Megalextoria
Retro computing and gaming, sci-fi books, tv and movies and other geeky stuff.

Home » Archive » net.micro.atari8 » Re: Need info: Hardware mod for Sys-Reset
Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend 
Switch to threaded view of this topic Create a new topic Submit Reply
Re: Need info: Hardware mod for Sys-Reset [message #283138] Fri, 14 March 1986 17:48
Anonymous
Karma:
Originally posted by: DYOUNG@USC-ISID.ARPA (C. David Young)
Article-I.D.: ucbvax.8603142258.AA25985
Posted: Fri Mar 14 17:48:25 1986
Date-Received: Sat, 15-Mar-86 21:26:14 EST
References: 
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
Lines: 12

The 400/800 OS will always do a coldstart if you reset the CPU. This is
done by adding a 47 ohm resistor in series with a momentary switch between
the two pads near R156 on the 800 or R183 on the 400. To do the coldstart
you close the coldstart switch and then press RESET. This will cause the
CPU to do what it normally does on powerup, including clearing all of system
RAM. However, the CPU does not clear the extra RAM which may be present
(i.e., anything beyond the 64K that it knows about. This is a great advantage
if you have a ramdisk since this allows you to reboot the system without
losing its contents. Also it is better for your computer than cycling power.

David Young
-------
  Switch to threaded view of this topic Create a new topic Submit Reply
Previous Topic: Need info: Hardware mod for Sys-Reset
Next Topic: Kermit works with ATR8000
Goto Forum:
  

-=] Back to Top [=-
[ Syndicate this forum (XML) ] [ RSS ] [ PDF ]

Current Time: Wed Jul 08 02:37:46 EDT 2020

Total time taken to generate the page: 0.00340 seconds