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-
-
- NTSC/PAL 1.0a
- BootNTSC/BootPAL 1.1 User Manual
-
- May 6, 1990
-
-
-
- Preface
- =======
-
- These programs are public domain, source code is included. You are free
- to use/change it as long as you leave my copyright notice intact. If you do
- make some nice improvements I'd like to hear about them, so please let me
- know. You can distribute these programs as long as you don't ask any more
- money for them than a nominal fee for copying, and if you keep this document
- with them. If you want to include these programs in a commercial product
- you need my written permission.
- The source is in assembler and is ready to be assembled by DevPac II.
- It should be no problem at all to get it to assemble under another assembler.
- If you have suggestions or remarks about these programs, or if you find
- any bugs, please let me know.
-
- Write to the following address:
-
- Nico François
- Corbielaan 13
- 3060 Bertem BELGIUM
-
-
- Contents
- ========
-
- 1. An introduction
-
- 2. Usage of BootPAL and BootNTSC
-
- 3. The NTSC and PAL utilities
-
- 4. ECS Agnus
-
-
- 1. An introduction
- ==================
-
- I am now the proud owner of a brand new A2000, I kicked out my A500 (It
- has served me well :-) and scraped all my money together to buy this great
- machine. But why am I telling you this ? Well, the new A500/A2000 has got
- the new ECS 1Mb Agnus installed. As most of you will know the main advantages
- of this chip is that it can access 1Mb of CHIP memory and that it can blit
- larger memory blocks (32Kx32K). But there is one other difference with the
- old agnus: the new agnus is the same in the PAL and NTSC machines. A
- question that leaps to mind is 'Can you switch between PAL and NTSC ???'. The
- answer is YES !!! At least, from PAL to NTSC is possible, the other way
- around I've not been able to check, but as long as your monitor can cope with
- it it should work ! I hope some NTSC users can confirm this. I've had one
- confirmation, but it was from somebody who used a NTSC Amiga in Germany, using
- a Commodore 1084S (PAL monitor) and a 50Hz power supply (Opposed to 60Hz in
- the USA and Canada). Therefore I am not absolutely sure it works on a "real"
- NTSC machine.
- The advantage to NTSC users should be obvious, the PAL display is much
- larger and gives a better quality picture. The advantage to PAL programmers
- is that they can test-run their programs on a real NTSC machine to see if
- they'll work. Another advantage is that you can play games in NTSC so they
- will fill the entire screen ! No more screen distortion ! And last but not
- least interlace flicker is less in NTSC than in PAL. (30 frames per second
- instead of 25 !)
- Source code is included and shows how to install resident programs in a
- clean way so you can install multiple resident utilities. Of course it also
- shows how to make your Agnus switch the Amiga from PAL to NTSC or vice versa,
- I think you will be surprised how easy it is :-D !
-
-
- 2. Usage of BootPAL and BootNTSC
- ================================
-
- BootNTSC/BootPAL can only be used from CLI, use it like this:
-
- PAL Amigas:
-
- '1> BootNTSC INSTALL'
-
- to install the NTSC romtag. The next time you reboot your machine will
- be an NTSC machine !! This works like a charm on my Commodore 1084S, I
- hope it works on other monitors as well.
-
- NTSC Amigas:
-
- '1> BootPAL INSTALL'
-
- This will install a PAL romtag. Reboot and keep your fingers crossed,
- your machine should boot up in PAL.
-
- To get your machine to behave normally again type:
-
- '1> BootNTSC REMOVE' (PAL) or '1> BootPAL REMOVE' (NTSC)
-
- and reboot.
-
- NOTE: - You *MUST* run the 'SetPatch r' command first !!! Otherwise these
- programs don't survive a reboot. This is normally the first
- command in your startup-sequence, so if you boot from your standard
- WorkBench there should be no problem.
- - Once installed the program will survive multiple reboots unless it is
- removed by memory corruption (like after a crash or after playing a
- game). This is only true if you run the 'SetPatch r' command each
- time you reboot !
- - It works just fine with the 1.3 RAD ramdisk. (Unlike other rebootable
- programs)
- - If you have Kickstart 2.0 installed you don't have to run the
- 'SetPatch r' command. Please note that these programs have NOT been
- tested under Kickstart 2.0.
-
-
- 3. The NTSC and PAL utilities
- =============================
-
- These two little programs are ideal to be put in the startup-sequence of
- games (and other programs ?). They will make your Amiga switch over to NTSC
- or PAL immediately. They will not change the size of the WorkBench screen,
- but they will make the Amiga think it is a PAL or NTSC machine from their
- execution on.
- Note that you will get very strange effects when you switch over to NTSC
- on a PAL Amiga with the WorkBench screen in front. This is because the
- WorkBench was opened on a PAL Amiga and will use a copperlist the NTSC Amiga
- won't understand. As far as I know this is completely harmless however.
- Use these little utilities like this:
-
- '1> NTSC' to switch PAL->NTSC '1> PAL' to switch NTSC->PAL
-
-
- 4. ECS Agnus
- ============
-
- The new Agnus chip is present in all the new Amigas (A500, A2000, A3000)
- or can be bought seperately and fitted yourself in your A500 (Rev 4+) or A2000
- (Rev B4.4+). (I am not absolutely sure about these numbers, check with your
- Amiga dealer). Fitting it is worth it, not only can you run this program :-),
- but you have 1Mb CHIP RAM and a more powerful blitter !
- If you fit the new agnus don't forget to change the 'SetPatch' command in
- your startup-sequence to 'SetPatch r' so these programs and RAD: will work.
-
-
- As always, I hope you find these programs useful !
-
-
- PROGRAM HISTORY:
-
- *****************************************************************************
- VERSION 1.0
-
- First release.
-
- *****************************************************************************
- VERSION 1.0a
-
- Small changes to the document. Programs only work when 'SetPatch r' is
- run first.
-
- *****************************************************************************
- VERSION 1.1
-
- I got a phonecall from someone to tell me the BootPAL program almost
- worked. Everything worked, except he lost part of the picture :-(
- This version of the programs patches some more things in GfxBase and I
- now think the programs should work fine on both PAL and NTSC machines.
- You no longer get strange effects when you drag the WorkBench screen on
- a PAL Amiga in NTSC mode (using BootNTSC).
-
- *****************************************************************************
-
- NTSC/PAL 1.0a
- BootNTSC/BootPAL 1.1 written by Nico François (Yes, Nico is my first name :-)
- thanks to Isaac Wyrobikwyrobnik (No, I can't pronounce
- it either, I just hope it is spelled correctly :-) for
- his bug report.
-
- (c) 1990 Nico François / PowerPeak
-
- //
- Thanks to \X/ Amiga for being the best computer ever !
-
-