[Coco] Just another peek...

[Dave Philipsen]

You can consider numbers 1 and 3 as effectively done already. As for fitting BOOT into 768 bytes or less I'm not 100% sure on that. It may be possible...

Dave Philipsen

> On Oct 10, 2015, at 6:16 AM, Brett Gordon <beretta42 at gmail.com> wrote:
> 
> In order to do stand-alone SD booting, the current OS9 two-stage boot
> does indeed require 3 drivers be written:
> 
> 1. One for HDBDOS/DECB
> 2. One for the boot loader (BOOT)
> 3. One for the Nitros9 run-time. (I guess someone did this already)
> 
> *Someone* here wrote a OS9 ROM booter effectively combines nos. 1 and
> 2 into one driver. (but leaves you without DECB), and requires one to
> monkey around with writing ROMs (which *is* pretty easy now-a-days)
> 
> The current Nitros9 BOOT implementation requires any new drivers to
> fit into 768 bytes of memory.  I'm guessing the SD driver would fit in
> there (even with the hideousness of the SDIO initialization code).
> 
> For writing any new driver, owning the subject hardware helps.  If I
> get the gumption to do all the crap needed to get a CoCoFPGA, I *may*
> help.  I've done the CoCoSDC drivers for HDBDOS.  And I don't think
> the BOOT driver is too difficult, considering the unholy union that
> BOOT/REL/KRN is. It's important to note though, because of our wacky
> "eat-your-own" and "nay-saying" that happens in this community, any
> coco programming I do now is for *myself*.  I will open-source it, of
> course, but if I take any crap, I will drop it like a plagued rat.
> 
> -- 
> Brett M. Gordon,
> beretta42 at gmail.com
> 
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