Z85233 Datasheet, PDF (280/317 Pages) Zilog, Inc. – The Zilog SCC Serial Communication Controller

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Application Note
Technical Considerations When Implementing LocalTalk Link Access Protocol
1186
ok:
1187
ld
hl,recerrflg
;fetch receive error flag
1188
res
1189
1,(hl)
;set bit1=0 for frame ok
1
1190
1191 crc_exit:
1192
in
a,(scc_data) ;read 2nd crc (debug only) and
1193
ld
hl,(rxpointer) ;load pointer
1194
dec
hl
;adjust rx buff ptr for crc1
1195
dec
hl
;adjust rx buff ptr for crc2
1196
ld
(rxpointer),hl ;
1197
1198 spexit:
1199
ld
a,038h
1200
out
(scc_cont),a ;reset highest ius
1201
1202
pop
hl
;restore hl
1203
pop
bc
;restore be
1204
pop
af
;restore af
1205
ei
;enable int
1206
ret
;return from int
1207
UM010901-0601
6-145