NOTES:	SRD REQUIRES DIFFERENT ASSEMBLY FOR RSX11D/IAS OR RSX11M.
	THIS IS BECAUSE SRD USES 'EXTTSK' SPACE FOR ITS SORT AREA
	AND THIS CODE IS CONDITIONALLY SELECTABLE BASED ON THE
	M/D SYSTEM.  NOTE THAT THERE IS A COMMON CODE ROUTINE WHICH
	NOW DOES THIS FOR EITHER SYSTEM, AND THIS COULD BE INCLUDED
	IN SRD BY SOME ENTERPRISING USER...
 
	THE VERSION OF SRD HERE IS ASSEMBLED FOR RSX11D/IAS. IN ORDER
	TO ASSEMBLE IT ON AN 'M' SYSTEM, CHANGE THE VALUE OF THE
	CONDITIONAL 'IAS' IN THE PREFIX FILE.
 
	SRD LIKES ABOUT 4K WORDS OF EXTTSK SPACE FOR MOST DIRECTORIES.
	IF THE TARGET SITE HAS LOTS OF REALLY BIG DIRECTORIES, IT
	MIGHT BE ADVISABLE TO INCREASE THIS TO 8K WORDS.