Improving #MartyPC's video emulation with monitor emulation!

Instead of letting the CGA card's hsync and vsync outputs drive the display directly, we simulate a monitor that must lock on to these signals via vertical and horizontal PLLs.

This provides a semi-realistic 'bounce' when you change video-modes (needs a lil tweaking), but also means if you program an invalid video mode the screen will start to roll, like a real monitor.

#retrocomputing #emulation

Improving #MartyPC's video emulation with monitor emulation!

Instead of letting the CGA card's hsync and vsync outputs drive the display directly, we simulate a monitor that must lock on to these signals via vertical and horizontal PLLs.

This provides a semi-realistic 'bounce' when you change video-modes (needs a lil tweaking), but also means if you program an invalid video mode the screen will start to roll, like a real monitor.

#retrocomputing #emulation

Warm yourself by the virtual fireplace in this cosy 8-bit #Christmas scene. No MS-DOS or floppy 💾 drive required to stoke this very 1980s hearth. Thanks to software preservation, the flames are still crackling on the Internet Archive.

✉️ Open the full 1986 Sierra On-Line "A Computer Christmas" card ⤵️
https://archive.org/details/sierra-christmas-card-1986

#RetroComputing #VintageComputing #8bit #SoftwarePreservation #ComputerHistory

Don’t forget to play Dark Castle today to see the tree in the foyer 🎄

#RetroComputing #VintageApple #VintageMac #Typeframe

Don’t forget to play Dark Castle today to see the tree in the foyer 🎄

#RetroComputing #VintageApple #VintageMac #Typeframe

Warm yourself by the virtual fireplace in this cosy 8-bit #Christmas scene. No MS-DOS or floppy 💾 drive required to stoke this very 1980s hearth. Thanks to software preservation, the flames are still crackling on the Internet Archive.

✉️ Open the full 1986 Sierra On-Line "A Computer Christmas" card ⤵️
https://archive.org/details/sierra-christmas-card-1986

#RetroComputing #VintageComputing #8bit #SoftwarePreservation #ComputerHistory

Staying warm in front of the 1-bit glow of the Lisa and the Yule log with MacFLIM.

#RetroComputing #VintageApple #VintageMac #AppleLisaClone #AppleLisa

Staying warm in front of the 1-bit glow of the Lisa and the Yule log with MacFLIM.

#RetroComputing #VintageApple #VintageMac #AppleLisaClone #AppleLisa

7 days to find 7 new members to get us to 400 for 2025!

The PDP-8/e and PDP-12 are counting bits in the ACs for you.

https://icm.museum

#retrocomputing #vintagecomputing

7 days to find 7 new members to get us to 400 for 2025!

The PDP-8/e and PDP-12 are counting bits in the ACs for you.

https://icm.museum

#retrocomputing #vintagecomputing

Happy DEC 20 day! from https://icm.museum

2026 will be the year of 36bits

#retrocomputing #vintagecomputing #ai

@Recta_Pete @fozztexx Cool! TIL the Portfolio has sound!

#RetroComputing #AtariPortfolio #Atari

30 years ago... wouldn't it be nostalgic to play Commodore 64 games on your PC, asks this German article from PC Player 12/1995.

I love meta-retrocomputing.

#retrocomputing

I saw this on BlueSky.

I don't want to call anybody out, and it's not really important that one person did this as this is going to be a be a general problem going forward.

The increasing popularity of "editing" features in generative AIs is going to lead to a lot of people thinking it is harmless to use it to upscale or contrast-adjust historical media.

#retrocomputing

HEY, #Seattle folk (and or local #retrocomputing folk)

Want a 45U server rack?

It's FREE!

But you have to come get it from my workshop in Everett

Seriously this thing is taking up a big chunk of space and I want it *gone*

If nobody takes it by Jan 4th I'm just gonna push it out into the alley way and let nature take its course