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en:docs:macrolib:auxinit [2022/03/29 13:47] – created prokushev | en:docs:macrolib:auxinit [2022/10/02 03:31] (current) – prokushev | ||
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===== Brief ===== | ===== Brief ===== | ||
- | Clear screen | + | Initialize serial port |
+ | |||
+ | ===== BIOS Interrupt ===== | ||
+ | |||
+ | [[en: | ||
+ | |||
+ | ===== Family API ===== | ||
+ | |||
+ | [[en: | ||
===== Syntax ===== | ===== Syntax ===== | ||
<code asm> | <code asm> | ||
- | @AuxInit | + | @AuxInit |
</ | </ | ||
===== Parameters ===== | ===== Parameters ===== | ||
- | none | + | * port (WORD) - port number |
+ | * settings (BYTE) - port settings | ||
+ | |||
+ | Baud rates is passed in the high order 3 bits as follows: | ||
+ | |||
+ | | 000 | 110 baud | | ||
+ | | 001 | 150 baud | | ||
+ | | 010 | 300 baud | | ||
+ | | 011 | 600 baud | | ||
+ | | 100 | 1200 baud | | ||
+ | | 101 | 2400 baud | | ||
+ | | 110 | 4800 baud | | ||
+ | | 111 | 9600 baud | | ||
+ | |||
+ | |||
+ | Bits 4-3 define parity: | ||
+ | | 00| no parity | | ||
+ | | 10 | no parity | | ||
+ | | 01 | odd parity | | ||
+ | | 11 | even parity | | ||
+ | |||
+ | Bit 2 defines stop bits: | ||
+ | | 0 | 1 stop bit | | ||
+ | | 1 | 2 stop bits | | ||
+ | |||
+ | Bits 1-0 character length: | ||
+ | | 10 | 7 bits | | ||
+ | | 11 | 8 bits | | ||
===== Return ===== | ===== Return ===== | ||
- | none | + | * AX - port status |
+ | |||
+ | Bitfields for serial line status (AH): | ||
+ | ^ Bit(s) ^ Description ^ | ||
+ | | 7 | timeout | | ||
+ | | 6 | transmit shift register empty | | ||
+ | | 5 | transmit holding register empty | | ||
+ | | 4 | break detected | | ||
+ | | 3 | framing error | | ||
+ | | 2 | parity error | | ||
+ | | 1 | overrun error | | ||
+ | | 0 | receive data ready | | ||
+ | Bitfields for modem status (AL): | ||
+ | ^ Bit(s) ^ Description ^ | ||
+ | | 7 | carrier detect | | ||
+ | | 6 | ring indicator | | ||
+ | | 5 | data set ready | | ||
+ | | 4 | clear to send | | ||
+ | | 3 | delta carrier detect | | ||
+ | | 2 | trailing edge of ring indicator | | ||
+ | | 1 | delta data set ready | | ||
+ | | 0 | delta clear to send | | ||