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What does JiffyDOS do on a C64 computer?
JiffyDOS is an enhanced DOS for the C64, SX-64, and C128 computers. The software is programmed onto ROM chips that replace the Kernal ROM chip on the motherboard and the DOS ROM chip in the disk drive. JiffyDOS is intended to provide greater speed, commands and convenience than on stock systems.
How is JiffyDOS used to speed up access?
JiffyDOS is designed to speed up the access of all types of files. Program (PRG), Sequential (SEQ), Relative (REL) and User (USR) files can all be accessed faster on JiffyDOS systems. Tables 1 illustrates the speed increases that can be obtained with JiffyDOS.
Can a JiffyDOS disk be switched back to a stock version?
Disks formatted on JiffyDOS systems are identical to those formatted on stock systems. In the event that a program will not load or operate properly with JiffyDOS (such as from a tape, which JiffyDOS disables), the system can be physically switched back to a stock version. This switch remains functional when the system is powered on.
Why does JiffyDOS use the DOS Wedge command set?
This improves compatibility with all hardware devices, and is claimed to give JiffyDOS an advantage over cartridge speedups and other hardware fast loader upgrades which require extra cabling that plugs into one of the computer’s ports. JiffyDOS includes a complete, built-in implementation of the DOS Wedge command set.
Can you use JiffyDOS on a serial bus?
JiffyDOS systems are also compatible with all serial bus devices. JiffyDOS can be installed on disk drives regardless of device number, and devices numbers can be changed on JiffyDOS drives via software or hardware with no problems. In addition, JiffyDOS-equipped disk drives can be used with stock C64 and C128 computers, if necessary.
Is there a JiffyDOS cartridge for the C128?
JiffyDOS for the C128 speeds up disk operations in both C64 and C128 modes and is able to speed up the already quick C128 -mode operation of 1571 and 1581 drives. Some cartridge-based fast loaders are only effective with Program (PRG) files.
Can a JiffyDOS disk drive be used on a stock computer?
JiffyDOS allows the use of multiple dissimilar drives (i.e. 1541, 1571, 1581) whether or not they are equipped with JiffyDOS ROMs. JiffyDOS-equipped disk drives can be used interchangeably on different JiffyDOS-equipped computers, or with stock computers.