Model 100 Serial Interface: Difference between revisions
From Bitchin100 DocGarden
Jump to navigationJump to search
| Line 8: | Line 8: | ||
|Bit || Function || Note | |Bit || Function || Note | ||
|- | |- | ||
|0 || Stop bits || 0 | |0 || Stop bits || 0 → 1 stop bit<br/>1 → 2 stop bits | ||
|- | |- | ||
|1 || Parity || 0 | |1 || Parity || 0 → Odd parity<br/>1 → Even | ||
|- | |- | ||
|2 || Parity Inhibit || 0 | |2 || Parity Inhibit || 0 → Parity<br/>1 → No parity | ||
|- | |- | ||
|4-3 || Character length selected || Number of bits | |4-3 || Character length selected || Number of bits;<br/>00 → 5<br/>01 → 6<br/>10 → 7<br/>11 → 8 | ||
|- | |- | ||
|7-5 || Unused || | |7-5 || Unused || | ||
Revision as of 16:02, 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.
