[Coco] Proof-of-concept to make 16KB HDB-DOS ROMs seamlessly

[Bill Pierce]

Juan
I think there's a lot of room for expansion in HDBDOS if we go 16k (if that's what you're asking).
Support for 35/40/80trk DSDD drives, DW4 utilites (like the /N ports in NOS9), DW4 printing (patched to rsdos #-2 stuff), and I have a list of stuff that's usefull as I was working (at one time years ago) on expanding RSDOS as a patch. A lot of my ideas stemmed from various patches through the years from Rainbow and Hot Coco that I tacked on a patch program I used to run any time I turned on my Coco 2. When the Coco 3 came out, they used up a lot of the space I was using so I dropped it and moved on to OS9 L2.
Yes, there's a lot of things that could be done with another 8k :-)


Bill Pierce
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-----Original Message-----
From: Juan Castro <jccyc1965 at gmail.com>
To: CoCo List <coco at maltedmedia.com>
Sent: Thu, Jan 30, 2014 7:44 pm
Subject: [Coco] Proof-of-concept to make 16KB HDB-DOS ROMs seamlessly


I replicated the "two byte ASCII signature" scheme to allow for playing
with those unused top 8KB of ROM space. The example just puts an
exclamation point at the top right of the screen, but you can do anything.
Tell me what you think.

I made it so, if the top 8KB don't exist, it still works as before. I had
to condense a couple of messages. The makefile builds the normal 8K ROMs as
before, and also the 16K roms (prefix el-).

(This is a patch for the current source in Toolshed's Mercurial.)

https://dl.dropboxusercontent.com/u/15643089/hdbdos-16krom.patch

Juan

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