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

Registers Affected: AF.
Entry:
DE A pointer to the DCB or FCB to control output.
C Byte to output.
7.6.15 @DATE SVC-18
Get today's date in display format (XX/XX/XX). The SVC can also be used to obtain the
address of the binary storage for the system date. This may be useful for hardware clock
add-ons.
Registers Affected: AF, BC, DE.
Entry:
HL Buffer area to receive date string.
Exit:
DE Returns a pointer to the 5-byte binary date storage:
DATE+0 = year in excess 1900;
DATE+1 = day (1-31);
DATE+2 = month (1-12);
DATE+3 = bits 0-7 of the year's day;
DATE+4 = holds bit-8 of the year's day in bit-0, the day of the week (1-7)
in bits 1-3, and bit-7 is set for a leap year.
7.6.16 @DCINIT SVC-42
This SVC passes a function 2 to a disk driver. It is commonly used for disk controller
initializing. See chapter 4 for additional information.
Registers Affected: AF [Note: DOS saves BC, IY; drivers should save any other
registers they use].
Entry:
C Logical drive number (0-7).
Exit:
A Error return code, if any.
Z Set if the operation was successful.
7.6.17 @DCRES SVC-43
This SVC passes a function 3 to a disk driver. It is commonly used for disk controller
resetting. See chapter 4 for additional information.
Registers Affected: AF [Note: DOS saves BC, IY; drivers should save any other
registers they use].
Entry:
C Logical drive number (0-7).
Exit:
A Error return code, if any.
Z Set if the operation was successful.
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