#JiffyDOS
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retroguybry.bsky.social
What another one! 🙂 #Commodore64 #C64 #JiffyDOS
December 31, 2024 at 3:31 PM
fuzzweed.co.uk
Holy cow! SD2IEC running under Jiffydos 🚀🏎️✈️🏃

WHY WAS I NOT INFORMED
August 24, 2025 at 7:09 PM
amigalove.com
All work and no play makes Ja…

Hang on, this work is actually fun.
Photo of my Commodore 128 with GeoWrite on the screen. I started typing up my jiffyDOS cheat sheet.
January 10, 2026 at 4:02 PM
studio8502.ca
According to Jim Brain on Lemon64, there will be a bundle deal on JiffyDOS ROMs for the C64 Ultimate.

I cannot recommend this to you highly enough. A C64 is not complete without JiffyDOS.
September 26, 2025 at 6:16 PM
janbeta.net
Remember the DolphinDOS x JiffyDOS patch for the #C64? It uses some of the superior disk routines from Dolphin with the Jiffy fastloader so you don’t need a parallel cable (just the Jiffy ROM in the disk drive). I just put it on my #C64Ultimate. Also: rainbow startup screen! csdb.dk/release/?id=...
Screenshot of the Dolphin/Jiffy patch running on my C64U. It shows the blue startup screen with a C65-inspired rainbow and the JiffyDOS startup message.
April 25, 2026 at 9:12 AM
janbeta.net
New video! I'm trying to burn a new KERNAL ROM for my dad's Commodore 64 on the actual C64.

YouTube: youtu.be/2uAHMyOmTH4
PeerTube: makertube.net/w/5FAWnVLK46...

#DELA #EPROMMER #Merlin #EPROM #Programmer #KERNAL #JiffyDOS #DolphinDOS #C64 #Commodore #Commodore64 #RetroComputing #VintageComputing
Burning a C64 KERNAL on an actual C64
YouTube video by Jan Beta
youtu.be
June 22, 2026 at 3:52 PM
studio8502.ca
Vice: Installed and set up with JiffyDOS.

Calypsi 6502: Installed.

Ideas: Brewing.

Hope of completing something for once: Rising
March 15, 2025 at 6:19 PM
loudscotsbloke.bsky.social
My Commodore 128. This gorgeous monster is getting some love today. JiffyDos upgrade, and a shiny new PSU.
March 8, 2025 at 10:47 AM
fastjack.bsky.social
To kick off my bsky timeline here's a link to my re-typeset version of the JiffyDOS manual. https://maciaszek.net/26782/jiffydos-users-manual/
JiffyDOS User's Manual
Sometime in 2016 I recreated the JiffyDOS User's Manual in InDesign. This was just an excercise to get more comfortable with InDesign. Long story short, here is the result: JiffyDOS 6 Users Manual (in...
maciaszek.net
July 23, 2023 at 8:15 PM
theoasisbbs.bsky.social
MaccJiffyDOS Patch for C64 JiffyDOS 6.01 Adds REU Features and Smart Upgrades
#Commodore64 #JiffyDOS #RetroComputing #VintageComputing

theoasisbbs.com/maccjiffydos...
MaccJiffyDOS patch - The Oasis BBS
MaccJiffyDOS patch upgrades C64 JiffyDOS 6.01 with REU support, boot fixes, new commands, and quality of life improvements.
theoasisbbs.com
February 25, 2026 at 1:42 PM
janbeta.net
You can also just run a slightly modified version of DolphinDOS on the #C64Ultimate, as it turns out. It is WAY faster than any JiffyDOS derivatives (but doesn’t have a rainbow startup screen). Here’s the variant I’m currently using: github.com/donnchawp/Do...
DolphinDOS 2.0 startup screen running on my C64 Ultimate.
April 25, 2026 at 1:55 PM
gordon.plus
Instantly? Not from tape, or the achingly slow 1541 without jiffydos or a turbo loader!
September 3, 2025 at 1:09 PM
theoasisbbs.bsky.social
JiffyDOS Hidden Commands Offer Useful C64 Shortcuts
#Commodore64 #C64 #JiffyDOS #RetroComputing #Commodore #BASICProgramming #RetroRottie
theoasisbbs.com/jiffydos-hid...
JiffyDOS Hidden Commands Offer Useful C64 Shortcuts - The Oasis BBS
Retro Rottie demonstrates JiffyDOS hidden commands for drive control, file management, quick disk tasks, and recovering a BASIC program.
theoasisbbs.com
September 8, 2026 at 12:23 PM
leonardeuler.bsky.social
JiffyDOS
May 14, 2026 at 2:21 AM
dantootill.bsky.social
I do love the boot screen you get with this modded JiffyDOS kernal. Lots of C65 / MEGA65 energy, like this breadbin really means business.
January 17, 2024 at 8:26 PM
studio8502.ca
REMEMBER: Buy your copy of JiffyDOS for your C64 Ultimate from the proper owner, it's only $29 for all the stuff you need to *drastically* accelerate your disk access!

store.go4retro.com/commodore/ji...
JiffyDOS 64 Ultimate ROM Overlay Image Pro Pack
store.go4retro.com
January 2, 2026 at 10:35 PM
theoasisbbs.bsky.social
MEGA1581 Drive for the MEGA65 Finally Fills the 1581 Void
#MEGA65 #JiffyDOS #MEGA1581 #BitBinders #C65 #IECBus #Floppy1581 #RetroHardware #RetroComputing #VintageComputing

theoasisbbs.com/mega1581-dri...
MEGA1581 Drive for the MEGA65 Finally Fills the 1581 Void - The Oasis BBS
BitBinders' MEGA1581 drive for the MEGA65 is a 100% compatible 1581 replica with JiffyDOS built in. Here's what you need to know.
theoasisbbs.com
June 15, 2026 at 1:17 PM
leonardeuler.bsky.social
Does fastload even work with Jiffydos?
August 15, 2026 at 5:27 PM
theoasisbbs.bsky.social
JiffyDOS C64 Ultimate Install Shows Faster Loads on Commodore 64 Ultimate
#Commodore64 #C64 #JiffyDOS #Commodore64Ultimate #RetroComputing #RetroTech #GEOS #RetroInnovations

theoasisbbs.com/jiffydos-c64...
JiffyDOS C64 Ultimate - The Oasis BBS
JiffyDOS C64 Ultimate video shows install steps, ROM setup, and faster load times on a Commodore 64 Ultimate.
theoasisbbs.com
April 23, 2026 at 12:52 PM
theoasisbbs.bsky.social
JiffyDOS C64 Guide: CityXen Explains Speed, Shortcuts, and Setup
#Commodore64 #JiffyDOS #C64Ultimate #CityXen #RetroComputing #Commodore #C64 #RETROInnovations

theoasisbbs.com/jiffydos-c64...
JiffyDOS C64 Guide - The Oasis BBS
JiffyDOS C64 Guide shows how CityXen explains faster disk access, handy shortcuts, and easy setup on the Commodore 64 Ultimate.
theoasisbbs.com
April 13, 2026 at 12:53 PM
leonardeuler.bsky.social
This is why I love JiffyDOS
August 18, 2025 at 11:41 PM
kefkafloyd.bsky.social
Yesterday I picked up a Commodore 128D with an Amiga 1080 monitor, a 1581, an old VIC-style 1541, and a 1526 printer from a local for about $300. It's in need of some resto work and a deep bath, but everything works. Also has JiffyDOS!
Commodore 128D with Amiga 1080 monitor, 1541 disk drive, 1581 disk drive, and Commodore 1526 dot matrix printer JiffyDOS 6.0 Beta ROM for C128D
January 5, 2026 at 8:51 PM
studio8502.ca
Well that was easier than expected. Now all the assets are stored on disk RLE-compressed, which drastically speeds up loading assets from disk with or without JiffyDOS.
March 3, 2026 at 5:55 PM
theoasisbbs.bsky.social
Speed Up Your Commodore 1541 with a Dual-ROM JiffyDOS Mod
#Commodore64 #1541DiskDrive #C64 #JiffyDOS #RetroComputing #C64Mods #Retronaut #CommodoreHack

theoasisbbs.com/speed-up-you...
Speed Up Your Commodore 1541 with a Dual-ROM JiffyDOS Mod - The Oasis BBS
Retronaut shows how to install a dual-ROM adapter in a Commodore 1541 disk drive, allowing users to switch between JiffyDOS and the original KERNAL ROM for speed and compatibility.
theoasisbbs.com
April 22, 2025 at 1:13 PM
nafmo.social.vivaldi.net.ap.brid.gy
I now have #jiffydos on my #commmodore #vic20. Not sure how useful it is, though...
VIC20 start-up screen: JIFFYDOS (C)1889 CMD 28159 BYTES FREE READY.
October 2, 2025 at 7:01 PM