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Default address range is set according to buffer range of selected device.
Selecting option "Maintain last inserted values" causes that for the next time you open this
dialog, previously confirmed values will be reloaded as default.
The reserved key <Shift+Ctrl+F2> will bring out this menu from any menu and any time.
Buffer / Duplicate buffer content
This command performs duplicate buffer content in range of source EPROM to range of
destination EPROM. This procedure is suitable if there is used for example 27C512 EPROM to
27C256 EPROM position.
Note: The procedure always uses buffer start address 00000h.
Buffer / Checksum
Checksum of data stored in buffer of PG4UW is useful to verify that the buffer data are correct.
PG4UW contains following functions related to checksum:
Tab Checksum calculator , this is on-demand checksum calculator that can calculate and
display various types of checksums of various data blocks in buffer.
Tab Main checksum options contains options for Automatic checksum calculator with
Main checksum value displayed in main window of PG4UW in table Addresses and in
Programmer activity log of PG4UW as "Data checksum of selected buffers:" .
Tab Checksum calculator contains following controls:
Group Buffers included to checksum calculator contains:
Checkboxes to select, which buffers have to be used (included) for checksum calculator.
Data of selected buffers are sequentially processed by checksum calculation as one
data stream, buffer by buffer, in order as listed in group
Buffers included to checksum
calculator .
Address range for each buffer. Addresses are always defined as Byte addresses.
Customizable
Excluded blocks for each buffer. Excluded blocks can be useful for
example for serialization . Serialization usually modifies data at specified addresses in
buffer. So there is problem to check the checksum of buffer, when data on some
addresses were changed by serialization engine before each device programming. If
part of buffer (data block) used for serialization is excluded from checksum calculation,
the checksum of buffer data will not be changed by serialization data changes. One or
more excluded blocks can be specified.
Fields displaying values of calculated checksum types : see description of types at the
bottom.
Column marked as STRAIGHT is result of checksum calculation without additional
adjustments.
Column marked as NEGATED is a negation of checksum so, that SUM + NEG. = FFFFH.
Column marked as SUPPLEMENT is complement of checksum so, that SUM + SUPPL. = 0
(+ carry).
Insert checksum options box - this box contains following options for Calculate & insert
operation:
Insert checksum Kind of checksum that is written into the buffer when, the Calculate
& insert operation was executed.