OK, here's a text version. The xls contains the formulas for working out the frequencies and frame rates. How about an open format like ODS, will that do? http://inchocks.co.uk/commodore/PET/PET_CRTC.csv Rob On 27/04/2014 17:00, William Levak wrote: > > > I can't read xls. Can you print it to a text file? > > > On Sat, 26 Apr 2014, Rob Clarke wrote: > >> Hi William, >> >> I collected all the CRTC values from known ROM's into a spreadsheet, >> you can find it here. >> >> http://inchocks.co.uk/commodore/PET/PET_CRTC.xls >> >> The one in the first column is row 8 on the sheet, which also gives >> you a 50hz display but as you say, with slightly adjusted geometry. >> >> Rob >> >> On 26/04/2014 07:13, William Levak wrote: >>> >>> On zimmers.net under PET firmware there 3 separate images for the >>> 901474-04 50Hz screen editor ROM. I have compared them and found >>> only a few differences. The affected region is listed below. The >>> three columns below are the three different ROMs in the same order >>> they are listed on zimmers.net. >>> >>> $E787 is the ROM checksum. >>> >>> The other data almost looks like random garbage, but it has a >>> pattern. It took me a while to remember where I had seen that >>> pattern. They are the register values for the CRTC. >>> >>> According to my CRTC notes, the last column is values for an >>> external PAL monitor. The middle column is values for a 50 Hz >>> internal monitor. >>> I don't recognize the values in the first column. They are almost >>> like the 60 Hz internal monitor, but the vertical spacing is different. >>> >>> >>> E72A: 31 32 3F >>> E72B: 28 28 28 >>> E72C: 29 28 32 >>> E72D: 0F 08 08 >>> E72E: 27 26 20 >>> E72F: 00 02 10 >>> E730: 19 19 19 >>> E731: 20 20 1D >>> E732: 00 00 00 >>> E733: 09 09 08 >>> E734: 00 00 00 >>> E735: 00 00 00 >>> E736: 10 10 10 >>> E737: 00 00 00 >>> E738: 00 00 00 >>> E739: 00 00 00 >>> E73A: 00 00 00 >>> E73B: 00 00 00 >>> >>> E73C: 31 32 3F >>> E73D: 28 28 28 >>> E73E: 29 28 32 >>> E73F: 0F 08 08 >>> E740: 31 30 24 >>> E741: 00 00 11 >>> E742: 19 19 19 >>> E743: 25 25 20 >>> E744: 00 00 00 >>> E745: 07 07 07 >>> E746: 00 00 00 >>> E747: 00 00 00 >>> E748: 10 10 10 >>> E749: 00 00 00 >>> E74A: 00 00 00 >>> E74B: 00 00 00 >>> E74C: 00 00 00 >>> E74D: 00 00 00 >>> >>> E787: BF CD BF >>> >>> >>> >>> wlevak@sdf.lonestar.org >>> SDF Public Access UNIX System - http://sdf.lonestar.org >>> >>> Message was sent through the cbm-hackers mailing list >> >> >> Message was sent through the cbm-hackers mailing list >> > > wlevak@sdf.lonestar.org > SDF Public Access UNIX System - http://sdf.lonestar.org > > Message was sent through the cbm-hackers mailing list Message was sent through the cbm-hackers mailing listReceived on 2014-04-27 16:03:13
Archive generated by hypermail 2.2.0.