From: Zhang Hong-W17904 (H.Zhang@motorola.com)
Date: Thu Nov 30 2000 - 00:14:39 EST
> -----Original Message----- > From: Joel Stanley [mailto:jstanley@up.edu] > Sent: Thursday, November 30, 2000 12:48 PM > To: uclinux-dev@uClinux.org > Subject: > > > Hi folks, > > Feel like dispelling some more newbie ignorance? Read on! ;) > > For our senior design project we're using the Motorola DragonBall > processor to build a small stand-alone embedded linux system > (i.e. we're > not just buying an evaluation board, we're having our own fabricated, > etc). > > We're working from the M68EZ328ADS board schematics, and we don't feel > that our design needs to have support for the emulation mode > (provided by > the DragonBall processor). From looking at it, it appears that we can > safely extract and discard the capabilities of that board to > support the > emulation mode. Is it a bad thing to ignore the emulation mode? If so, > could you give us an example of why we'd want to use it? Definitely you can ignore the emulation mode. > > If we ignore the emulation support, we'll be left with 1 meg of flash > and 4 megs of DRAM. In the flash, we'll store the bootloader and the > uclinux code (& rom fs, etc). It appears to be relatively > easy to put > the DragonBall in debug mode. After doing so, we think we can use the > UART to directly place the code into DRAM and (using already-written > code) write the bootloader & kernel to flash. Thus, as far as we can > tell, we will have NO need of a ROM burner of any kind for the > project. In fact, we will need no dedicated ROM other than > our 1 meg of > flash. Have we interpreted this correctly? Right. BTW, you can consider 68VZ328ADS at 33M with two UARTs. > > If we can ignore emulation mode & need no other ROM besides flash, > then it appears that all we need to do is write a bootloader > to initialize > chip selects / configure memory map, setup basic interrupt service > routines, and then point to the starting memory location of the > kernel. Are we missing anything vital? :) > > -- > Joel R. Stanley * jstanley@up.edu * #include <std_disclaimer.h> > "You are in a maze of twisty passages, all alike." > > This message resent by the uclinux-dev@uclinux.org list > server http://www.uClinux.org/ > This message resent by the uclinux-dev@uclinux.org list server http://www.uClinux.org/
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