Model 100 Serial Interface: Difference between revisions
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| Bit || Function || Note | |Bit || Function || Note | ||
|- | |- | ||
| 0 || Stop bits || 0 => 1 stop bit; 1 => 2 stop bits | |0 || Stop bits || 0 => 1 stop bit; 1 => 2 stop bits | ||
|- | |- | ||
| 1 || Parity || 0 => Odd parity; 1 => Even | |1 || Parity || 0 => Odd parity; 1 => Even | ||
|- | |- | ||
| 2 || Parity Inhibit || 0 => Parity; 1 => No parity | |2 || Parity Inhibit || 0 => Parity; 1 => No parity | ||
|- | |- | ||
| 4-3 || Character length selected || | |4-3 || Character length selected || Number of bits: 00 => 5, 01 => 6, 10 => 7, 11 => 8 | ||
|- | |- | ||
| 7-5 || Unused || | |7-5 || Unused || | ||
|} | |} | ||
Revision as of 15:55, 1 February 2009
Configuration
Serial Word Format
Port $D8 controls the serial word format.
| Bit | Function | Note |
| 0 | Stop bits | 0 => 1 stop bit; 1 => 2 stop bits |
| 1 | Parity | 0 => Odd parity; 1 => Even |
| 2 | Parity Inhibit | 0 => Parity; 1 => No parity |
| 4-3 | Character length selected | Number of bits: 00 => 5, 01 => 6, 10 => 7, 11 => 8 |
| 7-5 | Unused |
Baud Rate
Data Transmission
Data Reception
I/O Map
| Name | Direction | Port |
| TX | Output | $C8 |
| RX | Input | $C8 |
| RTS | Output | $BA, bit 7 |
| CTS | Input | $BB, bit 4 |
| DSR | Input | $BB, bit 5 |
| DTR | Output | $BA, bit 6 |
Direction indicates both data flow, and whether to use an IN or OUT instruction to read/write to the given pin.
