024 at 9:58 PM
The 50g is no better than the 32Sii 😄
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
I actually used a 12" B/W TV with my 16k ZX Spectrum back in the days
#RetroComputing #thespectrum
November 25, 2024 at 8:26 PM
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
I actually used a 12" B/W TV with my 16k ZX Spectrum back in the days
#RetroComputing #thespectrum
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.
November 24, 2024 at 2:39 PM
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.
Even the weight of The Spectrum is close to the original. 510 gram versus roughly 570 for the Sinclair ZX Spectrum.
#RetroComputing
#RetroComputing
November 23, 2024 at 11:03 AM
Even the weight of The Spectrum is close to the original. 510 gram versus roughly 570 for the Sinclair ZX Spectrum.
#RetroComputing
#RetroComputing