I have been playing with Tom's XTALL software as filed in Tony's XTALL daughter board section.
Version 2.4 is like V2.1. The register data is a bit different. To edit the registers in Winpic it would help to make a screenshot, print it out and mark each group of six hex numbers (and the associated banks for V2.5.) Version 2.5b works well. All but one adjustment is within 30Hz of an even frequency. With my Si570 Bank 0/0 is 3.518533MHz. I see this is not adjusted. Bank4/4 is 7.26MHz, 4/5 is 7.28MHz, Banks 4/6 and 4/7 are also 7.28MHz but I realise this is intentional as amateur bands are covered up to 7.3MHz. I am wondering how this can be edited to personalise the frequency selection? Once the PIC has been run do we replace the data with that calculated for the actual Si570 in use? The program reads the chip and puts its startup registers at the very end of the data. I presume the a,c, and d versions will be posted sometime. I am using a binary switch to set the memories and a push button for the high order switch. This makes it a little easier to set banks and change frequency although I think most would need a chart to know where they are! Many thanks, well done Tom and Tony, if we don't get any free Si570s Si Labs should give YOU some! 73 Alan G4ZFQ (I asked them for a couple of high frequency ones before Tom said how much they were!)
