Routines
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1701: THE 'CLOSE-2' SUBROUTINE
Used by the routine at CLOSE.
The code of the channel associated with the stream being closed has to be 'K', 'S', or 'P'.
Input
BC Offset from the stream data table (STRMS)
HL Address of the offset in the stream data table
CLOSE_2 1701 PUSH HL Save the address of the stream's data.
1702 LD HL,($5C4F) Fetch the base address of the channel information area (CHANS) and find the channel data for the stream being closed.
1705 ADD HL,BC
1706 INC HL Step past the subroutine addresses and pick up the code for that channel.
1707 INC HL
1708 INC HL
1709 LD C,(HL)
170A EX DE,HL Save the pointer.
170B LD HL,$1716 The base address of the CLOSE stream look-up table.
170E CALL INDEXER Index into this table and locate the required offset.
1711 LD C,(HL) Pass the offset to the BC register pair.
1712 LD B,$00
1714 ADD HL,BC Jump to the appropriate routine.
1715 JP (HL)
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