donw@pinot (Don White) (06/11/87)
[Do I have to do this? I don't beleive in line eaters.] I have been pouring over data books trying to find an 8520. No banana. The closest thing I have found is the MC6820/MCS6520 in Osbornes book, An Introduction to Microcomputers. The pinout is different. The pins and functions look close. The 6520/6820 is a PIA (Peripheral Interface Adapter). I can only assume that the 8520 is also. If anyone has data sheets for the 8520, please send me a copy. I am trying to get enough information to begin experimenting with devices hooked to the parrallel port. I have a copy of the Amiga schematics called Schematics and Expansion Specifications. (I appreciate Commodore making them available!!) The specifications outline the functions of the pins of the parallel connector,but I would like more nitty gritty about what I can do with the input and output of that port. Please? P.S. The schematics for the Amiga are titled ZORRO in the Schematics and Expansion Specifications manual. Was that the original name? Don White Box 271177 Concord CA. 94527-1177 zehntel!donw 372-9267 (answering machine)
hah@isum.intel.com (Hans Hansen) (06/12/87)
In article <157@zehntel.UUCP> donw@pinot (Don White) writes: > > I have been pouring over data books trying to find an 8520. > The 8520 is a modified 6526, found in the C64. Diffs: TOD clock is now just a timer. Interrupt mask fixed. Other small changes but for the most part it is a 6526. Hans
scott@applix.UUCP (06/15/87)
In article <2020@cbmvax.cbmvax.cbm.UUCP> carolyn@cbmvax.UUCP (Carolyn Scheppner CATS) writes: > We included the 8520 specs in the "Amiga Developer's Conference Notes" >which are available for $20 (check made out to Commodore Business Machines) Would it be possible for someone from CATS to list all the spec. packages available for $20? The only ones I now know of are this one, the Native Developers, and the IFF info. Everytime I write to order a new kit, I discover later that something new is available. -scott