The Last Psion | Alex
@thelastpsion.com
#Psion hardware/software hackery, especially SIBO/EPOC16.
Made #PsiDrive, a USB SIBO SSD reader. Slowly rewriting the SIBO C SDK in Pascal.
⚠️ WARNING: Will sidequest ⚠️
🦣 https://oldbytes.space/@thelastpsion
🏔️ https://codeberg.org/thelastpsion
Made #PsiDrive, a USB SIBO SSD reader. Slowly rewriting the SIBO C SDK in Pascal.
⚠️ WARNING: Will sidequest ⚠️
🦣 https://oldbytes.space/@thelastpsion
🏔️ https://codeberg.org/thelastpsion
Pinned
The Last Psion | Alex
@thelastpsion.com
· Nov 15
Maybe I should do an #introduction?
I'm Alex and I have a PDA problem.
For a quick summary, take a look at the alt text for these photos and the hashtags below. I also wrote a longer intro here: oldbytes.space/@thelastpsio...
#retrocomputing #Psion #RP20240 #Pascal #HaikuOS #PCB #MAME #16bit
I'm Alex and I have a PDA problem.
For a quick summary, take a look at the alt text for these photos and the hashtags below. I also wrote a longer intro here: oldbytes.space/@thelastpsio...
#retrocomputing #Psion #RP20240 #Pascal #HaikuOS #PCB #MAME #16bit
Reposted by The Last Psion | Alex
Aw man 😞 Rest in peace Mr Cheifet, host of Computer Chronicles: obits.goldsteinsfuneral.com/stewart-chei...
What a legend. His work in both presenting and preserving the early days of computer history has been (and will continue to be) deeply appreciated! My condolences to his family and friends.
What a legend. His work in both presenting and preserving the early days of computer history has been (and will continue to be) deeply appreciated! My condolences to his family and friends.
Stewart Cheifet Obituary December 28, 2025 - Goldsteins Funeral
View Stewart Cheifet's obituary, find service dates, and sign the guestbook.
obits.goldsteinsfuneral.com
December 31, 2025 at 9:35 PM
Aw man 😞 Rest in peace Mr Cheifet, host of Computer Chronicles: obits.goldsteinsfuneral.com/stewart-chei...
What a legend. His work in both presenting and preserving the early days of computer history has been (and will continue to be) deeply appreciated! My condolences to his family and friends.
What a legend. His work in both presenting and preserving the early days of computer history has been (and will continue to be) deeply appreciated! My condolences to his family and friends.
I guess that means I do the many jobs that @jesszafarris.bsky.social does? #WordsFromHell
Well, now I'm an English professor...
December 31, 2025 at 8:11 AM
I guess that means I do the many jobs that @jesszafarris.bsky.social does? #WordsFromHell
Reposted by The Last Psion | Alex
Christmas Retro Jigsaw 2025 - Completed it Mate! 👍
December 28, 2025 at 5:16 PM
Christmas Retro Jigsaw 2025 - Completed it Mate! 👍
Reposted by The Last Psion | Alex
I'm hoping to release my latest ultra-comprehensive gold-standard 6502 disassembly in the next few days.
It's been four months in the making and is almost complete.
Elite, Aviator, Revs, Lander… and now this.
Let the countdown begin: 🤖🪨🌲
#retrocomputing #retrogaming #bbcmicro #commodore64 #8bit
It's been four months in the making and is almost complete.
Elite, Aviator, Revs, Lander… and now this.
Let the countdown begin: 🤖🪨🌲
#retrocomputing #retrogaming #bbcmicro #commodore64 #8bit
December 29, 2025 at 7:08 PM
I'm hoping to release my latest ultra-comprehensive gold-standard 6502 disassembly in the next few days.
It's been four months in the making and is almost complete.
Elite, Aviator, Revs, Lander… and now this.
Let the countdown begin: 🤖🪨🌲
#retrocomputing #retrogaming #bbcmicro #commodore64 #8bit
It's been four months in the making and is almost complete.
Elite, Aviator, Revs, Lander… and now this.
Let the countdown begin: 🤖🪨🌲
#retrocomputing #retrogaming #bbcmicro #commodore64 #8bit
I've made progress on #ECOBJ, my next tool rewrite from the #Psion SIBO C SDK. I can now break down a Relocatable Object Module File (OMF) enough to see what the original ECOBJ.EXE does.
Want to see some questionable #Pascal? Here's the repo: codeberg.org/thelastpsion...
#SIBOSDK #retrocomputing
Want to see some questionable #Pascal? Here's the repo: codeberg.org/thelastpsion...
#SIBOSDK #retrocomputing
ecobj
This will become a tool to manipulate 16-bit OMF object files, moving the class descriptor data into the code segment. It will eventually be a drop-in replacement for the Psion SIBO C SDK's ECOBJ.EXE.
codeberg.org
December 30, 2025 at 10:40 AM
I've made progress on #ECOBJ, my next tool rewrite from the #Psion SIBO C SDK. I can now break down a Relocatable Object Module File (OMF) enough to see what the original ECOBJ.EXE does.
Want to see some questionable #Pascal? Here's the repo: codeberg.org/thelastpsion...
#SIBOSDK #retrocomputing
Want to see some questionable #Pascal? Here's the repo: codeberg.org/thelastpsion...
#SIBOSDK #retrocomputing
Reposted by The Last Psion | Alex
I just ordered a St. Stephen's Day pizza.
Deep pan, crisp and even.
Deep pan, crisp and even.
December 26, 2025 at 6:01 PM
I just ordered a St. Stephen's Day pizza.
Deep pan, crisp and even.
Deep pan, crisp and even.
Yesterday evening while OH's family played board games, I was reading about the structure of `FIXUPP` records in the Relocatable Object Module Format.
They're used to me by now.
#retrocomputing
They're used to me by now.
#retrocomputing
December 26, 2025 at 1:16 PM
Yesterday evening while OH's family played board games, I was reading about the structure of `FIXUPP` records in the Relocatable Object Module Format.
They're used to me by now.
#retrocomputing
They're used to me by now.
#retrocomputing
How about a little #Psion gaming for the holiday season! @cyningstan.bsky.social has written a brand new game for the original Series 3 entirely in OPL. I've got it running on my 3mx. The added EL backlight adds an ethereal feeling to the play.
Get your copy here: cyningstan.itch.io/dragonfell-p...
Get your copy here: cyningstan.itch.io/dragonfell-p...
December 25, 2025 at 10:18 AM
How about a little #Psion gaming for the holiday season! @cyningstan.bsky.social has written a brand new game for the original Series 3 entirely in OPL. I've got it running on my 3mx. The added EL backlight adds an ethereal feeling to the play.
Get your copy here: cyningstan.itch.io/dragonfell-p...
Get your copy here: cyningstan.itch.io/dragonfell-p...
Reposted by The Last Psion | Alex
As a little Christmas gift for #Psion fans, Dragonfell is released for the #PsionSeries3! This is a #HOMM inspired strategy war game, featuring ogres, dark elves, dragons and wizards. Finish off your enemy by conquering their citadel. Get it from cyningstan.itch.io/dragonfell-p...
December 24, 2025 at 10:34 AM
As a little Christmas gift for #Psion fans, Dragonfell is released for the #PsionSeries3! This is a #HOMM inspired strategy war game, featuring ogres, dark elves, dragons and wizards. Finish off your enemy by conquering their citadel. Get it from cyningstan.itch.io/dragonfell-p...
Reposted by The Last Psion | Alex
RAM is too expensive, going back to older hardware instead
December 24, 2025 at 11:26 PM
RAM is too expensive, going back to older hardware instead
Reposted by The Last Psion | Alex
Beta testing is going well on the Dragonfell project. I've changed up the title screen, with an image that can also be used for the manual cover, Itch banner and anywhere else that warrants full colour and high resolution. #gamedev #Psion #PsionSeries3
December 3, 2025 at 3:21 PM
Beta testing is going well on the Dragonfell project. I've changed up the title screen, with an image that can also be used for the manual cover, Itch banner and anywhere else that warrants full colour and high resolution. #gamedev #Psion #PsionSeries3
Reposted by The Last Psion | Alex
Calling all former BT engineers! Did you ever have one of these? It's actually a Psion Organiser II LZ64 but BT had a bunch made for them, rebadged as the P464, and with its own "Kilostream" software that only works via the Comms Link. Please reshare, as I'm keen to learn more about how it works!
December 5, 2025 at 8:47 AM
Calling all former BT engineers! Did you ever have one of these? It's actually a Psion Organiser II LZ64 but BT had a bunch made for them, rebadged as the P464, and with its own "Kilostream" software that only works via the Comms Link. Please reshare, as I'm keen to learn more about how it works!
Reposted by The Last Psion | Alex
The beautiful old Psion handheld computers remain a classic - retro, yet properly useful in daily life and work. I wouldn't be without mine, and my Discord buddy is writing *new games* for them. There's a hugely supportive community of us nutters - join us! psion.community
December 7, 2025 at 10:38 PM
The beautiful old Psion handheld computers remain a classic - retro, yet properly useful in daily life and work. I wouldn't be without mine, and my Discord buddy is writing *new games* for them. There's a hugely supportive community of us nutters - join us! psion.community
Reposted by The Last Psion | Alex
#Psion #OrganiserII OPL had no facility to write binary data files, so the game data had to be compatible with the Organiser II's database file format. The 240 limit for many elements is from this. damian.cyningstan.org.uk/downloads/21... #barbarians #gamedev
December 12, 2025 at 1:13 PM
#Psion #OrganiserII OPL had no facility to write binary data files, so the game data had to be compatible with the Organiser II's database file format. The 240 limit for many elements is from this. damian.cyningstan.org.uk/downloads/21... #barbarians #gamedev
Reposted by The Last Psion | Alex
AN EARLY CHRISTMAS GIFT HAS ARRIVED
my #retrocomputing holy grail
oh my god i actually have a psion 5mx now
oh my gooood
my #retrocomputing holy grail
oh my god i actually have a psion 5mx now
oh my gooood
December 15, 2025 at 11:39 AM
AN EARLY CHRISTMAS GIFT HAS ARRIVED
my #retrocomputing holy grail
oh my god i actually have a psion 5mx now
oh my gooood
my #retrocomputing holy grail
oh my god i actually have a psion 5mx now
oh my gooood
Reposted by The Last Psion | Alex
a dumb idea i had yesterday
December 18, 2025 at 10:46 PM
a dumb idea i had yesterday
Reposted by The Last Psion | Alex
Did you know that the Complete ZX Spectrum source code has been uploaded to Internet Archive by Timex. It was written by Nine Tiles on Zilog Development Studio and Timex obtained the same software.
A bit dry but there is a FART joke in there. See the last file.
archive.org/details/time...
A bit dry but there is a FART joke in there. See the last file.
archive.org/details/time...
December 8, 2025 at 9:17 PM
Did you know that the Complete ZX Spectrum source code has been uploaded to Internet Archive by Timex. It was written by Nine Tiles on Zilog Development Studio and Timex obtained the same software.
A bit dry but there is a FART joke in there. See the last file.
archive.org/details/time...
A bit dry but there is a FART joke in there. See the last file.
archive.org/details/time...
Reposted by The Last Psion | Alex
I propose a solution to our ongoing RAM shortage:
December 6, 2025 at 2:32 AM
I propose a solution to our ongoing RAM shortage:
Reposted by The Last Psion | Alex
I'm old.
If you're not, listen to this.
Get a guitar or some drums, or a trumpet. Pick up a brush, a pencil, some clay or a welder.
Just make shit. It doesn't have to be good (eventually it will be) just make music, art or write or whatever.
It's literally never been more important.
If you're not, listen to this.
Get a guitar or some drums, or a trumpet. Pick up a brush, a pencil, some clay or a welder.
Just make shit. It doesn't have to be good (eventually it will be) just make music, art or write or whatever.
It's literally never been more important.
November 27, 2025 at 4:21 AM
I'm old.
If you're not, listen to this.
Get a guitar or some drums, or a trumpet. Pick up a brush, a pencil, some clay or a welder.
Just make shit. It doesn't have to be good (eventually it will be) just make music, art or write or whatever.
It's literally never been more important.
If you're not, listen to this.
Get a guitar or some drums, or a trumpet. Pick up a brush, a pencil, some clay or a welder.
Just make shit. It doesn't have to be good (eventually it will be) just make music, art or write or whatever.
It's literally never been more important.
Reposted by The Last Psion | Alex
November 27, 2025 at 7:27 PM
Reposted by The Last Psion | Alex
Stocking stuffer ideas for your retro collector:
-Amtech flux
-Solder braid
-Sharp tweezers
-Flush cutter
-Machined dip sockets 8 up to 40pin
-Ceramic capacitor assortment up to 10uF
-Eye loupes
-Magic erasers
-kynar wire
-DeoxIT with needle dispenser
-Polypropylene safety cap assortment up to 1uf
-Amtech flux
-Solder braid
-Sharp tweezers
-Flush cutter
-Machined dip sockets 8 up to 40pin
-Ceramic capacitor assortment up to 10uF
-Eye loupes
-Magic erasers
-kynar wire
-DeoxIT with needle dispenser
-Polypropylene safety cap assortment up to 1uf
November 23, 2025 at 3:08 AM
Stocking stuffer ideas for your retro collector:
-Amtech flux
-Solder braid
-Sharp tweezers
-Flush cutter
-Machined dip sockets 8 up to 40pin
-Ceramic capacitor assortment up to 10uF
-Eye loupes
-Magic erasers
-kynar wire
-DeoxIT with needle dispenser
-Polypropylene safety cap assortment up to 1uf
-Amtech flux
-Solder braid
-Sharp tweezers
-Flush cutter
-Machined dip sockets 8 up to 40pin
-Ceramic capacitor assortment up to 10uF
-Eye loupes
-Magic erasers
-kynar wire
-DeoxIT with needle dispenser
-Polypropylene safety cap assortment up to 1uf
Reposted by The Last Psion | Alex
Do you think you can beat the high scores? And would you like to win a limited edition badge if you do? (*while stocks last). Then you want to come to Retro Computer Festival at @computinghistory.org.uk this weekend!
November 14, 2025 at 2:54 PM
Do you think you can beat the high scores? And would you like to win a limited edition badge if you do? (*while stocks last). Then you want to come to Retro Computer Festival at @computinghistory.org.uk this weekend!
Reposted by The Last Psion | Alex
Are you ready for #PicoIDE? It seems to be telling me it's ready. Coming soon: ATAPI optical disc emulation and IDE hard drive emulation. picoide.com
November 10, 2025 at 2:41 AM
Are you ready for #PicoIDE? It seems to be telling me it's ready. Coming soon: ATAPI optical disc emulation and IDE hard drive emulation. picoide.com
Reposted by The Last Psion | Alex
It's not just Polymatt's ideas that make him a genius, it's also his attitude. He demonstrates a methodology that is centred around the pursuit of knowledge and understanding. The result is that the 'unsaveable' was saved.
Incredible.
Incredible.
New video up! Just finished the massive project of restoring/rebuilding @lgr-yt.bsky.social’s destroyed Chaplet Halikan LA-30A. This was a big one 😅. Enjoy!
youtu.be/BilLgXkR_Kw
youtu.be/BilLgXkR_Kw
Restoration or Resurrection? Re-creating a rare 80's laptop from the ground up
YouTube video by polymatt
youtu.be
November 9, 2025 at 7:54 PM
It's not just Polymatt's ideas that make him a genius, it's also his attitude. He demonstrates a methodology that is centred around the pursuit of knowledge and understanding. The result is that the 'unsaveable' was saved.
Incredible.
Incredible.
Reposted by The Last Psion | Alex
Oh wow, this time next we'll be in full swing! Tickets for the Saturday are close to selling out - www.computinghistory.org.uk/det/74558/Re... - alternatively, Sunday will be quieter, but still the same wonderful exhibitors - www.computinghistory.org.uk/det/74909/re... - see you all next weekend!
November 8, 2025 at 11:57 AM
Oh wow, this time next we'll be in full swing! Tickets for the Saturday are close to selling out - www.computinghistory.org.uk/det/74558/Re... - alternatively, Sunday will be quieter, but still the same wonderful exhibitors - www.computinghistory.org.uk/det/74909/re... - see you all next weekend!