[Coco] Games that don't fit on floppies (was Super IDE vs. Drive Pak)
gheskett at wdtv.com
Wed Nov 16 16:28:22 EST 2011
On Wednesday, November 16, 2011 04:17:19 PM John W. Linville did opine:
> On Wed, Nov 16, 2011 at 01:06:49PM +0000, Mark Marlette wrote:
> > John Linville could speak to this more as his video player is based
> > upon the critical bandwidth of the player on the S-IDE.
> Actually, I think it is the CPU bandwidth that is the real bottleneck
> for the video player. Obviously it needs a mass storage device as
> fast or faster than the CPU accesses to keep-up.
Which virtually any rotating mass storage can easily do. The coco, with a
6309 in it, using the ldq,stq commands, takes 11 seconds to move a
megabyte. Period. The source or target makes at worst a minuscule
difference in the test results.
I have no clue, and don't recall the test results when these two SCSI
drives were installed in my Amiga, but considering the speed of the Zorro
bus is 7 MHz, and the interface is 8 bits wide, it is extremely obvious
that these disks are so much faster than the coco that disk speed in and of
itself is not a consideration and does not enter into the loading time of a
> The coco3 video player would not exist without some fast way to get
> data into the coco3. Even pre-loading memory is not really an option,
> although you might squeeze a few seconds of play time out of it.
> As for the larger question in this thread, I think it is really a
> judgment call. If you were to produce something that amounted to a
> fairly modern PC or some collection of AVR or ARM or whatever kind
> of boards and it just happened to have a coco as a front-end to it,
> your project would probably not be too interesting to me (at least not
> as a coconut). OTOH, if you add just enough modern technology to your
> project to enable the coco to show it's stuff (e.g. by preprocessing
> some data or providing more storage) then I don't see the problem.
I'll generally agree with this John, however I think I might add one of the
cocoFPGA gizmo's as acceptable.
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
My web page: <http://coyoteden.dyndns-free.com:85/gene>
Stanford women are responsible for the success of many Stanford men:
they give them "just one more reason" to stay in and study every night.
More information about the Coco