[hatari-devel] HD6301 emu : news

[npomarede at corp.free.fr]

On Sat, 5 Sep 2009, Laurent Sallafranque wrote:

> Hello,
>
> Actually, I've nearly finished to implement the main CPU core.
> I still have to code :
> - the H bit in the CCR
> - sleep opcode
> - BCD opcode
> - ABA
>
> I've started unitary tests. It seems to work.
> I'll continue to stress the code to find bugs.
>
> Still to do :
> - add interrupts
> - add internal counters
> - add peripherals address code
> - interface the HD6301 into hatari.
>
> Regards,
>
> Laurent
>

Hello,

thanks for the work.

I guess for the interface with the keyboard you're using the articles that 
were published in french ST Magazine ? I think this will require some work 
and some tweaking to find the correct rate to run 6301 code to interface 
correctly with the serial port at fffc00/fffc02.

In the end, this will be really nice to have a real 6301 support.

Also, a 6301 disassembler that could be called from the debugger would be 
nice, to disassemble either the 6301 ROM or the RAM (I used an old program 
called 'dasmx' when I added fake 6301 support, but having this directly in 
Hatari would be better)

Just having a look at the code, I see the same code is used many times to 
compute the CCR flags, for example in asrb/aslb/rolb, or in 
anda_ind/bita_ind. I was wondering, perhaps it could be possible to use a 
macro or a generic CCR function to group a few common cases at the same 
place, thus not duplicating some nearly identical code ?


Nicolas