Sharp MZ-800 - Page 203

Name and entry point (hex.)
Function
Registers saved
CALL ASC
(03DA)
Loads the ASCII character corresponding to the hex-
adecimal number represented by the lower 4 bits of data in
ACC,
All except AF
CALL HEX
(03F9)
Converts the 8 data bits stored in the ACC into a hex-
adecimla number (assuming that the data is an ASCII
character), then loads the hexadecimal number in the lower
4 bits of ACC. The C flag is set to 0 when a hexadecimal
number is loaded in ACC; otherwise, it is set to 1.
CALL HLHEX
(0410)
CALL 2HEX
(041F)
CALL ??KEY
(09B3)
CALL ?ADCN
(OBB9)
All except AF
Converts a string of 4 ASCII characters into a hexadecimal
number and loads it in the HL register. The call and return
conditions are as follows.
DE + Starting address of the memory area which con-
tains the ASCII character string.
(eg. mg apr way
CALL HLHEX ‘_DE
CF=0 HL+hexadecimal number (e.g., HL =31ASn)
CF=1 The contents of HL are not guarenteed.
5
All except AF
and HL
Converts a string of 2 ASCII characters into a hexadecimal
number and loads it into the ACC. The call and return con-
ditions are as follows.
DE + Starting address of the memory area which con-
tains the ASCII character string.
(eg. a “A” +)
CALL 2HEX DE
CF=0 ACC+hexadecimal number (e.g., ACC =3An)
CF=1 The contents of the ACC are not guaranteed.
All except AF
and DE
Blinks the cursor to prompt for key input. When a key is
pressed, the corresponding display code is loaded into the
ACC and control is returned to the calling program.
Ee
All except AF
Converts ASCII codes into display codes. The calli and
return conditions are as follows. © «
ACC + ASCII code ome nla
CALL ?ADCN sem erat
ACC + Display code
All except AF
CALL ?7DACN
(OBCE)
CALL ?BLNK
(ODA6)
CALL ?DPCT
(ODDC)
Converts display codes into ASCII codes. The call and
return conditions are as follows.
ACC + Display codes
CALL ?DACN
ACC + ASCII code
All except AF
Detects the vertical blanking period. Control is returned to
the calling program when the vertical blanking period is
entered.
All registers
Controls display as follows.
ACC Control ACC} Control
Scrolling C6n | Same as the
Same as the key. | C7#| Same as the
Same as the C8u | Same as the [1
Same as the key. | C9n| Same as the
Same as the [=] key, [ALPHA] key.
Same as the CDu| Same as the [CR] key.
HOME | key.
Clu
C2
C3n
C4u
CSu
ther
ma a
<
CALL ?POINT
(OFB1)
Loads the current cursor location into the HL register. The
return conditions are as follows.
CALL ?POINT
HL + Cursor location (binary)
All registers
All except
AF and HL
A-16
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