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Command (CMD) File Generation
OPERATION OF GENCMD
The GENCMD utility is invoked at the CCP level by the following command.
GENCMD filename parameter-list
wherefilename corresponds to the hex input file with an assumed (and unspecified)
file type ofH86. GENCMD accepts optional parameters to specifically identify the
8080 Memory Model and to describe the memory requirements of each segment
group. The GENCMD parameters are listed following the filename. The list con-
sists of a sequence of keywords and associated values. The keywords are:
8080
CODE
DATA
EXTRA
STACK
Xl
X2
X3
X4
The 8080 keyword forces a single code group so that the BDOS load function sets up
the 8080 Memory Model for execution. This model allows intermixed code and data
within a single segment. This form of the command is shown below.
GENCMD filename 8080
The remaining keywords follow the filename or the 8080 option and define specific
memory requirements for each segment group corresponding one-to-one with the
segment groups defined in Chapter 2.
For each segment group keyword, the corresponding values are enclosed in square
brackets and separated by commas. Each value is a hexadecimal number represent-
ing a paragraph address or segment length in paragraph units (denoted by hhhh
below). Each value is prefixed by a single letter, which defines its meaning.
Ahhhh
Bhhhh
Mhhhh
Xhhhh
Load the group at absolute location hhhh.
The group starts at hhhh in the hex file.
The group requires a minimum of (hhhh
*
16) bytes.
The group can address a maximum of (hhhh
*
16) bytes.
3-3
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