GROB

From Just Solve the File Format Problem
(Difference between revisions)
Jump to: navigation, search
(Identification)
Line 18: Line 18:
  
 
== Software ==
 
== Software ==
 +
* [[Konvertor]]
 
* [[XnView]]
 
* [[XnView]]
 
* [http://ftp.funet.fi/index/misc/hp48sx/graphics/grob.to.bitmap grob.to.bitmap]
 
* [http://ftp.funet.fi/index/misc/hp48sx/graphics/grob.to.bitmap grob.to.bitmap]

Revision as of 15:19, 22 February 2016

File Format
Name GROB
Ontology
Extension(s) .grb, .gro, others
Released ~1990

GROB is a bi-level raster graphics format associated with HP-48 and HP-49 series calculators.

There are two ways to encode a GROB image: "binary" and "ASCII". Sometimes, GROB images are also ASC-encoded.

Contents

Format

Binary format has an 18-byte header, followed by the pixel data.

Identification

A binary GROB file begins with "HPHP48" or "HPHP49", and has bytes 1E 2B at offset 8.

ASCII format apparently begins with "GROB ". An ASCII GROB might be embedded inside a script, or preceded by a "%%HP" header line, so it won't necessarily start at the beginning of the file.

Software

Sample files

Binary

ASCII

Personal tools
Namespaces

Variants
Actions
Navigation
Toolbox