Curt @ Atari Museum
curt at atarimuseum.com
Fri Mar 4 15:09:14 CST 2011
Thanks for the clarification Chris, as I mentioned I work with Atmel and
Microchip MCU's, so I wasn't 100% sure on the Motorola unit.
Chris Elmquist wrote:
> On Thursday (03/03/2011 at 10:55PM -0500), Curt @ Atari Museum wrote:
>> It has an SPI (Serial Program Interface) so it should conform to a
>> standard MOSI/MISO/RESET/SCK interface.... so I you can tap the pinouts
>> of it, apply gnd and power to it and hook it up to an ISP programmer,
>> you should be able to read in the code from it and save it as a bin or
>> hex file.
> well, no. Not exactly. The SPI on these devices is not used to program or
> in any way access the EPROM on the devices without the 6805 participating
> in such transfers.
> They do have a ROM that facilitates programming and dumping of the EPROM
> and it does this through the serial (SCI) port. However they also have
> a security bit which if set, prevents verifying and dumping the EPROM.
> So, you _could_ dump the EPROM, via the serial port, using the on-chip
> ROM code but only if that security bit has not been programmed.
>> Here's the datasheet:
> section 9.4.8 on page 115 discusses dumping the EPROM...
>> Geoffrey Reed wrote:
>>> I need to pull the rom image off of a MC705C8acpe, anyone know how? Or if it
>>> is possible?
More information about the cctech