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1.
Charles Green
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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?
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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
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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
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Does anyone know how to transfer DOS III files to DOS II?
Rob S.
2.
Gary D Duzan
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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
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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
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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
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(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
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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
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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
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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
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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.
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
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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
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What is the status of the bitnet program archives, and where are they?
3.
John R. Dunning
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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
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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
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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 ???
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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.