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Date: 1987-12 atari800xl.org comp.sys.atari.8bit
PC/VCR Integration  
 
1.  Sigrid Grimm  
 More options Dec 15 1987, 5:01 am
Newsgroups: comp.sys.atari.8bit, comp.sys.amiga
From: sig@geac.UUCP (Sigrid Grimm) -
Date: 14 Dec 87 20:01:48 GMT
Local: Tues, Dec 15 1987 5:01 am
Subject: PC/VCR Integration
| | | | | | |

Hello and SEASINGS GREETONS -

I am new to both the comp.sys.atari.8bit group as well as the comp.sys.amiga
group. From what I understand one/both of these machines has the potential
for what I need to do.  I am hoping that someone out there in net.land will
be able to help me figure out what is needed for the following:

  -hook up a VCR to a pc
  -organize, access and modify video content (ie. on a "frame-by-frame" basis)
  -superimpose graphics (free-hand and text) on video content
  -integrate sound (e.g., narration/music) with video/graphics content

So what you would end up with is sort of like one of those movies you see
in highschool science class where there is a mixture of people in labcoats
talking, "live footage" of some phenomenon and then some graphics superimposed
on the "live footage" which the narration/music describes, etc.

I saw a commercial on TV awhile back of a guy who is raving about how he can
make his own "music videos" etc with his machine and how you can't do that
with a Mac (or something). I don't remember the name of that particular
machine but any help anyone can offer will be GREATLY APPRECIATED.

Thanking you in advance...
Sincerely,
:-)
Sigrid Grimm   (mnetor, yetti, utgpu !geac!sigrid)
--
           "The greatest good is the knowledge of the union which
            the mind has with the whole nature." -- Spinoza
--


 
(none)  
 
1.  "Sark"  
 More options Dec 18 1987, 5:34 am
Newsgroups: comp.sys.atari.8bit
From: PVI@SCU.BITNET ("Sark") -
Date: 17 Dec 87 20:34:00 GMT
Subject: (none)
| | | | | | |
SEND DIR PS:<BBOARD>ATARI.*

 
 
2.  "Sark"  
 More options Dec 18 1987, 5:40 am
Newsgroups: comp.sys.atari.8bit
From: PVI@SCU.BITNET ("Sark") -
Date: 17 Dec 87 20:40:00 GMT
Subject: (none)
| | | | | | |
SEND DIR PS:<BBOARD>ATARI.*

 
 
3.  "Sark"  
 More options Dec 18 1987, 5:41 am
Newsgroups: comp.sys.atari.8bit
From: PVI@SCU.BITNET ("Sark") -
Date: 17 Dec 87 20:41:00 GMT
Subject: (none)
| | | | | | |
SEND DIR PS:<BBOARD>ATARI.*

 
 
4.  "Sark"  
 More options Dec 18 1987, 5:44 am
Newsgroups: comp.sys.atari.8bit
From: PVI@SCU.BITNET ("Sark") -
Date: 17 Dec 87 20:44:00 GMT
Subject: (none)
| | | | | | |
SEND DIR PS:<BBOARD>ATARI.*

 
TEDIT  
 
1.  HABKE  
 More options Dec 19 1987, 5:26 am
Newsgroups: comp.sys.atari.8bit
From: H@UOFMCC.BITNET -
Date: 18 Dec 87 20:26:00 GMT
Subject: TEDIT
| | | | | | |
I HAVE JUST FINISHED UUDECODING TEDIT. IT LOOKS LIKE A NICE, SIMPLE
  TO USE EDITER. I'M HAVING PROBLEMS TRYING TO FIGURE OUT HOW
 FIND AND DELETE WORK. COULD SOMEONE FORWARD DOCUMENTATION
 OR LET ME KNOW WHICH ISSUE OF ANTIC THIS PROGRAM APPEARED IN.
  THANK YOU
      BILL

 
Double density format questions...  
 
1.  Hans Breitenlohner  
 More options Dec 19 1987, 11:24 am
Newsgroups: comp.sys.atari.8bit
From: h@umd5.umd.edu (Hans Breitenlohner) -
Date: 19 Dec 87 02:24:07 GMT
Local: Sat, Dec 19 1987 11:24 am
Subject: Re: Double density format questions...
| | | | | | |
There are actually three fairly common disk formats in the Atari world:

Single density (FM), 128 byte sectors, 18 sectors per track, 720 sectors per
side, single sided.  This is commonly called "single density".

Double density (MFM), 128 byte sectors, 26 sector per track, 1040 sectors per
side, single sided.  This is commonly called "enhanced density".

Double density (MFM), 256 byte sectors, 18 sectors per track, 720 sectors per
side, single sided.  This is commonly called "double density".

The 810 drive is single density only.

The 1050 drive supports single and enhanced density.

The never released 815 drive would have been double density only.

Various other vendors made drives which support all three densities:  Indus,
Rana, Trak come to mind, there probably are others, too.
There also are upgrades for the 1050 which make it work in all three
densities.

There are also the double sided versions of these formats supported by some
drives (i.e. Percom, maybe others, and now the XF551).

Disk i/o is done by sending sector numbers to the drive, which converts them
to track/record(/side) as appropriate.  Sector numbers start at 1.  For single
sided drives the conversion is the obvious one, but I do not know how the
mapping is done on double sided drives.  --  But:  send me an XF551 (or a
Percom drive) and I will find out for you!! :-)

Since the bootstrap in the os rom does not know about double density drives,
there is a special hack in the drive firmware for this:  Sectors 1 - 3
are treated as if they were 128 bytes long, even in double density.  They
actually are 256 bytes long on the disk, but only 128 bytes are transferred
from/to the sio interface.

There are three methods for changing a drive's density that I am aware of:
1. Most drives will automatically determine the correct density when a disk
   is inserted.
2. Some drives have front panel controls to set the density.
3. Some drives (all multi-density drives except the 1050, as far as I know)
   will accept a configuration command over the sio bus.

A drive's density may be determined in two ways:
1. The Status function returns bits which allow one to distinguish between
   the three popular densities.  All drives support this.
2. Some drives (see comment in 3. above) support a command to read the
   configuration record.

Dos (2.0, 2.5, xl, and Mydos, at least, I haven't looked at any others) set
flags to indicate the sector length, where the byte count/forward link are
located, etc., whenever they are performing i/o operations.  These just happen
to be in the boot block (see "mapping the Atari"), and when a boot block is
written they reflect the state of that disk drive.  This is the information
the boot code uses when loading the rest of Dos.  Dos 2.0 then uses the
status function to determine the sector size for all configured and attached
drives.

Dos 2.0 apparently has 99% of the code needed to support double density drives.
The main things missing are a mechanism to change density of a drive, or even
to let Dos know that the density of a drive has changed, and the code to write
a good copy of DOS.SYS to a boot disk.  There were patches for this posted a
while back, and if needed I may be able to find them.  I don't know if this
support was continued in Dos 2.5.

On double density disks the vtoc is still at sector 360, and the directory
follows.  These sectors are now 256 bytes long, and DOS allocates 256 byte
buffers for them, but only 128 bytes are used.  Since the sector link in
Dos 2.0 and 2.5 is only 10 bits wide, only 1023 sectors per disk can be
used.  Sector 1024 in enhanced density is used for an extension of the vtoc
and sectors 1025 to 1040 are not used.  Mydos supports drives with lots more
sectors, including double sided.  I don't know how they get around this, per-
haps by doing away with the file number in each block, and thus expanding
the size of the sector link.

Well, this is probably lots more than you ever wanted to know about this
subject, so I'll quit now.  I will be glad to answer any additional questions.


 
Analog?  
 
1.  Ray Wilmott  
 More options Dec 20 1987, 5:49 am
Newsgroups: comp.sys.atari.8bit
From: wilm@topaz.rutgers.edu (Ray Wilmott) -
Date: 19 Dec 87 20:49:06 GMT
Local: Sun, Dec 20 1987 5:49 am
Subject: Analog?
| | | | | | |

=================

Just wondering if anybody knows what the deal is with Analog?
They skipped the november issue, and I have yet to see a
December issue! I remember that they skipped last July or
August, and then the following 2 or 3 issues (the last I
received) were very late in coming out. Does anybody know
if they're ever gonna come out with  another issue already?!?!?!?

                        -Ray

PS - Merry Christmas one and all!     :-)

wilm@topaz.rutgers.edu


 
 
2.  Tom_Tom_McComb  
 More options Dec 21 1987, 5:36 am
Newsgroups: comp.sys.atari.8bit
From: Tom_Tom_McC@cup.portal.com -
Date: 20 Dec 87 20:36:41 GMT
Local: Mon, Dec 21 1987 5:36 am
Subject: Re: Analog?
| | | | | | |

Heres the deal with ANALOG. No they are not going bankrupt, as the rumors havc?
When STlog went monthly their printer couldn't handle the load. THye founHey, s
Hopefully things will be back to normal soon. They should start mailing any day
Please be patient folks, they really got the shaft and are working day and nigh
Tom


 
Disk drives  
 
1.  Neil Harris  
 More options Dec 22 1987, 5:45 am
Newsgroups: comp.sys.atari.8bit
From: n@atari.UUCP (Neil Harris) -
Date: 21 Dec 87 20:45:39 GMT
Local: Tues, Dec 22 1987 5:45 am
Subject: Re: Disk drives
| | | | | | |

In article <2@cup.portal.com>, Tom_Tom_McC@cup.portal.com writes:
> The XF551 is onsale in Canada, Poland and Argentina.  Convienent, No?
> ADOS was finished by OSS ages ago. Atari is still awaiting FCC approval for US
> The current guestimate is Jan-Feb '88. But don't go and hold your breath.
> Tom McComb
> Sysop @orner Pub BBS
> 718-948-9146

Whoah!

The XF551 has hit the USA also, within the last couple of weeks.  I know
that Federated stores have them, and some others locally here.

Also, ADOS was recently finished as far as beta testing was concerned.  Not
ages ago, weeks ago.
--
--->Neil Harris, Director of Marketing Communications, Atari Corporation
UUCP: ...{hoptoad, lll-lcc, pyramid, imagen, sun}!atari!neil
GEnie: NHARRIS/ WELL: neil / BIX: neilharris / Delphi: NEILHARRIS
CIS: 70007,1135 / Atari BBS 408-745-5308 / Usually the OFFICIAL Atari opinion


 

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