Nicolas Mailloux (Maillouski)
@nicolasmailloux.bsky.social
I am a retro-computer geek
VCF Montreal Showrunner
https://vcfed.org/vcf-montreal/
Maker of things
Car enthusiast
Airplane pilot
CEO of Micronick and PLM 2
Ham callsing VE2UTK
VCF Montreal Showrunner
https://vcfed.org/vcf-montreal/
Maker of things
Car enthusiast
Airplane pilot
CEO of Micronick and PLM 2
Ham callsing VE2UTK
Just went full @adriansdigitalbasement.com on it. Looks like the D8251A is the culprit. Can’t find one on any of my spare boards.
November 16, 2025 at 3:08 AM
Just went full @adriansdigitalbasement.com on it. Looks like the D8251A is the culprit. Can’t find one on any of my spare boards.
Current connections :
AMD 8251A TXD (pin19)
→ MC1488 2A/2B (pins4&5 tied)
→ MC1488 2Y (pin6)
→ DB9 pin2 (TX out)
AMD 8251A TXD (pin19)
→ MC1488 2A/2B (pins4&5 tied)
→ MC1488 2Y (pin6)
→ DB9 pin2 (TX out)
November 16, 2025 at 12:46 AM
Current connections :
AMD 8251A TXD (pin19)
→ MC1488 2A/2B (pins4&5 tied)
→ MC1488 2Y (pin6)
→ DB9 pin2 (TX out)
AMD 8251A TXD (pin19)
→ MC1488 2A/2B (pins4&5 tied)
→ MC1488 2Y (pin6)
→ DB9 pin2 (TX out)
RS-232 Chips on the Board:
MC1489 / DS1489 = Receiver
RS-232 → TTL
MC1488 / DS1488 = Driver
TTL → RS-232
MC1489 / DS1489 = Receiver
RS-232 → TTL
MC1488 / DS1488 = Driver
TTL → RS-232
November 16, 2025 at 12:31 AM
RS-232 Chips on the Board:
MC1489 / DS1489 = Receiver
RS-232 → TTL
MC1488 / DS1488 = Driver
TTL → RS-232
MC1489 / DS1489 = Receiver
RS-232 → TTL
MC1488 / DS1488 = Driver
TTL → RS-232
Pin 2 and 3 of the RS232 interface are going each in one of the chips there. Gotta go read the datasheet.
November 16, 2025 at 12:26 AM
Pin 2 and 3 of the RS232 interface are going each in one of the chips there. Gotta go read the datasheet.
1. Insert small tool in hole.
2. Carefully lift the crt cover just over the main casing. Slide it backwards so the brightness adjuster pin does not break.
3. Undo CRT connector (and be amazed by my 3D modeling skills of recreating the locking mechanism.
2. Carefully lift the crt cover just over the main casing. Slide it backwards so the brightness adjuster pin does not break.
3. Undo CRT connector (and be amazed by my 3D modeling skills of recreating the locking mechanism.
November 16, 2025 at 12:25 AM
1. Insert small tool in hole.
2. Carefully lift the crt cover just over the main casing. Slide it backwards so the brightness adjuster pin does not break.
3. Undo CRT connector (and be amazed by my 3D modeling skills of recreating the locking mechanism.
2. Carefully lift the crt cover just over the main casing. Slide it backwards so the brightness adjuster pin does not break.
3. Undo CRT connector (and be amazed by my 3D modeling skills of recreating the locking mechanism.
Is it as if the electron beam is intermittently firing at the beginning ?
November 15, 2025 at 11:45 PM
Is it as if the electron beam is intermittently firing at the beginning ?
Am I feeling a love affair ? 🤣
November 15, 2025 at 11:44 PM
Am I feeling a love affair ? 🤣
Reposted by Nicolas Mailloux (Maillouski)
Seeing lots of Canadian commenters on this episode wishing to attend but would prefer one in Canada: well the first VCF Montreal is a thing this January!
vcfed.org/vcf-montreal...
Exhibiting there will be free and they're actively looking for more exhibitors right now to attend. Check it out! 🇨🇦
vcfed.org/vcf-montreal...
Exhibiting there will be free and they're actively looking for more exhibitors right now to attend. Check it out! 🇨🇦
VCF Montreal Exhibitor FAQ – FAQ Exposants – Vintage Computer Federation
vcfed.org
October 26, 2025 at 2:55 PM
Seeing lots of Canadian commenters on this episode wishing to attend but would prefer one in Canada: well the first VCF Montreal is a thing this January!
vcfed.org/vcf-montreal...
Exhibiting there will be free and they're actively looking for more exhibitors right now to attend. Check it out! 🇨🇦
vcfed.org/vcf-montreal...
Exhibiting there will be free and they're actively looking for more exhibitors right now to attend. Check it out! 🇨🇦
Can’t touch this!!
October 24, 2025 at 1:03 AM
Can’t touch this!!
A little acid bath can do miracles :)
October 24, 2025 at 12:16 AM
A little acid bath can do miracles :)
I used to watch that movie over and over again!!
October 23, 2025 at 10:23 PM
I used to watch that movie over and over again!!
Hand raised! I stopped production which cost 30k/h by hot-uplugging SAS box from the hypervisor.
Twice….
Twice….
October 23, 2025 at 7:59 PM
Hand raised! I stopped production which cost 30k/h by hot-uplugging SAS box from the hypervisor.
Twice….
Twice….
I was a PO for almost 2 years. I know the pain ahaha.
October 15, 2025 at 12:25 PM
I was a PO for almost 2 years. I know the pain ahaha.
You can go 4800 bauds btw.
September 22, 2025 at 12:11 AM
You can go 4800 bauds btw.
Will we ever see windtraps ?
September 21, 2025 at 7:50 PM
Will we ever see windtraps ?
They were all made in France. So I doubt it.
September 20, 2025 at 10:23 PM
They were all made in France. So I doubt it.
I had fun digging into France’s classified ads to find you some spare parts!
September 19, 2025 at 9:41 PM
I had fun digging into France’s classified ads to find you some spare parts!
Looks like you plugged a VGA cable in your Soundblaster lol
September 16, 2025 at 11:54 PM
Looks like you plugged a VGA cable in your Soundblaster lol
Best band ever! Thanks for the show @vkc.sh, @actionretro.bsky.social
@tayloramyshow.bsky.social
Awesome people right there! Hope to see you for #VCFMONTREAL !
@tayloramyshow.bsky.social
Awesome people right there! Hope to see you for #VCFMONTREAL !
September 15, 2025 at 7:31 PM
Best band ever! Thanks for the show @vkc.sh, @actionretro.bsky.social
@tayloramyshow.bsky.social
Awesome people right there! Hope to see you for #VCFMONTREAL !
@tayloramyshow.bsky.social
Awesome people right there! Hope to see you for #VCFMONTREAL !