01 July 2020, 18:02 | #1 |
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Join Date: Aug 2009
Location: Waco USA
Posts: 253
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Bootstrapping an A2000?
From what I understand, the bootstrap of the A1000 was 256K of RAM & 64K ROM that would load the Kickstart from disk into the RAM, then boot into the loaded Kickstart. This seems handy for handling my multi-boot A2000. Keep the main Kickstart in one socket, then have the other socked attached to a bootstrap (so I can decide on 1.1, 1.2, or 1.3 depending on what I'm wanting to do.) Want to play Archon (for example,) just insert the KS1.1 or KS1.2 disk, hold down reset for 2 seconds (switches the ROM selector, gives me a tone when it triggers,) and then wait to swap in the Archon disk (which only runs on 1.1 or 1.2.)
So, has anyone, at any time, designed such an adapter for the A2000 (and A500, I guess,) ROM socket? Is it even possible? If push comes to shove, I'll just keep doing what I'm doing, and put in a degrader boot disk, then swap when needed. Pretty much the same thing, except it's loading more from the disk (full boot to startup-sequence, then running the degrader, finally loading the Kickstart and rebooting again.) |
01 July 2020, 18:11 | #2 |
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Join Date: Sep 2013
Location: CA/USA
Posts: 346
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There are of course ROM switchers for the kickstart. But there is also the ROMulator, which happens to be out of stock at the moment:
http://amigaonthelake.com/romulator-...miga-500-2000/ This allows you to select a kickstart at bootup. There is also this, DIY project: https://github.com/SukkoPera/OpenKickstartSwitcher I realize it is not quite what you are asking about but both of these solutions work well. Well, I know the ROMulator works because I have one. I have boards for the kickstart switcher project but havent built one yet. |
09 July 2020, 11:17 | #3 |
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Join Date: Oct 2017
Location: Germany
Posts: 193
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Here is another option. I've created Flash Based KS switcher where you can download an image with a small tool. Not as "comfortable" as others, but it works for my applications;
https://github.com/PR77/68000_Relocator_FLASH_Kickstart I've actually been wanting to try with the A1000 Kickstart to see if that works. Another project to add to the stack. |
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