Turbo232 Swiftlink Registers.txt

Turbo232, Swiftlink and compatibles - register description

was derived from a file named "TURBO232.DOC" and simply requires a fixed width font. :)

Sorry, no dredits.

---

  +-------------------------------------------------------------------
  |
  |      TURBO232, SWIFTLINK AND COMPATIBLES - REGISTER DESCRIPTIONS
  |
  +-------------------------------------------------------------------
  |
  |   $DE00/56832/SWIFTLINK+0        Data Register
  |   $DE01/56833/SWIFTLINK+1        Status Register
  |   $DE02/56834/SWIFTLINK+2        Command Register
  |   $DE03/56835/SWIFTLINK+3        Control Register
  |   $DE04/56836/SWIFTLINK+4        Undefined Register
  |   $DE05/56837/SWIFTLINK+5        Undefined Register
  |   $DE06/56838/SWIFTLINK+6        Undefined Register
  |
  | Turbo-232 only:
  |
  |   $DE07/56839/TURBO232+7         Enhanced-Speed Register
  |
  | Other Base-Addresses may be: $D700/55040 or $DF00/57088
  |
  +-------------------------------------------------------------------
 


 $DE00/56832/SWIFTLINK+0:   Data Register

   Bytes to be send or received are stored in this register.



 $DE01/56833/SWIFTLINK+1:   Status Register

 Read:

   +-------+--------------------------------------------------------+
   | Bit 7 |   Interrupt Flag: 1 = Interrupt caused by SwiftLink    |
   | Bit 6 |   Carrier Detect: 1 = Carrier present                  |
   | Bit 5 |   DSR:            1 = High, 0 = Low                    |
   | Bit 4 |   Transmit Flag:  1 = Ready to get next Byte to        |
   |       |                       transmit in Data Register        |
   |       |                   0 = Chip currently sending Byte      |
   | Bit 3 |   Receive Flag:   1 = Byte received in Data Register   |
   |       |                   0 = Nothing received                 |
   | Bit 2 |   Overrun:        1 = Overrun occured (*)              |
   | Bit 1 |   Frame Error:    1 = Frame Error occured (*)          |
   | Bit 0 |   Parity Error:   1 = Parity Error occured (*)         |
   +-------+--------------------------------------------------------+

    (*) = Self-Clearing when read

 Write:
         Any write access will reset SwiftLink.






 $DE02/56834/SWIFTLINK+2:   Command Register

   +----------+---------------------------------------------------+
   | Bits 7-5 |   Parity: 000 = None            101 = Mark        |
   |          |           001 = Odd             111 = Space       |
   |          |           011 = Even                              |
   | Bit  4   |   Echo: 1 = On                                    |
   | Bit  3-2 |         Transmitter IRQ |  RTS  | Transmitter     |
   |          |         ----------------+-------+------------     |
   |          |    00 =     Disabled    |  High |    Off          |
   |          |    01 =     Enabled     |  Low  |    On           |
   |          |    10 =     Disabled    |  Low  |    On           |
   |          |    11 =     Disabled    |  Low  |    BRK          |
   | Bit  1   |   Receiver Interrupt: 1 = Disabled                |
   | Bit  0   |   Master IRQ Control: 1 = On                      |
   +----------+---------------------------------------------------+



 $DE03/56835/SWIFTLINK+3:   Control Register

   +----------+---------------------------------------------------+
   | Bit  7   |   Stop Bits: 1 = 2, 0 = 1 or 1.5                  |
   | Bit  6-5 |   Words: 00 = 8 Bit       10 = 6 Bit              |
   |          |          01 = 7 Bit       11 = 5 Bit              |
   | Bit  4   |   Baud Rate Generator: 1 = Internal, 0 = External |
   | Bits 3-0 |   Baud Rate: 0101 =  300 Bd      1011 =  7200 Bd  |
   |          |              0110 =  600 Bd      1100 =  9600 Bd  |
   |          |              0111 = 1200 Bd      1101 = 14400 Bd  |
   |          |              1000 = 2400 Bd      1110 = 19200 Bd  |
   |          |              1001 = 3600 Bd      1111 = 38400 Bd  |
   |          |              1010 = 4800 Bd                       |
   |          |              0000 = enable Enhanced Speed ($DE07) |
   +----------+---------------------------------------------------+



$DE07/56839/TURBO232+7:   Enhanced-Speed Register

 Turbo232 only!

   +----------+---------------------------------------------------+
   | Bit  7-3 |   Unused                                          |
   | Bit  2   |   Mode Bit (read only): 1 = Bits 0-3 of $DE03 are |
   |          |   cleared and enhaced speed is enabled            |
   | Bits 1-0 |   Enhanced Baud Rate (read only if Mode Bit = 0): |
   |          |              00 = 230400 Bd       10 = 57600 Bd   |
   |          |              01 = 115200 Bd                       |
   |          |              11 = reserved for future expansions  |
   +----------+---------------------------------------------------+