Simple C64 basic programs can be converted quite easily to run on the P500 with a simple change to the SID's start address. No tempo changes are required as the C64 and P500 have the same clock speed. I also managed to convert the C64's "Master Composer" player to run on the B-series... almost. I'm sure it wouldn't take too much to get it to work on the P500.

What is also interesting about the P500 is that an entire bank of 64K memory can be dedicated to the VIC-II chip.

If you're looking for more P500 info check my CBM-II page... http://ca.geocities.com/sjgray@rogers.com/CBM/index.html

I have some new info on the B-series HP internal drives, and I just managed to aquire a board I mentioned - an adapter board that plugs onto the SFD-1001 motherboard and adds the second drive, basically making it into an 8250LP. Unfortunately the board is not working, but the guy I got it from has a working unit so hopefully it can be fixed.

Steve Gray

PS: My first post to cbm-hackers... although I've been reading for quite a while.



----- Original Message ----
> From: B Degnan <billdeg@degnanco.com>
> To: cbm-hackers@ling.gu.se
> Sent: Saturday, July 11, 2009 10:01:16 PM
> Subject: P500 Conversion from PAL to NTSC
> 
> I was able to convert my PAL P500 to NTSC using the directions found here:
> http://landover.no-ip.com/pet/forum/index.php?topic=196.0 and parts from a 
> broken C64.
> 
> Here is the boot screen:
> http://vintagecomputer.net/commodore/p500/thm_P500_NTSC_bootscreen.JPG
> 
> I have also been able to write simple music programs using the SID chip, which 
> appears to use the same memory location as the B Series, not the C64.  One has 
> to program a tempo 2X as fast as one would for the B.
> 
> This system is quite odd...128K RAM, SID chip, 1mhz, 40 column color display.
> 
> Bill
> 
> 
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