exxos's Atari, Amiga & retro forum

@frank.lukas TOS206 an TF536 works fine on its own.. it malfunctions when using MAPROM...

Got distracted with the ROM decoding https://www.exxosforum.co.uk/forum/viewt ... 413#p60413

But follow the red wire and the TF536 is now providing the ROM decoding output for the H4..


I guess I really need to solder a ROM socket on the TF536 to make sure it works as intended next :roll: @PhilC can try it :lol:

I just love the way you're supporting your scope :lol:

PhilC wrote: 26 Mar 2021 21:49 I just love the way you're supporting your scope :lol:

I know!! is only free real estate I have left :lol: :roll:

I am really wondering how long it will take for the toroidal transformer to wipe the floppy as well :lol:

So with some kind help from @Badwolf With the Verilog code.... I am now running this at 50Mhz! scores overall are fractionally slower than my 68000 50MHz booster, but that is likely as I cannot coax anymore speed out of the ROM like I could the ST.


TF536 50MHz..




68000 50Mhz.


Next to get TT RAM working...

Looking very promising :thumbup:

exxos wrote: 29 Mar 2021 10:04 So with some kind help from @Badwolf With the Verilog code.... I am now running this at 50Mhz! scores overall are fractionally slower than my 68000 50MHz booster, but that is likely as I cannot coax anymore speed out of the ROM like I could the ST.

Looks like your integer division is still a bit low, which probably accounts for half the speed difference. Should be 1.82 seconds for a 50MHz 030 with caches on.

Chip another couple of DTACK delays off! :D

BW

Badwolf wrote: 29 Mar 2021 10:55 Looks like your integer division is still a bit low, which probably accounts for half the speed difference. Should be 1.82 seconds for a 50MHz 030 with caches on.

I am not sure if it is or not, because speeds are double when GB6 is running from TTRAM... As the tests are running from ST-RAM it as the code overhead which is probably why slowdown is there...

I don't really have any reference to what it is supposed to be..

TTRAM is being a bit sulky for some reason... FASTRAM.PRG just freezes after saying the RAM is installed, GB6 can install it but then I get screen corruption... The RAM is present as I poked some addresses in STOS.. :shrug:


EDIT:


It looks like that odd address range corruption issue is back :roll: :shrug: I wonder if there's a bad connection somewhere...


TTRAM isn't behaving for some reason ..

exxos wrote: 29 Mar 2021 11:06

Badwolf wrote: 29 Mar 2021 10:55 Looks like your integer division is still a bit low, which probably accounts for half the speed difference. Should be 1.82 seconds for a 50MHz 030 with caches on.

I am not sure if it is or not, because speeds are double when GB6 is running from TTRAM... As the tests are running from ST-RAM it as the code overhead which is probably why slowdown is there...
I don't really have any reference to what it is supposed to be..

The integer division is consistent across ST-RAM and AltRAM.

You had 1.820 in this post with AltRAM, and here's my 50MHz 030 with ST-RAM only:

Bang on.

BW.