In article <[log in to unmask]> [log in to unmask] (Jerry
Walsh) writes:
>Path:
>altitude!Rezonet.net!newsjunkie.ans.net!howland.reston.ans.net!ix.netcom.com!n
et
>news
>From: [log in to unmask] (Jerry Walsh)
>Newsgroups: comp.sys.hp.mpe
>Subject: Re: REPOST: PC Output to a HP2566C?
>Date: 18 May 1995 15:06:12 GMT
>Organization: Netcom
>Lines: 52
>Distribution: world
>Message-ID: <[log in to unmask]>
>References: <H0000066001c090b@MHS>
>NNTP-Posting-Host: ix-mvo-ca1-30.ix.netcom.com
 
 
>In <H0000066001c090b@MHS> Isaac Blake <[log in to unmask]>
>writes:
>>
>>This is a shot in the dark...  First why do you need to use a 2566???
>Do you
>>have special forms requirements which require an impact printer vs a
>laser
>>printer???  Also these printers are getting close to the end of their
>support
>>cycle, and cost a fair amount for support/maintenance.
>>
>>I've seen HP-IB cards for PC's, but for quite some time.  The last
>"PC" which
>>supported HP-IB I think was the HP150.  You definately do *NOT* want
>to use a
>>serial port because it won't be able to drive the printer to it's
>fullest
>>capacity.
>>
>>Here's some old math (and I can be wrong on this!!!):
>>
>>900LPM * 80 = 72,000 CPM (characters per minute) * 60 = 4,320,000 CPS
>>                                              SB / 60
>>That's the number of characters per second your printer might print.
>>
>>Now baud rate, such as 115.2K (maximum for a 16650 UART) represents
>bits per
>>second, so to convert it to bytes divide by 10.  So a serial port on a
>PC with
>>the latest UART can communicate 11,520 characters per second.
>>
>>So unless my math is off, that makes the printer 375 times faster than
>what the
>>PC can send over a serial port to the printer.  Hense you can see why
>laser
>>printers use the parallel interface.
>>
>>Of course a few weeks ago I was helping my wife with some advanced
>college math,
>>and it was a real challenge getting the cobwebs out!!!  :-)
>>
>>/isaac
 
 
> Try 1200 characters per second, also this printer may slow down
>further it switched into 132 column mode.
 
 
>Jerry Walsh
 
Excuse my Ignorance, but HP DOES have a parallel interface for the 2566C
printer. I know because I sell them. If he REALLY must put the 2566C on a PC,
the parallel interface would work.
 
Regards,
 
EFE Quebec
Mark E. Fabian