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- Newsgroups: comp.sys.cbm
- Path: sparky!uunet!munnari.oz.au!spool.mu.edu!umn.edu!csus.edu!netcom.com!fuzzy
- From: fuzzy@netcom.com (Fuzzy Fox)
- Subject: Re: 16 bit CRC source?
- Message-ID: <h=yn76j.fuzzy@netcom.com>
- Date: Mon, 14 Sep 92 06:10:41 GMT
- Organization: Foxes 'R' Us - Seven locations to serve you
- References: <9209101596@zone4.ocunix.on.ca> <wzwnzyr.fuzzy@netcom.com> <1992Sep12.234219.22101@jhunix.hcf.jhu.edu> <92091326427@zone4.ocunix.on.ca>
- Lines: 41
-
- andrew@zone4.ocunix.on.ca (Andrew Low) writes:
-
- >There is no point in writing something as general as a file transfer
- >protocol and binding it to hardware that a few have (few, is less than half
- >all existing C64 users). The only hardware that should be considered is
- >a 64 and a 1541. Support for 2400 with no swiftlink should be considered.
- >1200 might turn out to be the max.
-
- I almost agree. However, there are a large number of 64 users that have
- a 1571, or 1581, and they should not be discounted. Naturally each
- drive would require custom code. Alost note that there are many users
- with HD's on their 64's, and it's be a shame if they couldn't use what
- we create. But, one step at a time. :)
-
- >Does anyone out there
- >have the ability to create the custom drive routines Fuzzy Fox was
- >talking about?
-
- Well, actually I always did want to do something like this, I just never
- got around to it. I always loved writing disk drive code. I did write
- a nifty fastloader way, way back...
-
- >Or does anyone know of existing software which does
- >this? (maybe we can reverse engineer something?)
-
- I saw this technique used in a couple of games, usually Epyx games.
- They would play music and display raster interrupts while loading the
- game, which requires the drive routines not to get in the way of any
- incoming interrupts. I see no reason why this can't be extended to
- allow NMI interrupts.
-
- I don't have any working code, but the theory is sound, and shouldn't
- take much to implement. The real trouble is that the DOS would be
- bypassed, forcing us to recreate a smaller DOS, but that's pretty
- standard for most fast-save routines in cartridges.
-
- --
- #ifdef TRUE | Fuzzy Fox fuzzy@netcom.com
- #define TRUE 0 | a.k.a. David DeSimone an207@cleveland.freenet.edu
- #define FALSE 1 |
- #endif | How's my posting? Call 1-800-ALT-FLAME
-