home Asteroids | Donkey Kong | Duck Hunt | Frogger | Moon Patrol | Pacman | Pong | Simon | Space Invaders | StarCastle | Tertis

1986
                   
1987
1988
1989
2000
2001
2002
2003
2004
2006
   

Home

Asteroids | Donkey Kong | Duck Hunt | Frogger | Moon Patrol | Pacman | Pong | Simon | Space Invaders | StarCastle | Tertis

Date: 1989-01 atari800xl.org comp.sys.atari.8bit
Fast Scan pot reads on 800XL - a problem?  
 
1.  Charles Green  
 More options Jan 2 1989, 7:23 am
Newsgroups: comp.sys.atari.8bit
From: char@c3pe.UUCP (Charles Green) -
Date: 1 Jan 89 22:23:41 GMT
Local: Mon, Jan 2 1989 7:23 am
Subject: Fast Scan pot reads on 800XL - a problem?
| | | | | | |
I am attempting to write a simple oscilloscope program for my Atari 800XL, and
have run into what appears to be a snag.  Although I can appreciate that the
accuracy of the reading may be reduced by a few significant bits, it appears
instead that, depending on the pot value, *most* of the readings I get are
completely bogus.  I *think* I am doing all of the necessary steps in the
correct order, as specified in Atari's Technical Reference Manual for the 800.
Has this interface changed somehow for the XL series?

I will, of course, summarize any mailed responses.  Thanks!

Charles Green, c3pe!char@decuac.dec.com
--
Charles Green, C3 Inc                           charles%c@decuac.dec.com
ex::!echo Gotcha:               (vi modeline test - is your system secure?)


 
DOS III to DOS 2.x  
 
1.  Robert Spotts  
 More options Jan 5 1989, 4:46 am
Newsgroups: comp.sys.atari.8bit
From: r@vax1.acs.udel.EDU (Robert Spotts) -
Date: 4 Jan 89 19:46:59 GMT
Local: Thurs, Jan 5 1989 4:46 am
Subject: DOS III to DOS 2.x
| | | | | | |

 Does anyone know how to transfer DOS III files to DOS II?

                             Rob S.


 
 
2.  Gary D Duzan  
 More options Jan 5 1989, 7:00 am
Newsgroups: comp.sys.atari.8bit
From: gdt@vax1.acs.udel.EDU (Gary D Duzan) -
Date: 4 Jan 89 22:00:48 GMT
Local: Thurs, Jan 5 1989 7:00 am
Subject: Re: DOS III to DOS 2.x
| | | | | | |

In article <2@udccvax1.acs.udel.EDU> r@vax1.acs.udel.EDU writes:

> Does anyone know how to transfer DOS III files to DOS II?

>                             Rob S.

     Go through DOS 2.5. There is a 2.5 utility to convert 3 -> 2.5. Since 2.5
is compatible with 2, that should do it.

                                        Gary Duzan
                                        Time  Lord
                                    Third Regeneration
                                 Atari Enthusiast Extreme


 
 
3.  Chris_F_Chiesa  
 More options Jan 8 1989, 10:55 am
Newsgroups: comp.sys.atari.8bit
From: Chris_F_Chi@cup.portal.com -
Date: 8 Jan 89 01:55:04 GMT
Local: Sun, Jan 8 1989 10:55 am
Subject: Re: DOS III to DOS 2.x
| | | | | | |

(I haven't yet figured out how to get Portal to 'include' text of previous
postings... sigh...)

I once found myself needing to transfer files from DOS 3 format to DOS 2 format,
but without access to DOS 2.5 or any other "transfer utility" program.  I was
able to solve the problem by running a BASIC program that started out running
under DOS 3, read data from the "original" file into a buffer string, then
somehow (I have unfortunately forgotten the details but you might be able to
re-engineer it) warm-rebooted into DOS 2 without losing the data, then opened
a file (now under DOS 2) and wrote the data back out.  From the program's
point of view, it "transparently" READ one file, and WROTE another, using
DOS-version-independent OPEN, GET, and PUT statements -- but with the altera-
tion, in the middle, of the underlying DOS support, it wound up transferring
data from one format to the other.  (It is worth noting that transfers in the
OTHER direction did NOT work when I tried them; apparently DOS 3 boots up
differently from DOS 2, or its memory requirements are different, with the
result that the technique I used (I believe it was a USR call into the bootup
code of the OS) works ONLY in ONE direction, and not in the other.  This means
that you have to reboot anew into DOS 3 for each file you transfer.  Also, if
the file to be transferred is larger than the buffer memory size, you have to
transfer the file in several pieces (transfer the first N bytes; then reboot,
alter the program to SKIP the first N bytes of the file and transfer the NEXT
N bytes..) and then re-APPEND them under DOS 2 when you get them there.

All in all, it's probably EASIER for you to find an existing utility, but if
that pans out, this is one way to do the job with what you already have.

Chris Chiesa

   Formerly 'cfchi@bsu-cs.UUCP'


 
 
4.  Tom Vaughan  
 More options Jan 10 1989, 1:29 pm
Newsgroups: comp.sys.atari.8bit
From: vaug@canisius.UUCP (Tom Vaughan) -
Date: 10 Jan 89 04:29:54 GMT
Local: Tues, Jan 10 1989 1:29 pm
Subject: Re: DOS III to DOS 2.x
| | | | | | |

In article <2@udccvax1.acs.udel.EDU>, r@vax1.acs.udel.EDU (Robert Spotts) writes:

>  Does anyone know how to transfer DOS III files to DOS II?

>                              Rob S.

Try using the COPY32.com program that comes on the DOS 2.5 disk.  This
is its sole purpose in life.  :)

 
DLI etc  
 
1.  Brett S Bourbin  
 More options Jan 6 1989, 4:35 am
Newsgroups: comp.sys.atari.8bit
From: b@sylvester.umd.edu (Brett S Bourbin) -
Date: 5 Jan 89 19:35:47 GMT
Local: Fri, Jan 6 1989 4:35 am
Subject: Re: DLI etc
| | | | | | |

In article <3@bbn.COM> slac@BBN.COM (Stan Lackey) writes:
>I have finally done my first DLI <yawn> so what's the big deal?
>Well - I first did the following.  I changed the display stuff at
>some point on the screen, to change the color registers and the character
>set, and relied on the built in vertical blank routine to change them
>back for the top half of the screen again.  Well, it seems like
>CRITIC gets set a lot more than I expected, as there was a lot of
>flicker on the to half.  So, I made an addition to the first stage
>VBI to set the character set and colors back all the time.

Well, like you said, the VBI CRITIC flag is there for a reason.  It is
needed for the OS I/O routines.  Stealing the first stage VBI and doing some
hardware poking, then vectoring to the second stage is your best bet.  Just
remember that during the horizontal blank (DLI), you only have enough time
to change one or two registers after the WSYNC.

The _Big Deal_ about DLI's is what you can do with them.  Sure, everyone
today can change the colors of the screen midway down and change the
character set pointer.  But the DLI is more than that.  I have used the DLI
in the past to simulate a 3-D scrolling maze, where the VBI created a custom
DLI each time the player moved.

I also have created a "virtual sprite" system with the use of the DLI which
allows many, many more sprites than the 4 hardware limit.

Just some food for thought.

--Brett S Bourbin
 __  __   _  __  _  Instructional Computing Programs -- Univ of Maryland
|  ||  | / ||  || \
|  ||  ||  ||  ||  |  INTERNET: b@SYLVESTER.UMD.EDU
|  ||  ||  ||  ||  |            bbour@UMD5.UMD.EDU
 \_||_/ |__||__||__|       BIX: brettb
    College Park        BITNET: bbourbin@UMDD


 
status of archiehves  
 
1.  David L. Gillette  
 More options Jan 6 1989, 3:20 pm
Newsgroups: comp.sys.atari.8bit
From: gille@MARLIN.NOSC.MIL (David L. Gillette) -
Date: 6 Jan 89 06:20:15 GMT
Local: Fri, Jan 6 1989 3:20 pm
Subject: status of archiehves
| | | | | | |

  I find that the files 8-bit.cat and 8-bit.text are of zero length.
This makes it very hard to find out about additions to the archives
since the last time I downloaded these files. For reference I was trying to
aquire these files on 1-5-89. I did aquire the read.me file at this time.

David Gillette
gille@nosc.mil


 
 
2.  Tom Vaughan  
 More options Jan 11 1989, 7:03 am
Newsgroups: comp.sys.atari.8bit
From: vaug@canisius.UUCP (Tom Vaughan) -
Date: 10 Jan 89 22:03:05 GMT
Local: Wed, Jan 11 1989 7:03 am
Subject: Re: status of archiehves
| | | | | | |

    What is the status of the bitnet program archives, and where are they?


 
 
3.  John R. Dunning  
 More options Jan 12 1989, 3:28 am
Newsgroups: comp.sys.atari.8bit
From: j@STONY-BROOK.SCRC.SYMBOLICS.COM (John R. Dunning) -
Date: 11 Jan 89 18:28:00 GMT
Subject: status of archiehves
| | | | | | |

    Date: Thu, 5 Jan 89 22:20:15 PST
    From: gille@marlin.nosc.mil (David L. Gillette)

      I find that the files 8-bit.cat and 8-bit.text are of zero length.
    This makes it very hard to find out about additions to the archives
    since the last time I downloaded these files. For reference I was trying to
    aquire these files on 1-5-89. I did aquire the read.me file at this time.

The catalog files for the 8-bit software archives have been repaired.
Sorry about that (I ran into quota problems on Score).

Some new stuff has made it into the archives lately; there's the latest
versions of SuperARC/UnARC, VTOCFIX, DISKCOMM etc, as well as GTERM.  If
anybody cares, I'll send out periodic announcements of new stuff.


 
Heat problem ???  
 
1.  Ken Tremblay  
 More options Jan 6 1989, 9:24 pm
Newsgroups: comp.sys.atari.8bit
From: tremb@cg-atla.UUCP (Ken Tremblay) -
Date: 6 Jan 89 12:24:34 GMT
Local: Fri, Jan 6 1989 9:24 pm
Subject: Heat problem ???
| | | | | | |

    I have an 800XL that seems to have a heat problem.  When the
  system is on for an hour an a half the screen starts giving me
  multiple characters flashing randomly.  Has anyone else seen
  this kind of problem ?  Could it be the RAM chips ?  The RAM in
  my system are NEC D4164C-15 and -3.  I can replace them if I knew
  what to replace them with, any ideas ?
                                            Thanks for any help.

--
         Compugraphic               cg-atla!tremblay
         200 Ballardvale
         Wilmington, Ma.            ...but you knew that.


 

- - - -
End