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mankeli
Registered: Oct 2010
Posts: 146 |
Spindle and Sparkle demos not launching
Can someone explain why demos using Sparkle or Spindle loaders can't be run from 1541U by selecting the launch file and using "mount & run"?
You got to use "Run Disk" for the whole image. 99.9999% of the C64 demos can be launched with mount & run, and somehow this only seems affect those aforementioned loaders. |
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tlr
Registered: Sep 2003
Posts: 1790 |
I suppose the $1c BAM flag could be used to skip the read BAM call if already done, but maybe it's not worth it. |
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Martin Piper
Registered: Nov 2007
Posts: 726 |
Quote: Quoting Martin PiperI remember now, it was the transwarp example that issues a M-E with the partial just loaded file in the read buffer: Transwarp V0.84 Yes, that's part of the 2-blocks bootstrap fastload strapped in front to speed up booting the actual loader.
Was 1-block in early dev versions, but that turned out to be too slow for my purposes. =)
(You can always fall back to loading Transwarp itself via ,8+RUN not ,8,1 when autorun won't work for some reason.)
As for the problems described here, i like the concept of a multi-loader coming in a self-contained package in C-64 memory, that would function just fine when run immediately after drive reset, new disk etc. :)
Then again, no particular love for non-stock aftermarket hardware.
After experimenting with making a smaller boot loader, I came up with this: https://github.com/martinpiper/C64Public/raw/refs/heads/master/..
This loads only $13 bytes at $316, it then executes code at $318, this then loads up to 256 bytes (in the same file) into $cf00-$cfff range.
In this example it loads code at $cfaf, which then just loads the next file. It could however do anything, like a M-E and then turbo load.
Code for the boot: https://github.com/martinpiper/C64Public/blob/master/IRQDisk/Sm.. |
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Burglar
Registered: Dec 2004
Posts: 1105 |
Quoting Martin PiperAfter experimenting with making a smaller boot loader, I came up with this: https://github.com/martinpiper/C64Public/raw/refs/heads/master/..
This loads only $13 bytes at $316, it then executes code at $318, this then loads up to 256 bytes (in the same file) into $cf00-$cfff range.
In this example it loads code at $cfaf, which then just loads the next file. It could however do anything, like a M-E and then turbo load.
Code for the boot: https://github.com/martinpiper/C64Public/blob/master/IRQDisk/Sm..
I'm afraid your autorun code does not work with my dolphindos setup, cpu jam $0008. so this is less compatible then the issue this thread is about.
I haven't tested more, but I wouldn't be surprised if this crashes on many other setups (with cartridge fastloaders) too. |
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Martin Piper
Registered: Nov 2007
Posts: 726 |
Quote: Quoting Martin PiperAfter experimenting with making a smaller boot loader, I came up with this: https://github.com/martinpiper/C64Public/raw/refs/heads/master/..
This loads only $13 bytes at $316, it then executes code at $318, this then loads up to 256 bytes (in the same file) into $cf00-$cfff range.
In this example it loads code at $cfaf, which then just loads the next file. It could however do anything, like a M-E and then turbo load.
Code for the boot: https://github.com/martinpiper/C64Public/blob/master/IRQDisk/Sm..
I'm afraid your autorun code does not work with my dolphindos setup, cpu jam $0008. so this is less compatible then the issue this thread is about.
I haven't tested more, but I wouldn't be surprised if this crashes on many other setups (with cartridge fastloaders) too.
I don't target incompatible extras :) |
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Burglar
Registered: Dec 2004
Posts: 1105 |
Quoting Martin PiperI don't target incompatible extras :) then you're in the wrong thread :) |
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Martin Piper
Registered: Nov 2007
Posts: 726 |
Just turn oof dolphin dos. Like you need to do for most other games anyway. |
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Bitbreaker
Registered: Oct 2002
Posts: 508 |
I guess this is the difference in bitfire's bootloader install, before uploading the loader with M-W/M-E and reading in the dir sector. I had faced those problems on Peiselulli's old 1541U too.
.install_bootstrap
jsr .open_w_15
lda #'i'
jsr .iecout
jsr .unlisten
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Fungus
Registered: Sep 2002
Posts: 691 |
Quote: Quoting Martin PiperI don't target incompatible extras :) then you're in the wrong thread :)
Yeah the thread is titled Spindle and Sparkle demos not launching. It is not titled use Martin Piper's crap because reasons. |
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hedning
Registered: Mar 2009
Posts: 4732 |
I don't really understand all of the tech stuff, but if it works on real hw, why is this an issue? It feels like it's something that the Ultimate guys should go for? |
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tlr
Registered: Sep 2003
Posts: 1790 |
Quote: I don't really understand all of the tech stuff, but if it works on real hw, why is this an issue? It feels like it's something that the Ultimate guys should go for?
It works in the most common use case, yes. If you reset/power cycle the drive after loading it doesn’t work. Although not required, wouldn’t be bad to be resilient against something like that at the cost of 3 bytes IMO. Consider it a feature request.
BTW, this whole discussion pointed me to some potential problems in my own drive code. |
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