Sharp MZ-800 - Page 202

Name and entry point (hex.)
Function
Registers saved]
CALL MSTP
(0047)
Stops the sound generated with the CALL MSTA
subroutine.
All except AF
CALL TIMST
(0033)
Sets and starts the built-in clock. The registers must be set
as follows before this routine is called.
ACC + 0 (AM), ACC + 1 (PM)
DE + 4-digit hexadecimal number representing the time
in seconds,
CALL TIMRD
(003B)
Reads the built-in clock and returns the time as follows.
ACC + 0 (AM), ACC = 1 (PM)
DE + 4-digit hexadecimal number representing the time
in seconds.
CALL BRKEY
(001)
Checks whether the [S and [BREAK] keys are both
being pressed. The Z flag is set when they are being pressed
simultaneously; otherwise, it is reset.
CALL GETL
(0003)
Reads one line of data from the keyboard and stores it in
the memory area starting at the address in the DE register.
This routine stops reading data when the key is pressed,
then adds a carraige return code (OD) to the end of the data
read.
A maximum of 80 characters (including the carriage return
code) can be enered in one line.
Characters keyed in are echoed back to the display. Cursor
control codes can be included in the line.
When the and keys are pressed simultane-
ously, the BREAK code is stored at the address indicated
by the DE register and a carriage return code is sotored in
the following address.
CALL GETKY
(001B)
Special key read with
GETKY
T Reads a character code (ASCII) from the keyboard.
If no key is pressed, control is returned to the calling pro-
gram with 00 set in ACC.
No provision is made to avoid data read errors due to key
bounce, and characters entered are not echoed back to the
display.
When any of the special keys (such as or [CR]) are
pressed, this subroutine returns a code to the ACC which is
different to the corresponding ASCII code as shown below.
Here, display codes are used to address characters stored in
the character generator, and are different from the ASCII
codes.
Special key Code loaded in ACC} _ Display code
60 c7
61 c8
62 co
64 CB
66 cD
il cl
12 c2
13 C3
14 C4
15 cs
16 C6
All except AF
All except AF
and DE
All except AF
All registers
All except AF