[Info-vax] IPP utiltiy

[Mark Berryman]

On 5/5/21 1:49 PM, Louis Krupp wrote:
> On 5/5/2021 10:19 AM, Mark Berryman wrote:
>> On 5/4/21 2:49 PM, Simon Clubley wrote:
>>> On 2021-05-04, Mark Berryman <mark at theberrymans.com> wrote:
>>>> Based on feedback, it would appear that a number of the printers out
>>>> there are designed more for mobile printing than desktop printing. This
>>>> is indicated by the document formats they support.  Typically, such
>>>> printers return a supported document format list similar to the 
>>>> following:
>>>>
>>>> application/vnd.hp-PCL: this is HP?s Printer Control Language.  It is
>>>> text with escape sequences although binary data can be included when
>>>> graphics are involved.
>>>>
>>>
>>> Just for completion, there are multiple PCL versions around.
>>>
>>> Is there any indication of which PCL version(s) this covers ?
>>
>> Yes.  Each printer will have some attribute indicating which version 
>> of the various protocols it supports.  Mine, for example, claims PCL 6 
>> support.
>>
> 
> FWIW:
> 
> PCL 5, to my knowledge, is a superset of PCL 4, which is a superset of 
> PCL 3, and so on. PCL 6 (also known as PCL XL) is very different.
> 
> I haven't seen any glaring inaccuracies in the Wikipedia entry:
> 
> https://en.wikipedia.org/wiki/Printer_Command_Language#PCL_levels_1_through_5_overview 
> 
> 
> (I worked on embedded PCL 5 and PCL 6 interpreters about twenty years ago.)

As far as I know, PCL 6 "enhanced" is PCL XL.  PCL 6 "standard", 
frequently written as simply PCL 6, is the same as PCL 5e (or PCL 5c if 
color).

As an example, my printer claims PCL 6, and has properly printed every 
PCL file I've thrown at it, most of which were PCL 3.

Mark Berryman