
APPENDIX 3 CONVERSION OF SEQUENCE PROGRAM
3.4.1.3 Protocol
Durinq uploadinq
When the FLOADAT command is executed on the PC side, a communications request is
issued for the P-G and reception begins. After all data has been received, DC 3 is sent and
transmission is completed.
0 DC 1 code is sent to the P-G (data transmlssion request).
0 Data is received.
(Z$J Completion code is received and reception is completed.
@ DC 3 code is sent.
Transmisston and reception both use the l-byte machlne-dependent BIOS call for input and
output.
Durinq downloading
After the P-G issues a transmission request, the P-G enters the waiting state. FLOADAT is
activated in the PC, then transmission begins. After all data has been sent, DC 4 is sent and
transmission is completed.
0 The P-G issues DC 1.
8 DC 2 code is sent to the P-G
0 Data is sent.
@I DC 4 code is sent.
Transmlsslon and reception both use the l-byte machine-dependent BIOS call for input and
output.
3.4.1.4 BUSY control
When the transmtsslon speed is faster than reception processing, BUSY control is performed by
issuing the DC 1 and DC 3 codes.
In the IBM PC/AT series, there is no X parameter, which
effectively has the same resull.
A3-12