The OS_Sp call is a companion to the OS_Nq and is used to set system parameters, notably the Panel and the PrinterEd settings. A call is made by loading register pair BC with a reason code and the other registers with values specific to that reason code. Register changes and output specifications are different for each reason code. The OS_Sp interface call is as follows:
| Code Block | ||||
|---|---|---|---|---|
| ||||
RST 20H, DEFB $69 IN: BC = reason code HL = pointer to data A = length (size) of data OUT, if call succeeded: Fc = 0 OUT, if call failed: Fc = 1 A = return code: RC_BAD ($04), incorrect reason code or parameter RC_UNK ($03), unknown request |
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Symbol (reason code) Size Meaning
PA_Txb ($8016) 2 (or 1) Transmit baud rate - binary
PA_Rxb ($8017) 2 (or 1) Receive baud rate - binary
PA_Xon ($8018) 1 Xon/Xoff 'Y' or 'N'
PA_Par ($8019) 1 Parity 'O', 'E', 'M', 'S' or 'N'
Printer Editor values (highlights & translation tables)
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