Adding a DOS port to run on x86 single board computer.

2007-12-06 22:31:14 +00:00
parent af373fbbfe
commit 64e9b54dbd
23 changed files with 2838 additions and 46 deletions
@@ -0,0 +1,106 @@
+/*
+----------------------------------------------------+
+|               Thunderbird Software                 |
+----------------------------------------------------+
+| Filespec  :  Serial.c                              |
+| Date      :  October 24, 1991                      |
+| Time      :  15:03                                 |
+| Revision  :  1.1                                   |
+| Update    : August 29, 1994                        |
+| Update    : March 12, 1995 by Bob Stout            |
+----------------------------------------------------+
+| Programmer:  Scott Andrews                         |
+| Address   :  5358 Summit RD SW                     |
+| City/State:  Pataskala, Ohio                       |
+| Zip       :  43062                                 |
+----------------------------------------------------+
+| Released to the Public Domain                      |
+----------------------------------------------------+
+*/
+
+#ifndef SERIAL__H
+#define SERIAL__H
+
+#include "extkword.h"
+#include "pchwio.h"
+
+#define  SerInBufSize  4096            /* Size of input buffer          */
+#define  SerOutBufSize 512             /* Size of output buffer         */
+
+/* 8250 registers */
+
+#define  REC             0             /* Uart receive reg.             */
+#define  XMIT            0             /* Uart transmit reg.            */
+#define  INT_EN          1             /* Uart int. enable reg.         */
+#define  INT_ID          2             /* Uart int. ident. reg.         */
+#define  LINE_CNTRL      3             /* Uart line control reg.        */
+#define  MODEM_CNTRL     4             /* Uart modem control reg.       */
+#define  LINE_STATUS     5             /* Uart line status reg.         */
+#define  MODEM_STATUS    6             /* Uart modem status reg.        */
+#define  BAUD_LSB        0             /* Uart baud divisor reg.        */
+#define  BAUD_MSB        1             /* Uart baud divisor reg.        */
+
+#define  NONE            0             /* Handshake param none          */
+#define  HDW             1             /* Handshake param hardware      */
+#define  XON             2             /* Handshake param software      */
+
+/* Interrupt enable register  */
+
+#define  RX_INT          0x01          /* Receive interrupt mask        */
+#define  TBE_INT         0x02          /* Transmit buffer empty mask    */
+#define  ERR_INT         0x04          /* Error interrupt mask          */
+#define  RS_INT          0x08          /* Line interrupt mask           */
+
+/* Interrupt id register      */
+
+#define  OUT2            0x08          /* Out 2 line                    */
+#define  DTR             0x01          /* DTR high                      */
+#define  RTS             0x02          /* RTS high                      */
+#define  CTS             0x10
+#define  DSR             0x20
+#define  XMTRDY          0x20
+#define  TXR             0       /*  Transmit register (WRITE)          */
+
+#if !defined TRUE                      /* Define boolean true/false     */
+#define  FALSE  0
+#define  TRUE   !FALSE
+#endif
+
+extern void (INTERRUPT FAR *oldvector_serial )( void);
+
+extern int   ComBase;                  /* Comm port address             */
+extern int   IrqNum;                   /* Comm interrupt request        */
+
+typedef struct                         /* Save existing comm params     */
+{  int int_enable;                     /* old interrupt enable reg value*/
+   int line;                           /*  "  line control      "    "  */
+   int modem;                          /* old modem control     "    "  */
+   int baud_lsb;                       /* old baud rate divisor LSD     */
+   int baud_msb;                       /*  "   "    "      "    MSD     */
+   int int_cntrl;                      /* old PIC interrupt reg value   */
+} OLD_COMM_PARAMS;
+extern OLD_COMM_PARAMS old_comm_params;
+
+typedef struct
+{  int line;                           /* Uart line status reg.         */
+   int modem;                          /* Uart mode status reg.         */
+   int intrupt;                        /* Uart interrupt reg.           */
+   int handshake;                      /* Handshake status              */
+} COMM_STATUS;                         /* status, updated, handler      */
+extern COMM_STATUS comm_status;
+
+int   OpenComPort ( char Port );         /*setup comm for usage         */
+void  InitComPort ( char Baud[], char Databits, char Parity, char Stop );
+void  CloseComPort ( void );             /* Restore comm port           */
+void  DropDtr ( void );                  /* Lower DTR                   */
+void  RaiseDtr ( void );                 /* Raise DTR                   */
+int   ComRecChar ( void );               /* Fetch character from rcv buf*/
+
+int   ComSendChar ( char character );    /* Put char into xmit buffer   */
+int   ComSendString ( char *string );
+int   ComStatus ( void );                /* Fetch comm status           */
+void  INTERRUPT FAR serial ( void );     /* interrupt handler           */
+
+/* End of Serial.H */
+
+#endif /* SERIAL__H */