Date   : Fri, 08 May 2009 00:08:56 +0100
From   : mfirth@... (Michael Firth)
Subject: ReCo6502 now available

----- Original Message ----- 
From: "John Kortink" <kortink@...>
To: <bbc-micro@...>
Sent: Thursday, May 07, 2009 11:59 PM
Subject: Re: [BBC-Micro] ReCo6502 now available


>
> On Thu, 7 May 2009 22:59:46 +0100, "Michael Firth" <mfirth@...>
> wrote:
>
>>The latter is compatible with the old 6502 external 2nd processor,
>>but adds support for the Master RTC, and re-codes some of the maths
>>routines to make them faster.
>
> There's also the MOS 3.50 version. Are they one and the
> same ? I never used any version of Hi-BASIC on the Master,
> I just fire up Elite very occasionally.
>
No, the two are different. The former has a startup 'REPORT' of (c) 1987,
while the latter is (c) 1988.
The standalone Hi-BASIC will work on any Master or BBC system, as its just
an updated version of the old Hi-BASIC - i.e. it will relocate itself to 
&B800 if
started with *HIBASIC with a Co-Pro present, but won't do anything useful on
a standalone machine.

I think the 3.50 BASIC requires OS 3.50, as its a relocatable ROM, - the 
newer
MOS ROM re-writes the explicit JMP / JSR calls to work at the &B800 address,
rather than &8000 which is its built-in start address.
This allows the same ROM to be used either as the standard BASIC, or as 
HiBASIC,
thus saving a ROM socket (assuming that HiBASIC is installed as a ROM, 
rather than
just started off disk)

>>Is there any update from WDC on when you are likely to get the
>>CPUs to allow you to start shipping the boards?
>
> No, most likely because I'm not asking. They said they'd
> inform me.
>
Fair enough.