Hallo Allemaal,



It has been a while since there was an update. During a long 'retro'

weekend Jens, BeRo and I had the chance to torture the C-One with

various demos, cartridges, test-programs and oscilloscopes. *)

The result (after some rework) you can now download as version 0.26



The following items have been fixed/updated:



- Reading from SID chip now implemented. (emulated registers removed)

- Fixed decimal mode of ARR instruction

- CPU speed changes together with the video mode if changed by

pressing F12.

- Fixed speed of dotclock and phi. System now runs at 0.9850Mhz for

PAL and 1.026Mhz for NTSC. Most floppy turbo loaders can now operate.

- VGA frame refresh rate now correct at 50Hz and 60Hz.

- Catridge port stability improved by adding data register that

buffers on read.





As you can see many activities have been focused on getting the system

speed correct. Until now the C-One ran about 8% too fast. With this

update the system is within 0.5% of the real C64 speed allowing many

floppy speeders to operate.



The ARR opcode and SID reading fix should satisfy a few extra programs

out there.



Again sorry for the long delay between the last update. I was working

on other projects. I have only 2 hands, 1 brain and 1 kitchen table.





The download file 'fpga64_026.zip' is available on my homepage at

http://www.syntiac.com/c_one.html



or for a complete overview including older versions and test reports

see: http://www.syntiac.com/fpga64.html



Don't let the bits byte you,

Peter



*) No 8 bit home computers where damaged or harmed while developing

this core version!

Great news!  Can I get a volunteer to put these bits up on C-One.net?





From: Peter

Sent: Thursday, July 24, 2008 4:09 PM

To: cone_cores@yahoogroups.com

Subject: [cone_cores] FPGA64 version 0.26 released





Hallo Allemaal,



It has been a while since there was an update. During a long 'retro'

weekend Jens, BeRo and I had the chance to torture the C-One with

various demos, cartridges, test-programs and oscilloscopes. *)

The result (after some rework) you can now download as version 0.26



The following items have been fixed/updated:



- Reading from SID chip now implemented. (emulated registers removed)

- Fixed decimal mode of ARR instruction

- CPU speed changes together with the video mode if changed by

pressing F12.

- Fixed speed of dotclock and phi. System now runs at 0.9850Mhz for

PAL and 1.026Mhz for NTSC. Most floppy turbo loaders can now operate.

- VGA frame refresh rate now correct at 50Hz and 60Hz.

- Catridge port stability improved by adding data register that

buffers on read.



As you can see many activities have been focused on getting the system

speed correct. Until now the C-One ran about 8% too fast. With this

update the system is within 0.5% of the real C64 speed allowing many

floppy speeders to operate.



The ARR opcode and SID reading fix should satisfy a few extra programs

out there.



Again sorry for the long delay between the last update. I was working

on other projects. I have only 2 hands, 1 brain and 1 kitchen table.



The download file 'fpga64_026.zip' is available on my homepage at

http://www.syntiac.com/c_one.html



or for a complete overview including older versions and test reports

see: http://www.syntiac.com/fpga64.html



Don't let the bits byte you,

Peter



*) No 8 bit home computers where damaged or harmed while developing

this core version!











[Non-text portions of this message have been removed]

Hallo Peter,



thanks a lot for the new core.

Unfortunately this version seems to break compatibilty to some

vga monitors. :'(

On my Eizo F56 the picture looks rare dark and black & white(50&60Hz).

On the Sony 19" CRT the picture is  dark but more recognizeble than on

the Eizo.

On both crts the picture is out of center, much more than before.

Is there a way  to get the 0.25 video compatibility back ?



Grüße



Dirk













Peter schrieb:

>

> Hallo Allemaal,

>

> It has been a while since there was an update. During a long 'retro'

> weekend Jens, BeRo and I had the chance to torture the C-One with

> various demos, cartridges, test-programs and oscilloscopes. *)

> The result (after some rework) you can now download as version 0.26

>

> The following items have been fixed/updated:

>

> - Reading from SID chip now implemented. (emulated registers removed)

> - Fixed decimal mode of ARR instruction

> - CPU speed changes together with the video mode if changed by

> pressing F12.

> - Fixed speed of dotclock and phi. System now runs at 0.9850Mhz for

> PAL and 1.026Mhz for NTSC. Most floppy turbo loaders can now operate.

> - VGA frame refresh rate now correct at 50Hz and 60Hz.

> - Catridge port stability improved by adding data register that

> buffers on read.

>

> As you can see many activities have been focused on getting the system

> speed correct. Until now the C-One ran about 8% too fast. With this

> update the system is within 0.5% of the real C64 speed allowing many

> floppy speeders to operate.

>

> The ARR opcode and SID reading fix should satisfy a few extra programs

> out there.

>

> Again sorry for the long delay between the last update. I was working

> on other projects. I have only 2 hands, 1 brain and 1 kitchen table.

>

> The download file 'fpga64_026.zip' is available on my homepage at

> http://www.syntiac.com/c_one.html <http://www.syntiac.com/c_one.html>

>

> or for a complete overview including older versions and test reports

> see: http://www.syntiac.com/fpga64.html

> <http://www.syntiac.com/fpga64.html>

>

> Don't let the bits byte you,

> Peter

>

> *) No 8 bit home computers where damaged or harmed while developing

> this core version!

>

>

At 16:57 25.07.2008 +0200, Dirk wrote:



>Is there a way  to get the 0.25 video compatibility back ?



That will be pretty much impossible, as the

monitor frequency is fairly closely tied to the

actual VIC timing. Since the whole computer is

now slowed down to the "real" frequency, the

video timing is also slower than before. We're

gaining compatibility with fastloaders, but we're

losing compatibility with monitors that don't

support 50Hz vertical refresh rate.



Jens Schönfeld

Hi Dirk,



To simulate the closer to correct clock frequencies I use different

clock dividers. These break the scandoubler developed by Tobias when

he initially ported my core to the c-one. (A long time ago in a galaxy

far far away)



So I have made a new one that is somewhat of a compromise to get both

a steady picture and allow fractional clock dividers for the CPU

(34.375 for PAL and 33 for NTSC). Simple scandoubling results in a

picture that looks like it is blended in a milkshaker. So I 'rescan'

the picture to a slightly different one, which might upset one or two

monitors 'out there'.



That said, it is not impossible to improve upon it, we just can't keep

using the simple scandoubler and support turbo loading at the same time.



As for your 'shift to the left bug', could you please test version

0.26a that is available at http://syntiac.com/fpga64.html

and tell me if it improves the picture quality for you?



Peter





--- In cone_cores@yahoogroups.com, Dirk Verwiebe <sp_rinter@...> wrote:

>

> Hallo Peter,

>

> thanks a lot for the new core.

> Unfortunately this version seems to break compatibilty to some

> vga monitors. :'(

> On my Eizo F56 the picture looks rare dark and black & white(50&60Hz).

> On the Sony 19" CRT the picture is  dark but more recognizeble than on

> the Eizo.

> On both crts the picture is out of center, much more than before.

> Is there a way  to get the 0.25 video compatibility back ?

>

> Grüße

>

> Dirk

>

>

>

>

>

>

> Peter schrieb:

> >

> > Hallo Allemaal,

> >

> > It has been a while since there was an update. During a long 'retro'

> > weekend Jens, BeRo and I had the chance to torture the C-One with

> > various demos, cartridges, test-programs and oscilloscopes. *)

> > The result (after some rework) you can now download as version 0.26

> >

> > The following items have been fixed/updated:

> >

> > - Reading from SID chip now implemented. (emulated registers removed)

> > - Fixed decimal mode of ARR instruction

> > - CPU speed changes together with the video mode if changed by

> > pressing F12.

> > - Fixed speed of dotclock and phi. System now runs at 0.9850Mhz for

> > PAL and 1.026Mhz for NTSC. Most floppy turbo loaders can now operate.

> > - VGA frame refresh rate now correct at 50Hz and 60Hz.

> > - Catridge port stability improved by adding data register that

> > buffers on read.

> >

> > As you can see many activities have been focused on getting the system

> > speed correct. Until now the C-One ran about 8% too fast. With this

> > update the system is within 0.5% of the real C64 speed allowing many

> > floppy speeders to operate.

> >

> > The ARR opcode and SID reading fix should satisfy a few extra programs

> > out there.

> >

> > Again sorry for the long delay between the last update. I was working

> > on other projects. I have only 2 hands, 1 brain and 1 kitchen table.

> >

> > The download file 'fpga64_026.zip' is available on my homepage at

> > http://www.syntiac.com/c_one.html <http://www.syntiac.com/c_one.html>

> >

> > or for a complete overview including older versions and test reports

> > see: http://www.syntiac.com/fpga64.html

> > <http://www.syntiac.com/fpga64.html>

> >

> > Don't let the bits byte you,

> > Peter

> >

> > *) No 8 bit home computers where damaged or harmed while developing

> > this core version!

> >

> >

>

Hi Peter,



just tried the 0.26a and it looks much better.Nearly similar to

older versions.

The picture is much brighter than in version 0.26 and on the Sony

it is more centered. Only a small black border on the right side.

On Eizo the picture is centered in 50 and 60 Hz mode but its a little

bit less sharp than on the sony crt.

Now i can play again with the c-one.

Thank you very much.



Viele Grüße



Dirk





Peter schrieb:

>

>

> Hi Dirk,

>

> To simulate the closer to correct clock frequencies I use different

> clock dividers. These break the scandoubler developed by Tobias when

> he initially ported my core to the c-one. (A long time ago in a galaxy

> far far away)

>

> So I have made a new one that is somewhat of a compromise to get both

> a steady picture and allow fractional clock dividers for the CPU

> (34.375 for PAL and 33 for NTSC). Simple scandoubling results in a

> picture that looks like it is blended in a milkshaker. So I 'rescan'

> the picture to a slightly different one, which might upset one or two

> monitors 'out there'.

>

> That said, it is not impossible to improve upon it, we just can't keep

> using the simple scandoubler and support turbo loading at the same time.

>

> As for your 'shift to the left bug', could you please test version

> 0.26a that is available at http://syntiac.com/fpga64.html

> <http://syntiac.com/fpga64.html>

> and tell me if it improves the picture quality for you?

>

> Peter

>

>

> --- In cone_cores@yahoogroups.com

> <mailto:cone_cores%40yahoogroups.com>, Dirk Verwiebe <sp_rinter@...>

> wrote:

> >

> > Hallo Peter,

> >

> > thanks a lot for the new core.

> > Unfortunately this version seems to break compatibilty to some

> > vga monitors. :'(

> > On my Eizo F56 the picture looks rare dark and black & white(50&60Hz).

> > On the Sony 19" CRT the picture is dark but more recognizeble than on

> > the Eizo.

> > On both crts the picture is out of center, much more than before.

> > Is there a way to get the 0.25 video compatibility back ?

> >

> > Grüße

> >

> > Dirk

> >

> >

> >

> >

> >

> >

> > Peter schrieb:

> > >

> > > Hallo Allemaal,

> > >

> > > It has been a while since there was an update. During a long 'retro'

> > > weekend Jens, BeRo and I had the chance to torture the C-One with

> > > various demos, cartridges, test-programs and oscilloscopes. *)

> > > The result (after some rework) you can now download as version 0.26

> > >

> > > The following items have been fixed/updated:

> > >

> > > - Reading from SID chip now implemented. (emulated registers removed)

> > > - Fixed decimal mode of ARR instruction

> > > - CPU speed changes together with the video mode if changed by

> > > pressing F12.

> > > - Fixed speed of dotclock and phi. System now runs at 0.9850Mhz for

> > > PAL and 1.026Mhz for NTSC. Most floppy turbo loaders can now operate.

> > > - VGA frame refresh rate now correct at 50Hz and 60Hz.

> > > - Catridge port stability improved by adding data register that

> > > buffers on read.

> > >

> > > As you can see many activities have been focused on getting the system

> > > speed correct. Until now the C-One ran about 8% too fast. With this

> > > update the system is within 0.5% of the real C64 speed allowing many

> > > floppy speeders to operate.

> > >

> > > The ARR opcode and SID reading fix should satisfy a few extra programs

> > > out there.

> > >

> > > Again sorry for the long delay between the last update. I was working

> > > on other projects. I have only 2 hands, 1 brain and 1 kitchen table.

> > >

> > > The download file 'fpga64_026.zip' is available on my homepage at

> > > http://www.syntiac.com/c_one.html

> <http://www.syntiac.com/c_one.html> <http://www.syntiac.com/c_one.html

> <http://www.syntiac.com/c_one.html>>

> > >

> > > or for a complete overview including older versions and test reports

> > > see: http://www.syntiac.com/fpga64.html

> <http://www.syntiac.com/fpga64.html>

> > > <http://www.syntiac.com/fpga64.html

> <http://www.syntiac.com/fpga64.html>>

> > >

> > > Don't let the bits byte you,

> > > Peter

> > >

> > > *) No 8 bit home computers where damaged or harmed while developing

> > > this core version!

> > >

> > >

> >

>

>

Hi Peter,

just to let you know: i had the same problem with a Belinea 17" TFT.

I installed 0.26a and have now a perfect bright screen.



best regards

retrofreak.



--- In cone_cores@yahoogroups.com, "Peter" <pwsoft@...> wrote:



> As for your 'shift to the left bug', could you please test version

> 0.26a that is available at http://syntiac.com/fpga64.html

> and tell me if it improves the picture quality for you?

>

> Peter