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alpine9000 2016-03-19 13:03:25 +11:00
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022.photons_bootloader/README.md
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Photon's bootloader
===================
In this example we take [020.shrinkler](../020.shrinkler) and convert it to use [Photon's bootloader](http://coppershade.org/asmskool/SOURCES/Photon-snippets/DDE5-BootLoader.S).
I hacked the [boot loader code](../shared/hardware_bootloader.s) just a little bit. Firstly I think some of the vasm optimisations messed with some of the code offsets that are assumed by Photon's code. Secondly I modified it to be compatible with my previous bootloader.
The bootblock code is in [../shared/hardware_bootblock.s](../shared/hardware_bootblock.s), and will be the default bootblock I use going forward.
A new [Makefile](Makefile) config option has been added:
```
USERSTACK_ADDRESS=7fffc
```
Luckily the bootloader and shrinkler code still fit in the bootblock :-)
try it
------
* [Download disk image](bin/shrinker.adf?raw=true)
* <a href="http://alpine9000.github.io/ScriptedAmigaEmulator/#amiga_examples/shrinkler.adf" target="_blank">Run in SAE</a>
* [Download disk image](bin/photons_bootloader.adf?raw=true)
* <a href="http://alpine9000.github.io/ScriptedAmigaEmulator/#amiga_examples/photons_bootloader.adf" target="_blank">Run in SAE</a>