@twvd

315 Followers
49 Following
154 Posts
I build Snow, a 68k Macintosh emulator
Websitehttps://snowemu.com
GitHubhttps://github.com/twvd
Ko-fihttps://ko-fi.com/twvd
I made a Tinker Different thread explaining how to hook up a MIDI device on your host computer and have it communicate with Snow emulator. Both #MIDI in and MIDI out works
#Macintosh #retrocomputing
https://tinkerdifferent.com/threads/how-to-use-serial-midi-both-ways-from-snow-emulator.5392/
WIP: A Markdown editor for System 6. Multi-doc support, basic formatting, todo lists, modern keyboard shortcus. #vintagecomputing

I'm incredibly pleased to announce that the microcode for the Intel 80386 has been decoded.

It was a group effort by a bunch of talented people to extract and correct the physical bits, but the major work of decoding them was done by reenigne - you may know him from such incredible PC demos as 8088 MPH and Area 5150, as well as being the person who decoded the 8088 microcode previously.

Please, check out his writeup.

https://www.reenigne.org/blog/80386-microcode-disassembled/

#retrocomputing #vintagecomputing #microcode #reverseengineering

80386 microcode disassembled ยซ Reenigne blog

Two new features landed in Snow bleeding edge today:

- Floppy image writeback support. Snow will ask you before enabling this and you can change your mind, enable backups and some other things in the Options menu. Images can be automatically converted to MOOF if needed.
- Mount actual CDs in physical CD-ROM drives into your emulated Mac! This is (currently) Windows only, but nonetheless, very cool. Thanks to contributer beholdnec!

Wrote up a little blog post on the GlyphBlaster. Nothing you haven't seen if you've been following me, but just putting it out there.

https://martypc.blogspot.com/2026/05/60fps-video-on-cga-glyphblaster.html

#retrocomputing #glyphblaster

60fps Video on a CGA? - The GlyphBlaster

GlyphBlaster The GlyphBlaster in action - is that a cat in text mode??  There's a certain genre of retro-hardware hack that everyone recogni...

really happy to have discovered something hiding in plain sight for several years: robyn & rand miller's original Myst pitch document from 1991.

it's a succinct work of art in itself. i'm surprised at how much of the world design was already on paper.

as all of the copies found elsewhere online are heavily compressed webp/jpeg, i've uploaded the robyn's original PNGs to IA here:

https://archive.org/details/myst_proposal

originally from robyn's site:

http://www.robynmiller.net/video-games-films

#digiPres #softwarePreservation #archival #gamedev #myst #cyan

Thanks to contributer demik, Snow can now print from your emulated system to a PNG, using an emulated Apple LaserWriter IISC!

To try it, grab the bleeding edge build and check out https://docs.snowemu.com/manual/printing on how to set it up

The reverse engineering effort is written up here: https://68kmla.org/bb/threads/laserwriter-iisc-scsi-protocol-reversed-for-emulator-implementation.52165/

Printing - Snow

Oh wow! The newly released version 1.4.0 of the Snow Macintosh emulator now even runs on a Raspberry Pi Zero 2. Previous versions only showed a black screen.

It comfortably fits into the 512 MB of available RAM, using about 50-60% of it. The downside - two CPU cores almost pegged to 100% still only result in about 1/3rd real world speed for compact 68000 Macs (emulating a Mac Classic or Mac Plus in my case). This is slow - considering how slow these machines already were.

But hey, it works!

@[email protected]

#retrocomputing #raspberrypi #snowemu #tinymac
Made a little booboo in 1.4.0 so there's 1.4.1.. 1.4.0 has disappeared. Nothing to see, move along ๐Ÿ‘€

Snow 1.4.1 is out!

This release brings audio CD and cue/bin image support to Snow! Also added host/guest clipboard sharing, more options to tweak fast-forward mode, native file dialogs, improved mouse control in fullscreen, a new audio backend and many other ease of use features!

Full changelog and downloads: https://github.com/twvd/snow/releases/tag/v1.4.1

Release v1.4.1 ยท twvd/snow

This release brings audio CD and cue/bin image support to Snow! Big thanks to @beholdnec for contributing this. Also added host/guest clipboard sharing, more options to tweak fast-forward mode, nat...

GitHub