Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!uunet!microsoft!brianw From: brianw@microsoft.UUCP (Brian WILLOUGHBY) Newsgroups: comp.sys.apple Subject: Re: 65c02's big brother Summary: WDC better source than JameCo Message-ID: <50005@microsoft.UUCP> Date: 13 Feb 90 02:17:12 GMT References: <7359@wpi.wpi.edu> <15800032@ux1.cso.uiuc.edu> <7381@wpi.wpi.edu> <76434@tut.cis.ohio-state.edu> Reply-To: brianw@microsoft.UUCP (Brian WILLOUGHBY) Organization: Microsoft Corp., Redmond WA Lines: 67 In an article rafael t yu writes: > >. with the 65c802 you won't >be able to run any true 16-bit software, but you computer will work a little >faster than using the 4Mhz 65c02. Clarification: Your computer will only run faster if you rewrite the software - sometimes twice as fast. If you execute 65C02 code, then the 65C802 executes it at the same speed (or actually slower if the 65C802 is set to 6502 Emulation mode - the 65C802 is actually MORE compatible with the 6502 than the 65C02 is in the area of clock cycles per instruction). You can run "true" 16-bit software, the only hitch is that you cannot run 16-bit software that was written for GS/OS or that uses other GS-specific resources (i.e. 16 Meg addresses). There is nothing preventing an older Apple ][ from running 16-bit software, but you can't turn a ][ Plus into a GS only by changing the processor. > Also, if you are going to order the chip from Jameco make sure to specify for >the 4Mhz version. They have several versions and I'm pretty sure you don't >want to end up with a 1Mhz. I wouldn't recommend ordering the 'C802 from JameCo, although I do recommend JameCo highly for other products. An engineer at WDC warned me that JameCo had old stock (although that could be different now), and he attributed some of my 'C802 problems to the fact that I had a very early version of the 'C802. Western Design Center is a much better source of NEW 65C802 parts. Call them at 602/962-4545. Their minimum order is $50, which is higher than JameCo, but it is worth the extra trouble to purchase the latest revision of the 65C802. Perhaps someone could organize and Net purchase (sorry, I already have too many 4, 8 and 10MHz 65C802s!). BTW, I also do not recommend JameCo's own brand of Apple expansion products - they usually have cheaper parts that aren't to spec. As a specific example, their 16K RAM card came with 200ns DRAMs and did not work on my friend's Apple ][ Plus until he replaced the DRAMs with 150ns parts (the same speed as came with my Language Card form another vendor). In article <76435@tut.cis.ohio-state.edu> rafael t yu writes: > > I believe that the 10Mhz 65C816 are at about $100 if you buy it individually >and lower prices for bigger orders. The address I believe is: Where did you get that price? About a year ago, they were from $17.80 for 4 MHz to $24.84 for 10 MHz. IF THEY HAVE THEM IN INVENTORY. WDC sells out of every batch that they get. And don't forget to ask them for data sheets. They were more than happy to supply me with data sheets on about three or four of their 6502 superset chips, some with RAM, ROM, timers and serial and parallel ports built in! P.S. If anyone has any particular problems getting a 65C802 working in their Apple ][ Plus, feel free to send me some email. I've had to do a lot of debugging of various alternate processors for the Apple, so I might be able to help. Brian Willoughby UUCP: ...!{tikal, sun, uunet, elwood}!microsoft!brianw InterNet: microsoft!brianw@uunet.UU.NET or: microsoft!brianw@Sun.COM Bitnet brianw@microsoft.UUCP