OS_Fth, Free tri-handle

Register parameters

RST 20H, DEFW $DE06

IN:
     A = Tri-handle subtype
     TH_FILT ($F0), free filter handle
     TH_WMG ($F1), free wildcard manager handle
     TH_ALM ($F2), free alarm handle
     IX = tri-handle

OUT, if call successful:
     Fc = 0, handle freed
     IX = 0
     BHL = Tri-handle contents

OUT, if call failed:
     Fc = 1
     A = RC_HAND, bad handle

Registers changed after return:
     ...CDE../..IY same
     AFB...HL/IX.. different

Notes

Internal operating system usage.

Related calls

OS_Vth, verify tri-handle
OS_Gth, get tri-handle