That patch seems to do the trick!

I tested it on top of r1450 with ATtiny1614 and JTAGICE3 (UPDI). I confirmed 
both reading and writing the flash works.

Sven

> On 25 Jun 2021, at 06:51, Joerg Wunsch <invalid.nore...@gnu.org> wrote:
> 
> Update of bug #60753 (project avrdude):
> 
>                  Status:                    None => Confirmed              
>             Assigned to:                    None => joerg_wunsch           
> 
>    _______________________________________________________
> 
> Follow-up Comment #2:
> 
> I suggest comparing against mem->page_size > 1 instead, since this is
> basically identical in behaviour to the pre-#1436 behaviour.
> 
> Also, there are more occasions than just line 364.
> 
> Please test the following patch.
> 
> +++
> Index: avr.c
> ===================================================================
> --- avr.c       (revision 1450)
> +++ avr.c       (working copy)
> @@ -330,7 +330,7 @@
>   memset(mem->buf, 0xff, mem->size);
> 
>   /* supports "paged load" thru post-increment */
> -  if ((p->flags & AVRPART_HAS_TPI) && mem->page_size != 0 &&
> +  if ((p->flags & AVRPART_HAS_TPI) && mem->page_size > 1 &&
>       pgm->cmd_tpi != NULL) {
> 
>     while (avr_tpi_poll_nvmbsy(pgm));
> @@ -361,7 +361,7 @@
>     return avr_mem_hiaddr(mem);
>   }
> 
> -  if (pgm->paged_load != NULL && mem->page_size != 0) {
> +  if (pgm->paged_load != NULL && mem->page_size > 1) {
>     /*
>      * the programmer supports a paged mode read
>      */
> @@ -863,7 +863,7 @@
>   }
> 
> 
> -  if ((p->flags & AVRPART_HAS_TPI) && m->page_size != 0 &&
> +  if ((p->flags & AVRPART_HAS_TPI) && m->page_size > 1 &&
>       pgm->cmd_tpi != NULL) {
> 
>     while (avr_tpi_poll_nvmbsy(pgm));
> @@ -903,7 +903,7 @@
>     return i;
>   }
> 
> -  if (pgm->paged_write != NULL && m->page_size != 0) {
> +  if (pgm->paged_write != NULL && m->page_size > 1) {
>     /*
>      * the programmer supports a paged mode write
>      */
> ---
> 
>    _______________________________________________________
> 
> Reply to this item at:
> 
>  <https://savannah.nongnu.org/bugs/?60753>
> 
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