Date   : Mon, 25 Feb 2008 10:47:57 +1100
From   : msmcdoug@... (Mark McDougall)
Subject: BBC FPGA Boots to BASIC... almost...

Jonathan Graham Harston wrote:

> You could temporarily replace the VDU code with something like:
>  
> PHA:TAY:PHA:TXA:PHA
> TSX:LDA &103,A
> CMP #32:BCS P%+4:LDA #42
> LDY #0:STA (&D8),Y
> INC &D8:BNE P%+4:INC &D9
> PLA:TAX:PLA:TAY:PLA:RTS
>  
> This just pokes the characters into the MODE 7 screen. You could
> stick it at &C000 over the font, change &FFEE to JMP &C000. It
> would show if the VDU code is causing the problem. You'd get
> something like the following:
>  
> **BBC Computer 32K****BASIC****>hello***
> *Mistake**>PRINT fred****No such variabl
> e**>P."Hello"**Hello**>
>  

I think I'll take your suggestion Jonathan, and finish off the SAA5050 and 
give this a go... I'll keep you posted!

Thanks again!
Regards,

-- 
|              Mark McDougall                | "Electrical Engineers do it
|  <http://members.iinet.net.au/~msmcdoug>   |   with less resistance!"