jdevries@zodiac.ADS.COM (Jeff De Vries) (02/01/90)
[I realize this isn't the right newsgroup for this, but it seemed the closest... ] I'd like to cobble together a small system using the 68HC11 micro- controller chip. I've downloaded the source for the BUFFALO monitor from the Motorola BBS and noticed the starting address is the same as the internal ROM address on the 68HC11. My question is: Does Motorola have available 68HC11's with the BUFFALO monitor already masked into the ROM? If not, can I override the internal ROM with an external ROM containing the monitor? Thanks! -- Jeff De Vries Advanced Decision Systems Sr. Software Engineer 1500 Plymouth Street jdevries@ads.com; (415) 960-7300 Mountain View, CA 94043-1230
jones@optilink.UUCP (Marvin Jones) (02/02/90)
In article <10696@zodiac.ADS.COM>, jdevries@zodiac.ADS.COM (Jeff De Vries) writes: > My question is: Does > Motorola have available 68HC11's with the BUFFALO monitor already > masked into the ROM? If not, can I override the internal ROM with > an external ROM containing the monitor? I believe the answer to both questions is yes. I know that if you purchase a ROMless HC11, and subsequently enable the ROM using the ROMON bit in the Config register ($x03F:1), there is a high probability that you will find some other Motorola customer's program there. This is stated in the HC11 Reference Manual. It seems to me that a Motorola rep told us that sometimes Buffalo would be there, as well. But I can't see any part number listing for an HC11 with Buffalo. But I think that is what they use in their evaluation kits. Best bet is to call Motorola Microcontroller Div. in Austin or call their Freeware BBS there. As mentioned earlier, the 2nd bit of the Config register will enable/disable the internal ROM space. This solves the second question. Hope this helps. -- Marvin Jones Optilink Corp. Petaluma, CA 707.795.9444 X206 uucp: {tekbspa, pyramid, pixar}!optilink!jones cis: 71320,3637 aol: mjones
easton@andrews.edu (Jeff Easton) (02/03/90)
In article <10696@zodiac.ADS.COM>, jdevries@zodiac.ADS.COM (Jeff De Vries) writes: > [I realize this isn't the right newsgroup for this, but it seemed > the closest... ] comp.sys.m6809 is closer ;^) > I'd like to cobble together a small system using the 68HC11 micro- > controller chip. I've downloaded the source for the BUFFALO monitor > from the Motorola BBS and noticed the starting address is the same > as the internal ROM address on the 68HC11. My question is: Does > Motorola have available 68HC11's with the BUFFALO monitor already > masked into the ROM? If not, can I override the internal ROM with > an external ROM containing the monitor? From the M68HC11 Reference Manual, page 3-5, last paragraph, "The erased state of the CONFIG [register] is $0F on an MC68HC11A8. The MC68HC11A1 is the same die as the MC68HC11A8 but comes from the factory with $0D in CONFIG to disable the internal 8K-byte masked ROM." Your local Motorola Rep should be able to get you this book, P/N M68HC11RM/AD. > > Thanks! > > Jeff De Vries Advanced Decision Systems Jeff Easton Zenith Data Systems Systems Engineer OEM Engineering easton@andrews.edu -- or -- ..uunet!zds-asg!zds-oem!easton Save the Otters! I'd rather be Water Skiing....