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Section A:
System interface
************************************************************************
•
•
•
26 - Set DMA Address
•
•
•
************************************************************************
On entry:
C
DE
On return:
lAH
DMA address
Possible logical errors:
- none -
Possible physical errors:
- none -
Differences to CP/M plus:
Passwords specified in the DMA buffer are ignored.
Differences to CP/M 2.2 resp. DiCOS:
- none -
The
address
specified
by register pair DE denotes the
begin
of
the
memory
buffer
for
all future disk I/0.
The DMA buffer
is
used
for
buffering information with a number of other functions, too, Contrary to
CP/M plus, passwords are ignored, as EOS does not support passwords.
Beyond disk I/0 functions,
the following functions make use of the
DMA
buffer for information transfer:
1~
-
read line from console
17 - search for file
18 - search for subsequent entries
46 - get free disk space
47 - chain program
EOS System manual
Daeumling
&
Zimmermann
Page 62
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