NetNews Usenet Archive 1992 #20/NN_1992_20.iso/spool/comp/sys/apollo/3534

Internet Message Format | 1992-09-13 | 2.0 KB

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From: [e-mail]
Newsgroups: comp.sys.apollo
Subject: Re: Versatec plot file format
Summary: It's not tooooo tough
Message-ID: <1992Sep12.002100.1227@polari>
Date: 12 Sep 92 00:21:00 GMT
References: <[e-mail]>
Organization: R Squared, Redmond, WA [phone]
Lines: 32

In article <[e-mail]> [e-mail] ((jt) John Thompson) writes:
>
>
>> I'm trying to find out the file format that the Versatec electrostatic
>> plotters (eg, v80, v7236) use (I'm assuming it's the same for all size
>> plotters).  In other words, if I wanted to print a raster file to a
>> versatec using 'prf -transparent', what should the file look like?
>
>The basic format is identical -- it's a stream of bits that are on (black)
>or off (white).  You must put out enough bytes to fill the entire line --
>there's no 'carriage-return' option.
>
>If you're close to this, you might simply be missing the (previously
>undocumented) prf switch.  Try "prf filename -transparent -vers_pp plot"
>and see what you get.  By default, stuff is sent to the Versatecs in 'print'
>mode unless one of the filters (for a bitmap, for example) toggles it.  If
>you use -transparent, there's no toggle done, and you get that default, giving
>you yards and yards and yards of paper (talk about your 15yard penalty!)
>
The raster scan lines are 2112 bits across for a Versatec V80. The files
are (or at lest used to be) REC formatted (4 bytes length + data).

That is, if my memory serves me (This is from waayyy back in '83 :-) when
I had to write GPR (when there was no such thing) routines for a V80 on
a DN-400.


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