Re: [hatari-users] TOS 1.0 floppy bootrom

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

Le 18/03/2013 23:07, Thomas Huth a écrit :
>   Hi,
>
> Am Mon, 18 Mar 2013 20:03:10 +0100
> schrieb Vincent Rivière <vincent.riviere@xxxxxxxxxxx>:
>
> > On 18/03/2013 18:21, Nicolas Pomarède wrote:
> > > But can you move it latter ?
> >
> > Yes, inside emutos-floppy booted from that ROM, the mouse worked.
> >
> > > You could try to modify "IKBD_ROM_VERSION" in ikbd.c to see if it
> > > fixes the problem.
> >
> > I may try some day, but I'm just a user (here)...
>
> 0xf0 does not help ... but it works when I disable the sending of the
> "version number" completely. Looks like TOS 0.00 does not expect this
> byte. This could mean that the very early IKBDs did not send this
> code ... or, Nicolas, could it be that 0xf1 should not be sent after a
> hard reset, and only after a 0x80 0x01 reset command? TOS 0.00 does not
> send the 0x80 0x01 command as far as I can see, so maybe it should also
> not get the 0xf1?
>
>   Thomas

As far as I could see from disassembling the most common IKBD rom (the 
one from 520 STF, STE, ...), it always send F1 after a complete 
initialisation, whether it's a hard reboot (power on, 68000 RESET 
instruction) or a soft reboot using 0x80 0x01 command.

Maybe earlier ST with TOS 1.00 had a different IKBD ROM, but I was not 
able so far to find the dump of such IKBD ROM, so I can't really say.

The fact that tos 1.00 doesn't send $80 $01 command could be 
understandable, as after a reset the ikbd init itself alone anyway. 
Unless we have the ikbd rom, it's hard to be sure.

Nicolas