Jiffy Dos

[swordfish1030]

I am thinking of installing Jiffy Dos on my C128 and on 2    1571's.. is there any thing it is not compatiable with?
I know of the increase in speed.. but are there any ill effects?:pucko:

Thanks!

[bacon]

I have had JiffyDOS for four or five years now and seen no ill effects. The neat thing is, if a program doesn't work with JiffyDOS, you just flick a switch and you're back to boring old Commodore DOS.

[swordfish1030]

do you have the reset on the drives to disable jiffy dos on them too? Or just the C128

[bacon]

I only have JiffyDOS in one drive, a 1541-II, and I have a switch installed. No reset button though. If I need to turn JiffyDOS off (almost never happens) I flick the switch on the computer and the drive and then hit the reset switch on the computer which resets the drive too.

[swordfish1030]

cool new, thanks!

[11001010]

Correct me if I'm wrong, but I don't think a switch is necessary for the 1571 drives.

[zeke1312]

Short of opening the C128 or 1581, is there a way to check and see if JiffyDos is installed?

[Andrew Wiskow]

Short of opening the C128 or 1581, is there a way to check and see if JiffyDos is installed?

Yes... Just read the error channel as soon as the drive is turned on.  If it's got an original Commdore ROM, then it'll say something like 73,CBM DOS V2.6 1541,00,00... If it's got JiffyDOS, then it'll say 73,JIFFYDOS 5.0 1541,00,00 (version number may vary depending on the version of the chip installed)...

You can use this small BASIC program to read the error channel:

Code Select Expand

0 OPEN1,8,15
1 GET#1,A$:?A$;:ON-(ST=0)GOTO1:CLOSE1
Just change the "8" in line 0 to whatever device you want to read the error channel on.  You need to do this as soon as the drive has been turned on, before loading anything.  So if you've already used the drive, simply turn it off and back on again, then run this program.  Otherwise, it'll just read 00,OK,00,00.

-Andrew

[airship]

Or instead of turning it off and on, you can reset the drive first with "U9":

0 OPEN 1,n,15, "U9"
1 GET#1,A$;?A$;ON(ST=0)GOTO1:CLOSE1

[8502]

I am thinking of installing Jiffy Dos on my C128 and on 2    1571's.. is there any thing it is not compatiable with?

Installed JiffyDOS 6 in my c128dcr last week

My observations so far:

- C2N Datasette no longer functions (?ILLEGAL DEVICE NUMBER ERROR if attempt is made)

- International keyboard support not working on European machines (eg, ASCII/DIN key etc.)

In both cases it's because the code in the Kernal has been removed to make space for JiffyDOS.
Who cares about these functions though?

- if BASIC8 is running, @ prefix is hijacked by BASIC8 - can't remember if / prefix still works.

Correct me if I'm wrong, but I don't think a switch is necessary for the 1571 drives.

No switch required for the 1581 either.

[swordfish1030]

wiskow, I love your printer stand!

[airship]

Pff! MINE will look just as good as Wiskow's, but MINE will play chess*!

*If I ever get it working, that is...

[Andrew Wiskow]

wiskow, I love your printer stand!

Thanks...  Just goes to show you that even dead Commodore hardware has its uses.  ;-)

-Andrew