Re: DPU-414 terminal

[Ethan M. <merritt@u.washington.edu>]

On Wednesday 21 May 2008 13:19, Thomas Sefzick wrote:
> 
> i got two Seiko DPU-414 thermal printers
> (http://www.seiko-instruments.de/73-0-dpu414.html) and was asking myself
> whether it would make sense to write a gnuplot driver for this printer. it's
> still in production and sold as printer for various measurement devices, so
> it's not really obsolete and i thought this driver could be useful.
> the driver is an extension of 'epson.trm', mainly a merge of some epson/nec
> code with some code from 'pbm.trm'.
> it supports two resolutions: 'normal' (640x480) and 'draft' (320x240)
> font sizes are 'small', 'medium', and 'large' (like in 'pbm.trm') - 
> 
> http://www.nabble.com/file/p17371497/epson.trm_dpu414.patch
> epson.trm_dpu414.patch 

Fine.

Could you please create a new tracker item for the patch and
upload it there?

I notice a few things on a quick look.
The various terminal types covered by this driver can share entry points.
For example, there is no reason to have separate identical routines
EPSON_reset() STARC_reset() NEC_reset() DPU414_reset().
All four TERM_TABLEs can simply reference EPSON_reset().

> but the 
> combination 'draft' + 'large' is forbidden because it drives the 'test'
> command into an endless(?) loop.

I'd rather fix the bug than forbid an otherwise reasonable combination.
Anyhow, the bug seems to be more pervasive:
   set term dpu large normal
   set output 'test.dpu'
   load 'histograms.dem'
also goes into an infinite loop

Can you work out where/why the loop happens?

	Ethan

-- 
Ethan A Merritt