Mimic CP/M: update FCB's CR, EX and S2 fields even on some errors from sys_readrand() #93
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…ockbaTheBorg#6 is returned (seek past physical end of disk). Updating in the case of a MockbaTheBorg#1 or MockbaTheBorg#4 error mimcs CP/M's behaviour and allows a program to use Random Read as a sort of seek() call to position for a subsequent Seq Write. It's a little weird, but it seems that at least one program out there does that kind of thing. Removed _sys_extendfile() calls from _sys_read* functions. WordStar 4.0 actually does a random read of record# 65530 after it finishes printing a file, and the source file was being inflated to 8MB. Gulp!
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Mimic CP/M: update FCB's CR, EX and S2 fields even on some errors from sys_readrand()
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Update FCB's CR, EX and S2 fields in _ReadRand() unless an error # 6 is returned from _sys_readrand (seek past physical end of disk). Updating in the case of a #1 or #4 error mimcs CP/M's behaviour and allows a program to use _ReadRand as a sort of seek() call to position for a subsequent Seq Write. It's a little weird, but it seems that at least one program out there does that kind of thing.
Removed _sys_extendfile() calls from _sys_read* functions. WordStar 4.0 actually does a random read of record# 65530 after it finishes printing a file, and the source file was being inflated to 8MB. Gulp!