Slow STFM blitter oddness

[PhilC]

Yeah that looks like the figures I usually get

[Cyprian]

I would say the TOS in STfm has slower blitting functions than in STe.
Bear in in mind STfm TOS has less space than STe's one - 192k vs 256k.
Atari did some optimisation in order to fit the TOS in 192k (like using LineF functions), which are not present in STe TOS. It could have an impact onto performance figures.

The BLiTTER should has exactly the same timing in ST and STe. The only difference is Mega STE, where due to cache, every blitter pass has additional bus mastering cycle.

[exxos]

@Cyprian We're talking about TOS206 on STFM ...

[exxos]

Numbers look ok since this mega 4 is running @ 32.04 instead of 32.08. Also numbers suck like your seeing if acc's and programs are in startup. This is with XBOOT only, no acc's.

So far then, only my board is "slow" I guess have to wait until someone can test a STFM with TOS206.

[PhilC]

Which board do you have exxos?

[exxos]

Which board do you have exxos?

70789 rev F2

[PaulJ]

@PaulJ Do you have a STFM you could run TOS206 and blitter on ?

Is it the MM9092 blitter ?

Yes its a MM9092 in the H4 and MEGA.

[Cyprian]

@Cyprian We're talking about TOS206 on STFM ...

ok,
can you do some tests?
I could provide necessary PRG files.

[exxos]

ok,
can you do some tests?
I could provide necessary PRG files.

Yes.

[czietz]

So far then, only my board is "slow" I guess have to wait until someone can test a STFM with TOS206.

So this is one of my STFms with TOS 2.06 and Blitter:

IMG_3969.JPG (592.34 KiB) Viewed 4329 times

No slowdown! (The 99% in one test can surely be attributed to measurement tolerances.)