Support of HP GROB format

Retro Computer Image Library

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#66 Support of HP GROB format

Milestone: None

Status: accepted

Owner: Piotr Fusik

Labels: None

Priority: 5

Updated: 2022-01-13

Created: 2022-01-02

Creator: Eugene Nine

Private: No

GROB (GRaphics OBject) are used for HP calculators such as the HP48 from the early 1990's.
Some details can be found here https://www.hpcalc.org/hp48/docs/programming/grobs.txt

and https://www.hpcalc.org/hp48/docs/faq/48faq-8.html#ss8.18

Discussion

Piotr Fusik - 2022-01-13

status: open --> accepted

assigned_to: Piotr Fusik

Group: -->
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Eugene Nine - 2022-01-13

Found some more information:
http://justsolve.archiveteam.org/wiki/GROB
http://justsolve.archiveteam.org/wiki/Farbfeld_Utilities
http://zzo38computer.org/fossil/farbfeld.ui/wiki

These Farbfeld Utilities can convert a grob to a ff and thennconvert an ff to something else like a png. So there is some code in the grobff to use an example

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Piotr Fusik - 2022-01-13

Implemented both the binary and ASCII variants.

Some files from http://cd.textfiles.com/blackphiles/PHILES/HP48_1/GROBS1.ZIP are problematic:

JELLYF.GRB doesn't contain the expected header

DOODLE.GRB and MONSTERS.GRB contain some extra header (title?) - I don't see spec for that

Last edit: Piotr Fusik 2022-01-13
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