Turbo232 Swiftlink Registers.txt
From ReplayResources
Jump to navigationJump to search
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 |
+----------+---------------------------------------------------+
