JiffyDOS

What Is JiffyDOS?

JiffyDOS is a Disk Operating System (DOS) enhancement which gives your VIC-20, C-16, PLUS/4, C-64, or C-128 the disk access speed it has always needed. A chip-for-chip replacement for the Kernal ROM in your computer and the DOS ROM in your disk drive(s), JiffyDOS achieves levels of performance and compatibility unmatched by other disk speed-enhancement products. Outstanding speed, solid compatibility with virtually all hardware and software, and a new set of desperately-needed commands and features, gives your system a new lease on life and the power to compete with today's newer, more-expensive machines. 

 

JiffyDOS should not be confused with Cartridges, Turbo ROMs, Burst ROMs or "Parallel" systems. Ultra-high-speed multi-line serial technology enables JiffyDOS to outperform these products without any of their inherent disadvantages. JiffyDOS leaves all ports on your computer open, works with virtually all software, speeds up PRG, SEQ, REL and USR files, and does not require any extra cabling. Owning JiffyDOS also gives you access to some of the best product support available. 

Convenience

JiffyDOS does more than just enhance speed; its built-in commands and features make using your computer easier and more enjoyable. The built-in commands enable you to perform everyday disk-housekeeping chores without having to type in long BASIC instructions. With JiffyDOS, you can format disks, load, save, scratch and rename files with just a few keystrokes. In addition, a full complement of convenience features makes things even easier. These features include: Directory listing to screen or printer (memory not affected), function key definitions that work with the directory listing (eliminates the need to type lengthy file names), a screen dump, built-in file copier and more. 

Compatibility

JiffyDOS is the most compatible speed-enhancement system available. Designed on the premise that compatibility is just as important as speed, JiffyDOS loads and operates with virtually all software (including copy-protected commercial programs), and is compatible with all Commodore hardware and peripherals. No other disk drive speed enhancement system can come close to working with as much hardware and software. In addition, we back up our claims with a 30-day, money-back compatibility guarantee. 

Installation and Support

JiffyDOS is surprisingly easy to install. Clearly-written, illustrated, step-by-step instructions are provided to guide you through the process of installing the JiffyDOS ROMs in your computer and disk drive(s). Even those who have never seen the inside of a computer before can complete the installation in less than one hour and will find the experience interesting and rewarding. If any questions happen to arise, our product support staff is on hand to provide you with the help you need. 

Benefits of JiffyDOS

Load programs and data up to 15x faster - JiffyDOS speeds the loading of BASIC programs, public-domain software, data files, and virtually all commercial software including programs that are heavily copy-protected. Unlike cartridges, JiffyDOS becomes an integral part of your system, and cannot be rendered ineffective by complex multiple-file load sequences or copy-protection schemes. JiffyDOS keeps working even after a program is up and running enabling you to load data, overlays and program modules at maximum speed. 

 

Save programs and data up to 4x faster - Faster saving with JiffyDOS is automatic and works for you at all times even from within other programs. This means that all your data files and programs will be saved at maximum speed. Unlike other products that boast quicker saving, JiffyDOS does not bypass any error checking routines. 

 

Speed up PRG, SEQ, REL and USR file access - Perhaps the most important feature of JiffyDOS is its ability to speed up all disk accesses including the reading and writing of PRG, SEQ, USR, REL and direct-access files. Unlike Cartridges and Turbo ROMs, JiffyDOS is effective in speeding up the many disk-intensive programs that use these file types including databases, spreadsheets, word processors, and MIDI software. 

 

Fast formatting on 1541 and 1571 - A JiffyDOS-equipped 1541 will format a disk in about 21 seconds. A 1571 with JiffyDOS will format one side in 21 seconds and both sides in about 42 seconds even with a VIC-20, C-16, PLUS/4, C-64, or a C-128 in 64 mode! As opposed to the 9-second format utilities, the JiffyDOS format is built in, will work from within programs, and does not bypass the error checking that ensures you of a properly formatted disk. 

 

Multiple Drive Support - JiffyDOS is the only system that is able to simultaneously speed up 1541, 1571, 1581 and CMD HD and FD drives with VIC-20's, C-16's, PLUS/4's, C-64's, 64C's, SX-64's, and C-128's in both 64 and 128 modes. With JiffyDOS, a 1541 becomes faster than a stock 1571 in 128 mode. JiffyDOS-equipped 1571 and 1581 drives become even faster than they already are with a C-128 in 128 mode! 

 

Quick Printer Output Toggle - A simple 3 key command that switches output from screen to printer and back. This eliminates the need to type the complicated OPEN4,4:CMD4 and PRINT#4:CLOSE4 command sequences. 

 

Two Drive File Copier - Copy PRG, SEQ, REL, and USR files between two drives including CMD's HD hard drives, FD drives, RAMLink and Commodore REU's. This copier is great for back-up and convenient copying of files between devices. 

 

Adjustable Sector Interleave - Allows you to optimize disk-access performance, even with hard-to-speedup software. 

 

Text Screen Dump - Automatic screen mode recognition and printing of uppercase/graphics & lowercase characters. A convenient way to quickly create hard copy of text files, program listings, etc.