Mike Coates wrote:
If a 68000 system uses 8 bit roms then they will be interleaved in the memory map, hence generating the rom signature for just the 8 bit rom on it's own is not going to match.
I guess it either uses a different algorithm, or you need to interleave the two roms, and generate the checksum for the new double sided rom.
biggest pain I found with the Fluke pod is that you can only do 16 bit read/writes - I had some hardware that had a custom chip that processed 32 bit writes, so had to 'poke' some machine code in to ram and call that to do the job.
Hey, the machine runs on a Z80! It was designed in the mid to late 70s after all...8-bits was king, 16 and 32 bits were minis or supercomputers. John ;-#)#
On 09/06/2010 21:29, Colin Davies wrote:
OK... That kind of makes sense.....When I get my pod pluged into the working board again (once I've fixed the header) , I'll try to do some homework !!!
eg.... read location 0000 in.... and see if its 16 bits and the pair of 8 bits matches the first bytes of both roms :-)
Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ftp.flippers.com/TTL/TestEquipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/
-- John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames) www.flippers.com "Old pinballers never die, they just flip out" _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ftp.flippers.com/TTL/TestEquipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/