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From: star@fluke.UUCP (David Whitlock)
Newsgroups: net.micro.amiga
Subject: Re: Graphics Line Overlay with Dot Matrix Printer (need help)
Message-ID: <3041@vax4.fluke.UUCP>
Date: Wed, 22-Jan-86 01:03:10 EST
Article-I.D.: vax4.3041
Posted: Wed Jan 22 01:03:10 1986
Date-Received: Thu, 23-Jan-86 22:04:30 EST
References: <3030@vax4.fluke.UUCP> <572@amiga.amiga.UUCP>
Distribution: net
Organization: John Fluke Mfg. Co., Inc., Everett, WA
Lines: 44

> 
> 	Ok, I admit it I goofed!  The code inside the epson driver tells
> the printer to advance 7/72 inch each time a pass of the print head
> is made instead of the proper 8/72 inch. Unfortunately, up until now,
> no one had caught this error. This will be fixed in the next release
> (rev 1.2) of the software. There is a solution until then though.
> The source code for the epson driver will be in the ROM kernal manual
> and you can type it in, change the line in error, and re-compile it.
> I'll try to get the change in the manual but it may be too late.
> 
> 	The line in error is in the epson 'render.c' function.
> 
> INCORRECT:
> if (err=(*(PD->pd_PWrite))("\0331",2)) return(err);
> /* select 7/72 inch spacing */
> 
> CORRECT:
> if (err=(*(PD->pd_PWrite))("\0333\030",3)) return(err);
> /* select 24/216 (8/72) inch spacing */
> 
> 	Sorry for the inconvience. Please note that this only affects
> the EPSON, EPSON_JX-80, and MPS-1000 drivers. All the other gfx
> drivers are correct. This problem is NOT in the Okimate-20 driver.
> Okimate has released a new eprom for the Okimate-20 which gives
> the user the option of overlapping lines (sometimes) or
> white spaces between lines (sometimes). This is due to the
> 'play' in the paper advance mechanism.
> 
> 	Regards, David Berezowski (CBM/AMIGA East Coast)


No where can I find the source to 'render.c' in the 'virtural array'
Rom Kernal Manual without an index.  Would you please post this source
so that everyone concerned with the above problem, can correct it asap.


-- 


-- Dave Whitlock

        {decvax!microsof,uw-beaver,ssc-vax,allegra,lbl-csam}!fluke!star

John Fluke Mfg. Co., 33031 Schoolcraft Road, Livonia, MI 48150