[hatari-devel] New WinUAE CPU core and NatFeats

[Eero Tamminen <oak@xxxxxxxxxxxxxx>]

Hi,

 

Nicolas, I debugged the NatFeats problem a bit.

 

With the new WinUAE CPU core, Hatari NatFeats test code gets

stuck on the NatFeats detection opcode:

--------------------------------

> d $12970

$00012970 : clr.l d0

$00012972 : movea.l sp,a1

$00012974 : movea.l $0010.w,a0

$00012978 : move.l #$12990,$0010.w

$00012980 : pea $13212

$00012986 : subq.l #4,sp

$00012988 : DC.W $7300 98.70% (27863836, 223006312, 0)

$0001298a : tst.l d0

$0001298c : beq.s $12990

$0001298e : moveq #1,d0

$00012990 : movea.l a1,sp

$00012992 : move.l a0,$0010.w

$00012996 : rts

$00012998 : DC.W $7300

$0001299a : rts

$0001299c : DC.W $7301

--------------------------------

(This is code from tests/natfeats/*.s.)

 

Then there are instructions executed in the ROM (I guess those

are related to TOS interrupt handling, mouse etc), and some code

in lower addresses.

 

 

If I enable "m68k_incpc(2)" line you commented out from

OpCode_NatFeat_ID(), things proceed over the NatFeats detection

opcode, but breaks a bit later:

--------------------------------

GEMDOS 0x20 Super(0x0) at PC 0xFA002A

NF ID(0x132ae "NF_VERSION")

GEMDOS 0x20 Super(0x378A) at PC 0xFA002A

NF ID(0x13178 "NF_STDERR")

NF ID(0x13182 "NF_DEBUGGER")

ERROR: invalid NF ID -1 requested

NF ID(0x1318e "NF_FASTFORWARD")

ERROR: invalid NF ID -1 requested

Address error exception at 0x12a0e!

--------------------------------

 

With old UAE CPU core I get:

--------------------------------

GEMDOS 0x20 Super(0x0) at PC 0xFA002A

NF ID(0x132ae "NF_VERSION")

GEMDOS 0x20 Super(0x378A) at PC 0xFA002A

NF ID(0x13178 "NF_STDERR")

NF ID(0x13182 "NF_DEBUGGER")

NF ID(0x1318e "NF_FASTFORWARD")

NF_FASTFORWARD(1 -> 1)

...

--------------------------------

 

Besides not advancing over the opcode, is there a problem in illegal

opcode exception stack? ("invalid NF ID -1 requested" error comes

from doing NF_CALL with invalid ID, not by requesting ID with NF_ID.)

 

 

I'm running Hatari like this:

$ hatari --natfeats yes --conout 2 --debug-except all,autostart --trace gemdos,natfeats nf_ahcc.tos

 

nf_ahcc.tos is attached, it's built from Hatari sources.

 

 

- Eero

 

Attachment: nf_ahcc.tos
Description: Binary data