Date   : Thu, 23 Oct 2008 13:56:24 -0500
From   : jules.richardson99@... (Jules Richardson)
Subject: A500 development ROMs

Pete Turnbull wrote:
> On 23/10/2008 18:28, Mike Tomlinson wrote:
>> In article <081023005502@...>, Jonathan Graham Harston
>> <jgh@...> writes
>>
>>> Has anybody every come across the A500 development ROMs?
>> Do you mean Arthur, the predecessor of RISC OS?  IIRC, it was written in
>> Basic.
> 
> Arthur wasn't written in BASIC, it was written partly in ARM assembler 
> and partly in Modula-2 (and maybe some C).

I believe I have the source to Arthur somewhere with me - I'll try and find it 
and confirm later, but as I recall it was just m2 and assembler (I don't 
remember seeing any C). Acorn seemed to be going through a real m2 phase about 
that point (I think ARX and Panos are both heavily m2-based, too)

>  Arthur was not the OS on the A500 development systesm, either.

I still suspect it was just Brazil in ROM, and from there you could load 
whatever you wanted from disk - be it Arthur or something else entirely.

I have install media for Arthur r3 (and also supplement 1) - but it doesn't 
say which system. Whether it was designed to be ROM-resident is another matter.

cheers

Jules