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!





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