Re: [hatari-devel] Starglider 1 doesn't work anymore with Hatari

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

Le 08/11/2012 00:30, Eero Tamminen a écrit :
> Hi,
>
> On keskiviikko 07 marraskuu 2012, Eero Tamminen wrote:
> > Starglider 1 on the attached image works
> > only with older Hatari v1.4.
>
> ...regardless of whether I use color or monochrome mode.
>
>
> The last OS calls it does before the titlescreen are:
> ---
> GEMDOS Fopen("title.tra", 0x0)
> BIOS Mediach()
> [..mediach..]
> BIOS Mediach()
> GEMDOS Fread(6, 32768, 0x70000)
> BIOS Mediach()
> BIOS Rwabs 0,0,0x840F6C0,1318,62
> BIOS Rwabs 0,0,0x83A4F50,8,1
> BIOS Rwabs 0,0,0x83A5350,1380,1
> GEMDOS Fclose(6)
> GEMDOS Fopen("result.tra", 0x0)
> BIOS Rwabs 0,0,0x83A4D50,11,1
> BIOS Mediach()
> [..mediach..]
> BIOS Mediach()
> GEMDOS Fread(6, 32768, 0x70000)
> BIOS Mediach()
> BIOS Rwabs 0,0,0x840F6C0,1382,62
> BIOS Rwabs 0,0,0x83A5150,1444,1
> GEMDOS Fclose(6)
> ---
>
> They are the same with latest Hatari,
> but Rwabs addresses differ a bit:
> ---
> GEMDOS 0x3D Fopen("title.tra", read-only)
> BIOS 0x09 Mediach(0x0)
> [..mediach..]
> BIOS 0x09 Mediach(0x0)
> GEMDOS 0x3F Fread(6, 32768, 0x70000)
> BIOS 0x09 Mediach(0x0)
> BIOS 0x04 Rwabs(0,0x8424520,62,1318,0)
> BIOS 0x04 Rwabs(0,0x83B9DB0,1,8,0)
> BIOS 0x04 Rwabs(0,0x83BA1B0,1,1380,0)
> GEMDOS 0x3E Fclose(6)
> GEMDOS 0x3D Fopen("result.tra", read-only)
> BIOS 0x04 Rwabs(0,0x83B9BB0,1,11,0)
> BIOS 0x09 Mediach(0x0)
> [..mediach..]
> BIOS 0x09 Mediach(0x0)
> GEMDOS 0x3F Fread(6, 32768, 0x70000)
> BIOS 0x09 Mediach(0x0)
> BIOS 0x04 Rwabs(0,0x8424520,62,1382,0)
> BIOS 0x04 Rwabs(0,0x83B9FB0,1,1444,0)
> GEMDOS 0x3E Fclose(6)
> ---
>
> And after that the game doesn't show title
> screen, but stops.
>
>
> 	- Eero


Hello

I gave a quick look yesterday, and the game tries to read sector 247 on 
track 79, this is not a gemdos issue.
I think the protection test is still made, except the result is 
discarded in the end, so the game starts anyway, even on a standard floppy.

Now I need to see what is wrong when the fdc code deals with unknown 
sector (hatari 1.4 was completly wrong on this part, but in this 
specific case, it worked  by luck)

Nicolas