Jiffy dos for the Vic20
Jiffy dos for the Vic20
Hey guys i was just reading Comp.sys.cbm and saw this post from Maurice Randall, check it out!!
JiffyDOS for the VIC-20 is currently in the testing and debugging
stage. The VIC-20 powers up fine for the first time today. However,
I've either got to find a way to crunch or stuff 32 bytes somewhere
or eliminate one of the features such as the screen dump feature.
I'm pretty much maxed out on memory. I've been able to retain all
of the other features of JiffyDOS including the built-in file
copier.
Any thoughts on if I should try to leave the screen dump feature
in there? Personally, I've never used it myself. Any input from
VIC-20 users would be appreciated.
-Maurice
If anyone has something to say about it, email the guy now or reply in csc.
Pretty neat.
Leo
JiffyDOS for the VIC-20 is currently in the testing and debugging
stage. The VIC-20 powers up fine for the first time today. However,
I've either got to find a way to crunch or stuff 32 bytes somewhere
or eliminate one of the features such as the screen dump feature.
I'm pretty much maxed out on memory. I've been able to retain all
of the other features of JiffyDOS including the built-in file
copier.
Any thoughts on if I should try to leave the screen dump feature
in there? Personally, I've never used it myself. Any input from
VIC-20 users would be appreciated.
-Maurice
If anyone has something to say about it, email the guy now or reply in csc.
Pretty neat.
Leo
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I swear, I was just thinking about this earlier today. "Why isn't there a JiffyDOS for the VIC20? The Kernals are similar enough..."
This is fantastic news.
I have a lead on a used 20MB CMD Hard drive, plenty of space for lots of VIC games. The subdirectories/partitions would be great for sorting them by 0K/3K/8K/etc. It would be fine with my utility cartridge, but with JiffyDOS would be amazing.
Also, Jim Brain's uIEC works very well with JiffyDOS, so if it ever gets to market this will be a big help.
I'll make a csc post suggesting that Maurice check out this thread.
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From what I've read, JiffyDOS is a Kernal replacement. It's compatible with the old Kernal (apparently), but it also has a switch that restores the original, untouched Kernal.
http://cmdrkey.com/cbm/prodinfo/jiffydos.html
http://cmdrkey.com/cbm/prodinfo/jiffydos.html
I suppose JiffyDOS is a disk speeder to begin with. To develop a tape turbo would be a brand new task compared to adopting the C64 version to run on VIC-20. There exists tape turbos, but they require the program to have been saved with the turbo in the first place. A bit hard to load a non-turbo program in turbo speed.
Anders Carlsson
Hmm, maybe once JiffyDOS is out it might be worth looking at reimplementing the tape routines at the top of expansion memory. I doubt it would take too much memory to do this (maybe 1K max?).
I don't think on an unexpanded VIC jiffydos would be too useful for fastload/save, so in that mode the stock kernel would suffice. But with expanded memory (particularly >8K) I can see how it would be useful, but then there is also extra memory to use to reimplement tape, if necessary.
Does anyone know if there has ever been an attempt to map RAM/ROM into I/O block 2 and 3 ($9800-$9FFF)? I think that would be a real cool and compatible (out of the way) place to put code.
I don't think on an unexpanded VIC jiffydos would be too useful for fastload/save, so in that mode the stock kernel would suffice. But with expanded memory (particularly >8K) I can see how it would be useful, but then there is also extra memory to use to reimplement tape, if necessary.
Does anyone know if there has ever been an attempt to map RAM/ROM into I/O block 2 and 3 ($9800-$9FFF)? I think that would be a real cool and compatible (out of the way) place to put code.
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