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1987-04-21
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Nimbus .PCX to Atari .PI1 files
[ ver 1.2 ] - 21/5/94
NIM2ST .TOS
NIM2ST .DOC
DEMO .PCX
ST2NIM .TOS
To set the scene, the Research Machines
Nimbus computers are widely used in
schools, including my one. It became
desirable for me to be able to look at
students' work at home, though there
was no way I would buy a Nimbus for the
purpose - the ST was good enough.
Various Public Domain programs were
acquired, tried and abandoned - Nimbus
formats are (um!) strange!
In desperation then, I wrote my own,
initially in Hisoft Basic and later
in 'C', with frills added.
This program works on files created
in 'PC Paintbrush' running on the
Nimbus-186 computers (TN, PC1, etc.)
which have a resolution of 320x250
in sixteen colours. These values seem
to be fixed, so no provision was made
for selecting different values.
Because of resolution differences, 50
lines of the Nimbus picture will be
lost in the conversion, and the user
is offered the option of selecting how
many will be lost from the top of the
picture, the remainder (from 50) being
lost at the bottom.
The discovery of 'Full Screen Creator'
(Goodmans GD1414) gave the option of
actually displaying the full Nimbus
picture if desired, so provision was
made to produce screens usable by this
program. As it involves cutting blocks
from Degas screens, either a black or a
white surround may be selected, to make
it easier to identify edges of the
required blocks.
Created on an Atari STFM running 1.02,
the program will probably fall flat on
its face on any other machine (Murphy's
Law), so herewith standard disclaimer
- I can accept no responsibility for
ANYTHING this program does - it was
cobbled together for a specific task
and is being made available for use by
anyone else who may feel the need.
As the program continually accesses the
disk while in operation, it is best run
on a ram-disk, and in medium resolution
if you want to see the prompts.
The way it works is to prompt for an
output format, and then a '.PCX'
filename which it renames by tagging
an 'a' or 'a','b','c','d' onto the end,
depending on selected output. For this
reason, '.PCX' files should be renamed
to have 7 or less letters to leave room
for this extension.
Instructions:
1. rename file to 7-letter filename;
2. start NIM2ST.TOS
3. select option;
3. type in filename - ending with '.'
Good luck!
Denis J. McCarthy
21/5/94
ST2NIM .TOS
While assessing some of the more
ambitious attempts at artistic design
on the Nimbus, it seemed desirable to
be able to offer alternative ideas in
the form of pictures developed on the
ST, so I decided to develop a further
converter - ST-to-Nimbus. This was a
mistake, but I managed it eventually!
This assumes the use of the Nimbus
palette of colours in the Degas .PI1
picture, as it wasn't worth the work
to try and do colour matching when
Degas would do it for me; i.e. load
a converted Nimbus picture, then load
the Degas picture as an image and say
'yes' to the 'remap colours' option.
Save file as uncompressed.
Denis J. McCarthy
21/5/94