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- Path: nntp.teleport.com!sschaem
- From: sschaem@teleport.com (Stephan Schaem)
- Newsgroups: comp.sys.amiga.programmer
- Subject: Re: Amiga programmers in deep shit...
- Date: 7 Jan 1996 04:16:57 GMT
- Organization: Teleport - Portland's Public Access (503) 220-1016
- Distribution: world
- Message-ID: <4cnhfp$jjo@maureen.teleport.com>
- References: <19960104.549D10.14D00@tbag.org> <4cjjbr$4im@maureen.teleport.com> <4cmvp3$mis@mordred.cc.jyu.fi>
- NNTP-Posting-Host: julie.teleport.com
- X-Newsreader: TIN [version 1.2 PL2]
-
- Aki Laukkanen (daeron@co.jyu.fi) wrote:
- : Stephan Schaem (sschaem@teleport.com) wrote:
-
- : : Well, imagine this: a game play at 60fps. require maybe 70 to 80% of
- : : the frame each frame for its logic. Where in this setup can you call
- : : the OS to read data?
- : : The floppy controler use assigned DMA slot, basicly read the data for
- : : free. The only job you need to timeslice is MFM decoding (with
- : : checksum to please people with flacky drive), maybe decompressing .
-
- : Picture this, lets assume that you really need to load data in game (like
- : your example some messages earlier). You have many hundred kBs to read. So
- : what'll happen? Yes, there's no way the _slooooow_ floppy drive will make
- : it in time and there we are like sitting ducks. Bloody stupid even to
- : consider floppy drives. They're obsolete. This is the age of hard disks and
- : CD-ROM, not stone age.
-
- Before saying "bloddy stupid" think will you...
- Maybe you need simpler picture:
-
- You have a 4500x200 8bit picture on a floppy. this picture is the background
- for an horizontal scrolling map (Put what ever you want on top).
- now, as you scroll the map, you can load it from floppy tiny bit at a
- time... No need to have in in memory.
-
- This is a consideration for floppy amiga only... No HD, non extra mem
- present, use ROVM...
-
- And we are not on the PC platform here, CDROM is not a popular item (Unless
- you design for the cd32. BTW, cdrom game do something similar by playing
- audio track via the drive. they dont preload the tracks , now that would be
- 'bloddy stupid':)
-
- Stephan
-
-