Path: utzoo!attcan!uunet!isc-br!hawk!wddami!wayned From: wayned@wddami.spoami.com (Wayne Diener) Newsgroups: comp.sys.amiga.hardware Subject: Re: Motorola 68302 Message-ID: Date: 14 Oct 90 19:21:57 GMT References: <14767@netcom.UUCP> Sender: uueagle@hawk.isc-br.com (Eagle Proj UUCP login) Lines: 49 >In article <14767@netcom.UUCP> mcmahan@netcom.UUCP (Dave Mc Mahan) writes: > > In a previous article, wayned@wddami.spoami.com (Wayne Diener) writes: >>I went to a Motorola seminar last week and got a little interested >>in a part called the 68302. It has a 68000 core, a 32 bit (source > >I have been using a variation of that chip (the 68332) at work, and wondered >the same thing. The biggest problem I can see with it is that it doesn't >really have a true compatibility with the 68000. The 332 (which I am most >familiar with) is sort of a hybrid 68000/010/020 with a few extra things > > -dave Dont' let the similarity in the part numbers confuse you. The 68302 is only _somewhat_ similar to the 68332 in that it also integrates numerous peripheral functions on-board. Ten feet away from me is my 68332 evaluation board, and the manuals for both the 68302 and the 68332 are scattered around here. To quote from the Motorola manual MC68302UM/AD REV 1: In Section 1: 'The MC68302 integrated multiprotocol processor (IMP) is ... first device to offer the benefits of a closely coupled, industry-standard M68000 micro-processor core and a flexible communications architecture.' In Section 2: 'Refer to the MC68000UM/AD, M680008-/16-/32-Bit Microprocessors User's Manual, for complete details of the on-chip microprocessor.' DTACK ? In Section 5, Table 5-1, the bus control signals are listed as: ~AS, R/~W, ~UDS/A0, ~LDS/~DS, ~DTACK As I said, it looks pretty 68000 compatible to me. --- |---------------------------------------------------------------| | // Wayne D. Diener | | // Spokane, WA | | \\ // E-mail reply to: | | \X/ To: isc-br!hawk!wddami!wayned@uunet.uu.net | |---------------------------------------------------------------|