There is a copy of the cp/m 2.2 manual here

-----Original Message-----
From: [] On 
Behalf Of Chris Pile
Sent: 31 May 2014 21:01
Subject: Re: Pro-DOS v2.0 (CP/M 2.2) released

> On 31/05/2014 19:42, Tommo H wrote:
> I'm late to the party but congratulations from me!
Thank you!
>Now we can all more easily word process just like George R.R. Martin.
I think I'd still sooner user a PC these days!  ;-)
> Presumably you've got, or once had, some real, physical documents?
The original version of Pro-DOS was written before the large amount of 
reference material now available on the 'net.  Back in 1991 my local reference 
library had a copy of the original CP/M 2.2 user manual, so I photocopied the 
"System Interface" section and used those photocopies as my reference material. 
It was all I had to go on at the time.  I no longer have those photocopied 
sheets.  Today there is far more CP/M reference material available, including 
the original CP/M 2.2 user manual as a .PDF.  As with *all* of the programs I 
have ever written it was all trial and error really!  Certainly no formal 
methods and no real planning.  I just wrote the code as I went along.  
Something I've always done and still do!
One website I found useful for technical reference was:
Perhaps the biggest difference between doing this rewrite and writing the 
original back in 1991 was the availability of CP/M programs with which to 
perform system testing.  Back in '91 I relied on CP/M test programs collected 
by Wayne Weedon, with many of those arriving on floppy disks from software 
libraries in the US.  For this rewrite I had access to the huge "OAK" and 
"WALNUT CREEK" archive CDs which are both freely available on-line.  These gave 
me much more scope for CP/M 2.2 compatibility testing.
It might be worth remembering that Pro-DOS isn't actually CP/M 2.2 but rather 
my interpretation of it.
For example, it doesn't have separate BIOS/BDOS sections like "real" CP/M and 
is pretty much all one
large(ish) program.
These days I imagine it would be far simpler to take the original CP/M 2.2 and 
get that running on the SAM.  But "cheating" by using other people's code has 
never been for me.  Perhaps I'm a masochist!
In the future I'll be sticking to games.  Far simpler, and no need to write a 
user manual either!  ;-)

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