Re: [hatari-devel] Code execution on reset within the emulated Atari

[Thorsten Otto <admin@xxxxxxxxxxx>]

On Freitag, 19. Juli 2024 11:45:37 CEST Thomas Huth wrote:

> Is the "RESET" 68k CPU instruction called in that case?

Should be so (for TOS 3.06)

_os_entry:

[00e00000] 602e                      bra.s     _main

_main:

[00e00030] 46fc 2700                 move.w    #$2700,sr

[00e00034] 31fc 0100 8606            move.w    #$0100,(DMA_CTRL).w

[00e0003a] 31fc 0000 8606            move.w    #$0000,(DMA_CTRL).w

[00e00040] 4e70                      reset

For 2.06

_os_entry:

[00e00000] 602e                      bra.s     $00E00030

_main:

[00e00030] 46fc 2700                 move.w    #$2700,sr

[00e00034] 4e70                      reset

For 1.04:

_os_entry:

[00fc0000] 602e                      bra.s     $00FC0030

_main:

[00fc0030] 46fc 2700                 move.w    #$2700,sr

[00fc0034] 4e70                      reset

For EmuTOS:

os_entry:

    bra.s   _main       // branch to _main

_main:

        bra.w   _realmain   // MUST be 4 bytes long

_realmain:

  // some checking for valid memory confguration, then

not_falcon:

        // we are not on Falcon, a simple reset is enough

        reset