Re: System identification from Applesoft?

[Benoit0123 <bgilon@free.fr>]

gids.rs wrote:
> On Tuesday, February 12, 2013 7:48:14 PM UTC-6, Jayson Smith wrote:
>> Hi,
>> 
>> 
>> 
>> Are there any peeks, calls, etc. you can use to definitively identify
>> what
>> 
>> type of Apple is being used from Applesoft? In particular, I'm looking
>> for a
>> 
>> way to identify a GS from a non-GS.
>> 
>> Thanks.
>> 
>> Jayson
> 


> 
> 
> Here is a chart of ID bytes
> 
>              $FBB3     $FBC0     $FBBF
> System       64435     64448     64447 
> 
> Apple II     $38 (56)  $60 (96)  $2F (47)
> Apple II+    $EA (234) $EA (234  $EA (234)
> Apple IIe    $06       $EA       $C1 (193)
> Apple IIe+   $06       $E0       $00
> Apple IIc    $06       $00       $FF (255)
> Apple IIc+   $06       $00       $00
> Apple IIGS   $06       $E0 (224) $00
> 
> 
> 
> Rob
>
As the //e enhanced (IIe+) and IIgs share same signature, a further
filtering code is needed
;Y register = 2 upon entry...
 LDA $FC5C ;value $EB in IIGS ROM 
 CMP #$EB
 BNE :2 Exit with IIe+ ID
 LDY #8 Else IIGS
 CLC
 XCE Enter native 16its mode
 PHP
 REP $30 Set 16bits for X,Y and Acc, mem
 JSR $FE1F Call ID routine
 STY NEWY
 PLP
 XCE Restore emulation mode
 LDY #12
 LDA NEWY+1
 BNE :2 Exit with Y=12 if newer than //gs machine code
 LDA NEWY
 ORA #8 Exit with Y between 8 and 11 according to //gs ROM level
:2 RTS