Re: [hatari-devel] DSP and HREQ

[Laurent Sallafranque <laurent.sallafranque@xxxxxxx>]

oops ;)

For the DSP side, I propose :

HSR        equ    $ffe9    ;Host Status Register
HTX        equ    $ffeb    ;Host Transmit Register


    ; START
    org    p:$0
    jmp     $40

    org     p:$40

    ; General code to initialise port B
    movep    #>0,x:<<$fffe
    movep    #$c00,x:<<$ffff
    movep    #>1,x:<<$ffe0
    movep    #>3,x:<<$ffe8        ; enable interrupts
    andi    #$fc,mr

    jclr    #1,x:<<HSR,*
    move    a,x:HTX

tst_loop:
    jmp    tst_loop



I think I have to set %11 to $ffe8 to enable interrupts.
I'll test this under hatari first.






Le 26/01/2015 23:00, Nicolas Pomarède a écrit :
> Le 26/01/2015 22:48, Laurent Sallafranque a écrit :
> > I'm trying to do the test you're asking.
> > Is the cpu code OK for you ?
> > (I'm starting the DSP code now)
>
> Hi
>
> I think you copied/pasted twice, your asm part is doubled :)
>
> Apart from that I think it should work with the appropriate small 
> piece of dsp code to transmit 1 byte in the low dsp word and trigger 
> hreq at $ffa202.
>
> But I never really coded for the dsp, so you or some other people here 
> certainly know better than me :)
>
>
> Nicolas