STATUS @Iopath,2 always returns a 4.
STATUS @File,3 returns the current length, not the CREATE length. Under HTBasic, files are extendible.
The STATUS() function (as opposed to the STATUS statement) is an addition to HTBasic. Any STATUS or CONTROL registers greater than 99 are also additions.
As in HP BASIC, STATUS register 0 of interface cards contains the card ID. Interface cards that are available on a PC, but not on an HP BASIC Workstation are identified with ID numbers greater than or equal to 300.
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