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88-MODEM.DOC
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1984-04-29
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88-MODEM OPERATING INSTRUCTIONS:
Detailed operating instructions for this program are contained
at the beginning of the source listing (88-MODEM.ASM). Additional
instructions are contained in the publication "DR. DOBBS JOURNAL OF
COMPUTER CALISTHENICS & ORTHODONTIA" VOLUME 3, ISSUE 6 (June/July issue).
The program has been updated since its publication in
DR. DOBBS. as follows:
1. The "handshake" character has been changed from
"ETX" to "LF". This should make it almost univer-
sally applicable.
2. The DELAY routine has been changed to make it hardware
independant.
The only remaining hardware dependant feature of the program is the
"ASSIGN CONSOLE DEVICE" (^A) which provides for reassigning the console
device. This function assumes a TDL ZAPPLE MONITOR.
As mentioned in the DDJ article: If a printing terminal is
used as the console device, it must be capable of operating at twice
the selected communicationa baud rate when disk transfers are per-
formed. Additionally, data loss may be encountered - even at a low
baud rate - in RX FILE mode if the disk controller does not provide
for DMA.