David, How did you assemble this a particular image? Do you start with a blank CF and use the dummy file and cpmtools to write a .dsk? I bet you have already tried another CF...
The problem with this is that I learned most of what I know from you and your example work, so if you are stuck you can be assured I am! Good luck, Thomas On Wednesday, June 25, 2014 3:04:22 PM UTC-4, David Fry wrote: > > Hi Thomas, > > It is only the last couple of weeks that have seen me getting the system > this far, if you remember I stalled moving forward whilst waiting for a > real time clock facility. > > Anyway, looks like it may be software and not hardware, > > For your own interest see the screenshot below > > from the issuing of the command pip a:test.com=a:get.com we can see the > following sectors accessed > > 1) LBA 41H is read (directory) to locate the program pip.com (first green > box) - CORRECT > 2) pip.com is read into memory LBA 1F0H to 200H - CORRECT > 3) pip.com then issues a directory read LBA 40H to find the sectors > relating to get.com - CORRECT > 4) get.com read into buffer LBA 148H to 154H -CORRECT > 5) pip.com reads the directory sector 44H into memory to add a directory > entry, this is correct , last sector with entries in. > 6) look like pip.com then writes the direcotry back to sector 44H (note > write command) - CORRECT > 7) then pip.com proceeds to write the buffer containing get.com into > sector 44H to 47H - *WRONG!!!* > > in fact with an emptier CF card image you can see that the directory entry > is created but it allocates the first AU as 01H so based on that it writing > to the correct location, question is why is it writing to AU 01H at all ?? > > 8) the following green boxed area is where CCP.COM is loaded back in > before the command prompt returns. > > Good Eh.... I'll let you know what it is when I track it down. > > > regards > > David Fry > > > On Wednesday, June 25, 2014 5:51:31 PM UTC+1, Thomas Owen wrote: > >> Hello a David, >> I wish I could help you but my system serial I/O is run from a Compupro >> system support 1 at 0D and 0C and I am not familiar with the propeller >> board at all. >> >> I do tend to agree, it sounds like a hardware issue, but with all the >> work you did leading up to this with other images, did you ever see a >> 'write' go like this? >> >> Good luck and let me know if I can help in any way. >> >> Thomas >> >> -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
