[Coco] R+DOS/16 WIP

[Juan Castro]

Today's fudging:

- An obscure problem with CaChars mode interfering with FlexiKey when you
disabled the cursor
- Some branch optimization
- This is not actually DOING anything, but I was able to test a DriveWire
build and PRINT#-2 works like with the previous version! I didn't break it!
Woo hoo!
- The make process now generates a file called slacks.txt with how many
bytes left one has to play in each ROM version. Have fun.

It's at the same links.
Source patch:
https://dl.dropboxusercontent.com/u/15643089/hdbdos-16krom-1.5-proposal.patch
16K ROMs: https://dl.dropboxusercontent.com/u/15643089/16kroms.zip

Juan Castro
Enviado do meu Olivetti Programma 101

On Sat, Apr 4, 2015 at 9:09 PM, Juan Castro <jccyc1965 at gmail.com> wrote:

> I tried to use a compiled-from-sources 16 KB LBA HDB-DOS ROM with my
> BASIC goodies in my MiniIDE, and got nothing. Then I remembered about
> the FF70 port thing, changed it to FF50 -- nopw I got gibberish from
> the disk instead of a lockup.
>
> I backtracked EVERY change in the ROM, one by one. At some point I
> even thought the recent TFSIDE patch was the culprit. After taking
> everything out (and burning some 20 EPROMs in the process). After much
> disappointment, I got to a difference of 3 bytes between my compiled
> ROM and the one that worked.
>
> Those bytes were 00 00 00 in my ROM, and 05 2D DC in the working ROM
> that came with the MiniIDE. Yeah. Hard-coded sector offset.
>
> Now I FINALLY have a 16K HDB-DOS derivative for the CoCo 1/2 with the
> BASIC enhancements I had before (except DW support) working on an IDE
> interface. It should work in a Glenside IDE or a SuperIDE if you can
> coax the hardware into seeing a 16K Disk ROM. Here's it:
>
> https://dl.dropboxusercontent.com/u/15643089/16k-hdblba.rom
>
> And below is the source patch. On its face, it's a less invasive patch
> -- it just creates 16k ROMs and leaves disk support as-is. I imagine
> ROM 16k-xxxxxx.rom should work pretty much as well as the plain 8k
> xxxxxx.rom, for every xxxxxx.
>
> https://dl.dropboxusercontent.com/u/15643089/16k-ide-rom.patch
>
> Next challenge is to reintroduce DW support into an IDE ROM as an
> add-on. That will be tricky, but, I imagine, less than introducing IDE
> support into a DW ROM.
>
> Also, I didn't hack my MiniIDE; I used an MPI.
>
> Juan Castro
> Enviado do meu Olivetti Programma 101
>