Subj : Re: Closing a file in Assembly on the VIC-20
To   : Tilmann Hentze
From : Lawrence Woodman
Date : Thu Jun 17 2021 06:56 pm

On Thu, 17 Jun 2021 11:29:57 -0000 (UTC), Tilmann Hentze wrote:

> Lawrence Woodman <lorrywoodman@gmail.com> wrote:
>> I have created a piece of code which replicates the problem below if
>> anyone has any ideas where I'm going wrong I'd be very grateful.
>>
>> [code snipped]
>>
>> main
>>             lda  #$07         ; Length of file name
>>             ldx  #<filename   ; Low byte of file name location
>>             ldy  #>filename   ; High byte of file name location
>>             jsr  SETNAM       ; Set the name
>
>>             lda  #$08         ; Logical file number
>>             ldx  #$08         ; Device number
>>             ldy  #$01         ; Secondary address - $01 because saving
>>             jsr  SETLFS       ; Set above parameters
>
> I'd switch the two previous blocks around, so that you first set up the
> channel and then set the file name.

Thanks for the suggestion.  I gave it a go but unfortunately it still
gives the same result.


>> [code snipped]
>>             lda  #$08         ; Logical file number
>>             jsr  CLOSE        ; Close the file
>
> Looks good to me. Perhaps it will work with the first mentioned change?

Sadly not.  However, I'm not sure that a CLOSE is necessary as I noticed
in other code examples that it isn't used.  I've tried without it and
also checked for errors via a carry after the SAVE but still no joy. If
you or anyone else has any ideas I'd love to get this working.


Best wishes


Lorry

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