home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Frozen Fish 1: Amiga
/
FrozenFish-Apr94.iso
/
bbs
/
alib
/
d5xx
/
d575
/
amigatontsc.lha
/
AmigaToNTSC
/
AmigaToNTSC.doc
< prev
next >
Wrap
Text File
|
1991-12-22
|
4KB
|
126 lines
AmigaToNTSC - AmigaToPAL 1.0
User Manual
Nov 17, 1991
Preface
=======
The programs and files in this distribution are freely distributable, but
are also copyright (c) Nico François. They may be freely distributed as long
as no more than a nominal fee is charged to cover time and copying costs.
No commercial usage is permitted without written permission from the
author. Everything in this distribution must be kept together, in original
unmodified form.
The above is generally known as freeware.
If you have suggestions or remarks about this program, or if you find
any bugs, please let me know.
Write to the following address:
Nico François
Corbielaan 13
B-3060 Bertem
BELGIUM
AmigaToNTSC and AmigaToPAL require Kickstart 2.0 to run!
Contents
========
1. An introduction
2. Usage
3. Known problems
1. An introduction
==================
These two programs were written mainly for PAL users who are tired of
"flickering" 50Hz displays. As most people know a 60Hz display looks much
more stable than a 50Hz display. Sadly enough, European users are stuck with
this 50Hz display. Or are they ?
Workbench 2.0 holds a preference editor to change the mode of the Workbench
screen. Provided he has a ECS Agnus (also called Big Agnus) installed in his
Amiga a PAL user can select an NTSC display mode for the Workbench. Great!
But what about the other screens. As soon as a custom screen opens the
refresh rate pops back to 50Hz, PAL. Shucks!
Time to check out AmigaToNTSC and AmigaToPAL. AmigaToNTSC will patch the
Graphics library so it will think you have an NTSC Amiga. AmigaToPAL will
patch it to think you have a PAL Amiga. Custom screens will open in the mode
you selected. Problem solved.
2. Usage
========
For PAL users who want a stable 60Hz display for all screens:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Use the ScreenMode editor to select NTSC:Hires or NTSC:Hires-Interlace
display mode for the Workbench screen (make sure the 'NTSC' monitor is dragged
into your Monitors drawer). Then drag 'AmigaToNTSC' into your WbStartup
drawer. If you now restart your Amiga it will behave like an NTSC machine.
Switching temporarily back to PAL can be achieved by running AmigaToPAL.
For NTSC users who want a 50Hz display:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The AmigaToPAL program is useful for NTSC users who whish to run programs
which require a PAL screen. They should simply run AmigaToPAL before running
one of these programs.
NTSC users can of course also follow the procedure decribed for PAL users
above, with PAL and NTSC switched. But I can't think why they should wish to
do so.
3. Known problems
=================
- SysInfo gives wrong results when run on a PAL Amiga patched with
AmigaToNTSC. The machine is considered slower than it is. It seems that
SysInfo times using the vertical blank and expects a 50Hz refresh rate.
- Because this program patches GfxBase it may not be compatible with future
versions of AmigaDOS (Kickstart 3.0 ? :-).
- You can only reliably save a setting in the ScreenMode preference editor
if your Amiga is _NOT_ patched. So if you want to save a new ScreenMode
setting run AmigaToPAL first if you have a PAL machine, AmigaToNTSC if you
have an NTSC machine. Failing to do so will result in a wrong setting
being saved.
As always, I hope you find these programs useful!
PROGRAM HISTORY:
*****************************************************************************
VERSION 1.0
First release.
*****************************************************************************
AmigaToNTSC - AmigaToPAL 1.0 written by Nico François
(Yes, Nico is my first name :-)
"That man is a liar" - The Pixies
(c) 1991 Nico François
//
Thanks to \X/ Amiga for being the best computer ever !