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 <
[email protected]> 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
---
Advanced Use of .LBR Files on CP/M
https://techtinkering.com/articles/advanced-use-of-lbr-files-on-cpm/
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