The Programmer's Guide to TRSDOS Version 6 - Tim Mann's Home ...

Entry:
C Contains the character to print.
Exit:
A Will contain the error code if the SVC was unsuccessful.
Z Set if the SVC was successful.
7.6.64 @PUT SVC-04
This SVC will output a byte to a logical device or a file.
Registers Affected: AF.
Entry:
DE A pointer to the Device or File Control Block of the output device.
C Contains the byte to output.
Exit:
A Will contain an error return code if the SVC was unsuccessful.
Z Set if the SVC was successful.
7.6.65 @RAMDIR SVC-35
This SVC provides abbreviated information from the directories of visible files as well
as free space information for a disk. It will provide information similar to the RAMDIR
vector on earlier Model III TRSDOS 1.3. Register C is used to pass a function code to the
SVC. Linkage is as follows:
Total Directory
Registers Affected: AF.
Entry:
C 0; Obtain directory records of all visible files.
B Should contain the logical drive (0-7) for the disk.
HL A pointer to your buffer which will be passed the data.
Exit:
A Returns an error code if the operation encountered an error.
Z Set if the SVC was successful.
File Directory
Registers Affected: AF.
Entry:
C 1-254; Obtain the directory record for the file whose Directory Entry Code
(DEC) is equal to register C+1.
B Should contain the logical drive (0-7) for the disk.
HL A pointer to your buffer which will be passed the data.
Exit:
A Returns an error code if the operation encountered an error.
Z Set if the SVC was successful.
The information passed to your buffer will consist of 22-byte records. The buffer
is terminated by a plus sign ("+"). Each record is fielded as follows:
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