Category: <b>other operating systems</b>
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<pre><b>INT D4 - PC-MOS/386 v5.01 - SWAP CONTROL BLOCK DATA OF SCB OR TCB</b>

	AH = 2Ah
	BX = offset into control block at which to start swap
	CX = number of bytes to swap
	DX = segment/selector of control block obtained via AH=26h or AH=27h
	DS:SI -&gt; buffer containing new data and to receive current data
Return: CF clear if successful
	CF set on error
	    AX = error code (see also <a href=../../it/80/16.html>#01680</a> at INT 21/AH=59h/BX=0000h)
		05h access denied due to an invalid segment/selector
Note:	the interrupts are disabled during the swap to prevent corruption
SeeAlso: AH=26h,AH=27h,AH=28h,AH=29h
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