My intention is to reuse the SPI relay to program AVR MCUs from a
RC2014.

U didn't properly handle inserting on the last line and O's bounds
checks didn't make sense.

It's more descriptive this way. Also, I'll soon add a new HERESTART
config.

Driver configuration don't need their own words at runtime, we only
need to compile them as literals when compiling words.

Now that we have this "declaration blocks" pattern emerging, it
seems like a good idea to take advantage of this in drivers, both
for simplifying the xcomp unit and to make final binary slimmer.

Most of the time, this output would be hidden by the next screen
update, except when editing the last line.

Initially, I used the same letters as those used in the z80 ref
docs, but it makes the different assemblers harder to use than they
should. Having consistent "argtype" rules across assemblers should
help.

The stage binary is now there.

The C VM now runs the show.

Previously, recipes that began spitting binary contents before
loading block 282 would end up with VARIABLE code in their binary,
thus breaking them. We fix this by making this loading process
2-part.

Before lblnext is set, we need to use BJP, instead of JPnn, for the
jump to work in binaries with offsets.

Much faster!

This will soon replace the libz80 based "forth" and
"stage" executables. This is much, much faster.

I has removed it when I switched to Forth because it was emulating
the assembler version, but Michael updated it, so I relink it.

The JS VM part is so cool!

Having this information on the website is enough.

Shadowing core "I" is too messy. As soon as ed is loaded in memory,
nothing else that isn't "i-aware" can be loaded anymore.

I guess that's why "contexts" exist in Starting Forth, but adding
this concept just for allowing the shadowing of core words seems
overkill to me. Renaming I to i in ed seems better.

This was becoming heavy to manage.

ref #82

VE works! well, at this point, we can say that Collapse OS runs on
PC/AT. A little cleanup and docs writing and we're done!

It helps a bit with staging times.

On real hardware, there aren't always 2 heads...

instead of hardcoded drive 0.

That INT 13H logic was a bit tricky to implement...

read-only for now.

Also, fix (roll) which wasn't properly implemented.

It isn't used by low level boot code anymore, so it can go there.

Was previously referred to by name+find, which was wasteful.