Re: FW: Help! Asteroids! Please!!!!!!!

Older EPROMS such as the 2716 and 2732 take 50 mS per
address to program, period. This translates to 2 minutes
for a 2716 or 4 minutes for a 2732.

Newer EPROMS use some really funky algorithms where the time
taken varies based on how receptive the part is to being
programed. This vastly speeds up what would otherwise take
forever due to the larger size of the parts.

Paul Sommers wrote:

>
>
> Okay - I will try that today (5:15am here and still at
> work - Y2K and the world survived).
>
> I have noticed when programming 2716's (and some other
> Eproms) that some program really quickly and some really
> slowly.
>
> Is this due to the design of particular eproms, or because
> there is a problem with the eprom???
>
> Happy New Year to you guys too!
>
> (I just picked up a truck load of money for doing very
> little - I feel like I'm back in the 80's)
>
> Paul
>
> ----------
> From: John Robertson
> Reply To: vectorlist@lists.cc.utexas.edu
> Sent: Saturday, 01 January 2000 03:22
> To: vectorlist@lists.cc.utexas.edu
> Subject: Re: FW: Help! Asteroids!
> Please!!!!!!!
>
> This is a place where the Fluke 9010A shines! It
> checks ram, rom and I/O at
> system speed...mind you if you don't have one, then
> replace the Eproms, be
> careful to get 350ns or faster. Some eproms seem to
> slow down on access
> time as they get older, so if you start with faster
> ones it gives you a
> margin for aging. The board self test should be able
> to identify the bad
> Eprom, after all it is at system speed...leave the
> game in self test, and
> press the RESET button every half hour or so. Oh, be
> sure to have the
> monitor unplugged during tests, you will know when
> the game is OK when you
> get normal game sounds after coining and "playing"
> the game, then plug the
> monitor back in (with power off, of course) and see
> what shows up.
>
> Happy New Year!
>
> John :-#)#
>
> At 05:36 AM 12/31/1999 -0500, you wrote:
> >I'm inclined to agree with Rodger. Had an Asteroids
> Deluxe board that did
> >the very same thing: gave a self-test with no
> errors, but couldn't boot
> >in game mode. A fresh set of roms did the trick,
> now it works fine.
> >
> >P2
> >>-----Original Message-----
> >
From: Rodger Boots
>
> ><<mailto:rlboots@cedar-rapids.net>rlboots@cedar-rapids.net>
>
> >>To:
> <mailto:vectorlist@lists.cc.utexas.edu>vectorlist@lists.cc.utexas.edu
>
> >><<mailto:vectorlist@lists.cc.utexas.edu>vectorlist@lists.cc.utexas.edu>
>
> >>Date: Friday, December 31, 1999 4:32 AM
> >>Subject: Re: FW: Help! Asteroids! Please!!!!!!!
> >>
> >>REPLACE THE ROM!! Just because the programmer says
> it's OK doesn't mean
> >>it runs fast enough for the game to work with it.
> >>
> >>
> >>
>
> John's Jukes Ltd. 2343 Main St., Vancouver, BC,
> Canada V5T 3C9
> Call (604)872-5757 or Fax 872-2010 (Pinballs,
> Jukes, Video Games)
> http://www.flippers.com
> "Old pinballers never die, they just flip
> out."
>

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