SuperBrain Disks

Hi everybody, I've had delivery turned off for a long time - seems I'm no longer subscribed as my password does not work ... hopefully this will make it to the list, however I will not receive replies sent to the list except by checking the archives (which I don't do very often). I checked the archives today to see if a chap I had directed to the list got help with SuperBrain disks. I see several comments that I "should have them". I've never been able to read the diskettes from my original SuperBrain. I can read the first two tracks, then errors on every track - missing address marks. I cannot read them with ImageDisk nor TeleDisk. I've tried multiple different drives and types of drives - I simply cannot read the SuperBrain disks on anything except the SuperBrain. Every so often this comes up, and several people say "but SuperBrain disks are bog standard and easy to read" - so apparently I am the only one on the planet who can't read them. After explaining the above (that I simply cannot read them, and that I have in fact tried really hard) - I always get several offers to send me images or disks that can be read ... but nobody has every followed through, which is why I do not have SuperBrain disks on my site. I do have another system called a "CompuStar" which is a rebadged SuperBrain - and most of the disk from that system ARE readable on a PC ... BUT... the guy who owned it really liked APL, and created his own character generator ROM and custom BIOS to support APL characters on the machine ... All of his disks are "hand made" (not originals) and although his disks boot, they display incomprehensible garbage on a normal SuperBrain. Therefore I see little point in posting them as SuperBrain disks. I've only found one disk from his collection which boots and displays on the normal Brain - and it has the missing address mark problem. I've tried booting the Compustar disks on the SuperBrain and blind- formatting a disk --- but the created disk is still unreadable. I am assuming that the Z80 based disk controller in my SuperBrain makes disks which are not readable on a PC (the SB reads them fine). It can boot and read the CompuStar disks, however it does not appear to be able to format a readable disk. Unfortunately the Compustar is not currently working, and will need significant work to repair - so I cannot try formatting disks on it. And I am unable to create anything on the SuperBrain which I can read on the PC. Which is why I cannot provide disk images for the SuperBrain. I've tried - I simply cannot make it happen. Dave -- dave12 (at) Dave Dunfield dunfield Firmware development services & tools: www.dunfield.com (dot) com Classic computers: http://www.classiccmp.org/dunfield/