Is there a difference between a sumcheck and a checksum?
A long time ago, when devices were simpler, there was a difference between the sumcheck and the checksum. The sumcheck was calculated from the entire contents of programmer RAM, and the checksum was calculated using only the data file to be programmed into the device. With the advent of encryption arrays, security bits, sector locks, etc., the difference is now muddled to the point where they can be used interchangeably. I chose ‘sumcheck’ for this bulletin because the UniSite manual uses that term. • Can the same device have different sumchecks on different programmers? In general there will be no differences with the same device between Data I/O programmers, we take the time up front to define how the device information will be handled in the sumcheck). There may be occasional times where we decide to change how we handle the calculation due to “unforeseen events, but these are few and far between. Most sumcheck differences appear between Data I/O programmers and non-Data I/O program
