ZiLOG Z80 Handbook page 235

E
B
A
N
# BYTES/ ENTRY
#OF ENTRIES
B-BIT KEY VALUE
ENTRY 1
# BYTESIENTRY
ENTRY 2
M -1
M
TYPICAL ENTRY
M BYTES LONG, KEY
IN BYTE 0
1
Fig. 16-3. Table search routine.
of entries remaining in the table. The reentry address is a second
entry point in the routine. The initial entry is at SRTAB, while the
"reentry" point is at SRTAB1.
SRTAB LD
D,0 NOW HAVE # BYTES/ ENTRY IN D,E
LOOP
CP A,(IX) COMPARE SEARCH KEY TO ENTRY
RET Z
GO IF MATCH
SRTABI ADD
IX,DE BUMP IX TO NEXT ENTRY
DJNZ LOOP
GO IF NOT LAST ENTRY
LD IX,-1 FLAG FOR NOT FOUND
RET
RETURN
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