2007-04-27 22:42:41 +00:00
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The cpm platform
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=================
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cpm is an i80-based BSP that generates CP/M executables that can be run on any
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CP/M-compliant machine.
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2019-06-16 18:10:13 +00:00
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CP/M has special needs in many ways, the main one being that it doesn't
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support byte-accessible files --- only complete 128-byte sectors can be read
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or written. The port's read/write/open/close/lseek etc should handle this
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transparently, but trying to write a fragment of a sector will involve a
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read/modify/write cycle. No buffering is done (that's stdio's job).
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2007-04-27 22:42:41 +00:00
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2019-06-16 18:10:13 +00:00
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File descriptors 0, 1 and 2 represent the console, as usual.
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2007-04-27 22:42:41 +00:00
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2019-06-16 18:10:13 +00:00
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In addition, there's a special interface to give applications direct access
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to CP/M. See include/cpm.h for details.
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2007-04-28 22:34:47 +00:00
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2019-06-16 18:10:13 +00:00
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Floating point is not supported and attempts to use floating-point numbers
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will cause the program to terminate.
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2007-04-27 22:42:41 +00:00
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Example command line
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====================
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ack -mcpm -O -o cpm.com examples/paranoia.c
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The file cpm.com can then be run.
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(Although note that Paranoia is very big, and you'll need a CP/M machine with
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lots of memory for it to fit. Which it does, just.)
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David Given
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dg@cowlark.com
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