Register parameters
| Code Block |
|---|
| language | none |
|---|
| title | RST 20H, DEFW DEFB $8D |
|---|
|
NIN:
L = reason code
Other register parameters depend on reason code
OUT:
Depends on reason code, see below.
IX will always be unchanged. |
...
Full details of this call's reason codes are found below. This interface is used by OZ internally, and don't work on application level. For Application level serial port I/O, use GN_Opf to get serial port handle and use OS_Gb / OS_Pb to transmit data. Applications might use OS_Si to reset serial port buffers, and interact with the Panel. Block transfer is implemented since OZ version 4.5.
Other information of this call can be found in the The Serial Interface section.
SI_HRD
| Code Block |
|---|
| title | SI_HRD (L = $00), Serial hard reset |
|---|
|
IN: -
OUT: Fc = 0
Registers changed after return:
..BCDEHL/IXIY same
AF....../.... different |
...
This call should be useful to install new panel settings or when starting low level (ie. using SI_GBT, SI_PBT etc.) serial operations. It carries out the following:
1. Empty receive and transmit buffers.
2. Reset the XON/XOFF flags.
3. Reset baud rates, parity and flow control settings to the PANEL values.
4. Assert RTS.
5. Resets the serial port timeout to its default of 10 minutes.
SI_INT
| Code Block |
|---|
| title | SI_INT (L = $06), interrupt entry point |
|---|
|
...
|
IN: -
OUT: -
Registers changed after return:
AFBCDEHL/IXIY same
......../.... different |
Internal operating system usage only.
This call is used by the serial port driver to send XOFF when software handshaking is active.
SI_GBT
| Code Block |
|---|
| language | none |
|---|
| title | SI_GBT (L = $09), get byte from serial port |
|---|
|
IN: BC = timeout in centiseconds
Out if call succeeded:
Fc = 0
A = byte received
BC = remaining time
Out if call failed:
Fc = 1
A = RC_TIME ($02) (if no data available before timeout)
Registers changed after return:
....DE../IXIY same
AFBC..HL/.... different |
...
A slot, in this context, is the set of bits required to transmit on character. This will include 8 data bits plus start and stop bits.
SI_FTX
| Code Block |
|---|
| language | none |
|---|
| title | SI_FTX (L = $12), Flush transmit buffer |
|---|
|
IN: -
OUT: Fc = 0
Registers changed after return:
A.BCDEHL/IXIY same
.F....../.... different |
SI_FRX
| Code Block |
|---|
| language | none |
|---|
| title | SI_FRX (L = $15), Flush receive buffer |
|---|
|
IN: -
OUT: Fc = 0
Registers changed after return:
A.BCDEHL/IXIY same
.F....../.... different |
SI_TMO
| Code Block |
|---|
| language | none |
|---|
| title | SI_TMO (L = $18), set default timeout |
|---|
|
IN: BC = new value for default timeout
OUT: Fc = 0
Registers changed after return:
A.BCDEHL/IXIY same
.F....../.... different |
If you set the default to $FFFF then when the default is used (by setting a timeout value of $FFFF in get and put byte routines) then the system will wait forever. A soft reset sets the default timeout to 10 minutes. This timeout is completely independent of the system timeout, which is set by the Panel.
SI_GX
| Code Block |
|---|
| title | SI_GX (L = $1B), get multiple bytes from serial port, using default timeout (OZ 4.5) |
|---|
|
IN:
BC = number of byte to get from serial port, maximum 16384, one bank
DE = destination
DE = 0, write bytes to a file opened with its handle in IX
DE > 0, write bytes to memory at (DE)
IX = file handle (if DE = 0)
Out if call succeeded:
Fc = 0
BC = remaining time (SI_TMO)
DE = points at last byte fetched + 1 (if DE(IN) > 0)
Out if call failed:
Fc = 1
A = RC_TIME, timeout elapsed
A = RC_EOF, end of file reached
A = RC_WP, input device is read protected
BC = number of bytes not read
Registers changed after return:
......../IXIY same
AFBCDEHL/.... different |
SI_PX
| Code Block |
|---|
| title | SI_PX (L = $1E), put multiple bytes to serial port, using default timeout (OZ 4.5) |
|---|
|
IN:
BC = number of byte to write to serial port, maximum 16384, one bank
DE = input
DE = 0, input is a file/device opened with its handle in IX
DE > 0, input is memory at (DE)
IX = file handle (if DE = 0)
Out if call succeeded:
Fc = 0
BC = remaining time (SI_TMO)
Out if call failed:
Fc = 1
A = RC_TIME, timeout elapsed
A = RC_EOF, end of file reached
A = RC_RP, input device is read protected
BC = number of bytes not written
Registers changed after return:
......../IXIY same
AFBCDEHL/.... different
|
SI_GXT
| Code Block |
|---|
| title | SI_GXT (L = $21), get multiple bytes until ESC <x> terminator, using default timeout (SI_TMO) |
|---|
|
IN:
BC = number of byte to get from serial port, maximum 16384, one bank
DE = destination
DE = 0, write bytes to a file opened with its handle in IX
DE > 0, write bytes to memory at (DE)
IX = file handle (if DE = 0)
Out if call succeeded, Fc = 0:
Fz = 1,
BC <> 0, A = ESC terminator encountered, number of bytes not read
Fz = 0,
A = FFh
BC = 0, all bytes read, no terminator encountered
DE = points at last byte fetched + 1 (if DE(in) > 0)
Out if call failed:
Fc = 1
A = RC_TIME, timeout elapsed
A = RC_EOF, end of file reached
A = RC_WP, input device is read protected
BC = number of bytes not read
Registers changed after return:
......../IXIY same
AFBCDEHL/.... different |