Checksum

[Guest]

A co-worker sent me a file .mot for programming a 29EE020 EPROM. Along with the file he sent me the checksum. We've checked the S$ settings and they seemed the same. The checksum are different.

Any clue what can be the problem ?

1. We both used 0000-3fff range
2. Comm speed is 115kps

[Dataman (Neil Parker)]

Hi,

Are the checksums way off or quite similar?
I would try filling the S4 RAM with FFh then transfering the file as any gaps in the file are not written to the S4 RAM, leaving whatever was there before.

Neil

[Guest]

I have a variant of this problem. It appears that the S4 fills <n> bytes with zeroes up to the next 32 bytes boundary (related to UL byte/line parm?) and THEN starts to fill with FFFF's. Another programmer (Pilot) fills with FF right after the last data byte. The result is different checksums on different S4s for the same .mot file and 29EE020.

How can I prevent this gap of 0000's?

Pat Coghlan