Re: [hatari-devel] Fast-boot option and SCSI

[Eero Tamminen <oak@xxxxxxxxxxxxxx>]

Hi,

On 8/31/20 12:28 AM, Eero Tamminen wrote:
> Thomas, there's place in tos.c where IDE & ACSI
> are checked, but SCSI isn't:
> https://git.tuxfamily.org/hatari/hatari.git/tree/src/tos.c#n758
>
> should that need a check for SCSI too?
>
> I also noticed that SCSI partition counts where
> not handled in all the places ACSI ones are.
>
> Attached patch(es) should fix these issues, but I
> was wondering, whether I should replace bAcsiEmuOn
> & bScsiEmuOn flags with a check for ACSI & SCSI
> partition counts?

Thomas, any comments?


> (I haven't tested the patch more than that it
> compiles, I'll do that after getting ACK for it
> otherwise.)

Hatari tosboot test round didn't show issues.


	- Eero

> On 8/30/20 9:01 PM, Uwe Seimet wrote:
> > Hi,
> >
> > Yes, TOS (at least an unpatched TOS) can only boot from the first IDE 
> > drive,
> > whereas it can boot from any ACSI and SCSI drive. The IDE drive is 
> > checked
> > for a bootable root sector first, followed by the 8 SCSI drives, 
> > followed by
> > the 8 ACSI drives. Of course, unpatched TOS versions can only boot from
> > those interface types (IDE, SCSI, ACSI) supported by the respective 
> > TOS. The
> > device type does not matter, i.e. TOS would also be able to boot from a
> > SCSI CD-ROM drive with 512 bytes per sector if this drive had the right
> > filesystem layout instead of ISO format. (Very old CD-ROM drives support
> > this sector size.)
> > TOS cannot boot from drives that have more than 512 physical bytes per
> > sector.
> >
> > Best regards
> >
> > Uwe
> >
> > > Hi,
> > >
> > > On 8/30/20 1:43 AM, Thomas Huth wrote:
> > > > Am Mon, 17 Aug 2020 13:03:01 +0300
> > > > schrieb Eero Tamminen <oak@xxxxxxxxxxxxxx>:
> > > > > While doing tos-boot Hatari tests for next EmuTOS release, I noticed
> > > > > a bug in Hatari.
> > > > >
> > > > > When using SCSI drive with "--fast-boot on" option, boot drive is A:,
> > > > > not C:.
> > > > >
> > > > > Thomas, because there can be multiple drives, and
> > > > > one doesn't necessarily use drive zero, is this
> > > > > correct fix, or should something more complicated
> > > > > be done:
> > > > > ----------------------------------------
> > > > > --- a/src/floppy.c
> > > > > +++ b/src/floppy.c
> > > > > @@ -174,7 +174,7 @@ void Floppy_GetBootDrive(void)
> > > > >            if (!ConfigureParams.HardDisk.bBootFromHardDisk)
> > > > >                    return;
> > > > >
> > > > > -       if (ACSI_EMU_ON || ConfigureParams.Ide[0].bUseDevice)
> > > > > +       if (ACSI_EMU_ON || ConfigureParams.Ide[0].bUseDevice ||
> > > > > ConfigureParams.Scsi[0].bUseDevice)
> > > > >            {
> > > > >                    nBootDrive = 2;  /* Drive C */
> > > > >            }
> > > > > ----------------------------------------
> > > > > ?
> > > >
> > > > I think you could boot from any SCSI disk, not only from the first one.
> > > > So it likely would be better to check all SCSI disks here.
> > >
> > > What about IDE, can one boot only from the first IDE drive?
> > >
> > >
> > >     - Eero