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3.7.4.2 MOVCPM
Sometimes it is required to construct a version of CP/M which does not load into
memory in the standard position. This may be because you wish to reserve some
memory for other purposes, so CP/M itself must be moved to a lower portion of
memory. It is possible to locate CP/M at any position in memory on a 256-byte
boundary. The position is specified by a size parameter in the range 64 to 179. This
parameter indicates the number of 256-byte areas available for CP/M and transient
programs.
The resulting relocated CP/M can either be written to the system disc using SYSGEN
or saved using a command prompted by the MOVCPM program.
The syntax of the command is MOVCPM <size> *
eg MOVCPM 178 * will make a CP/M 256 bytes lower in memory than the standard
version (which is created with the maximum possible size of 179).
3.7.4.3 SYSGEN
SYSGEN writes the result of a MOVCPM command onto the system tracks of a system
or vendor disc. There are three options:
SYSGEN * will write the CP/M generated by an immediately preceding MOVCPM
command.
SYSGEN <filename> will read in the specified file, which will probably have been
saved after a MOVCPM command, and write that to the system tracks. eg. SYSGEN
CPM44.COM
SYSGEN with no parameters will prompt for a Source and Destination disc and
therefore copy the system tracks from one disc to another. This is the option to use if
upgrading a Vendor disc to a System disc.
3.7.4.4 BOOTGEN
As discussed in section 3.2 and 3.3 there is more to the system tracks than just CP/M.
BOOTGEN, which will prompt for source and destination discs, copies the Sector 1,
track 0 (the loader) and the configuration sector from one disc onto another. Use
BOOTGEN as part of the process of upgrading a Vendor disc to a system disc, or when
you want to distribute a newly designed configuration sector around a number of discs.
3.7.5 Advanced programming
The following programs are for specialist use and it is recommended that the user
consults SOFT 159-A Guide to CP/M or other reference works.
ASM
8080 Assembler.
DDT
8080 Assembly code debugging aid.
DUMP
Hexadecimal file dump utility.
ED
A simple context editor.
SUBMIT
Console command mode Batch processing
XSUB
Transient program batch processing.
Chapter 3.9 AMSTRAD Disc Drive & Interface DDI-1 Manual