Subversion Repositories tv80

//

// Copyright (c) 2005 Guy Hutchison (ghutchis@opencores.org)

//

// Permission is hereby granted, free of charge, to any person obtaining a 

// copy of this software and associated documentation files (the "Software"), 

// to deal in the Software without restriction, including without limitation 

// the rights to use, copy, modify, merge, publish, distribute, sublicense, 

// and/or sell copies of the Software, and to permit persons to whom the 

// Software is furnished to do so, subject to the following conditions:

//

// The above copyright notice and this permission notice shall be included 

// in all copies or substantial portions of the Software.

//

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 

// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 

// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 

// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 

// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 

// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 

// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

//

// Environment library

// Creates definitions of the special I/O ports used by the

// environment, as well as some utility functions to allow

// programs to print out strings in the test log.

#ifndef TV80_ENV_H

#define TV80_ENV_H

sfr at 0x80 sim_ctl_port;

sfr at 0x81 msg_port;

sfr at 0x82 timeout_port;

sfr at 0x83 max_timeout_low;

sfr at 0x84 max_timeout_high;

sfr at 0x90 intr_cntdwn;

sfr at 0x91 cksum_value;

sfr at 0x92 cksum_accum;

sfr at 0x93 inc_on_read;

sfr at 0x94 randval;

sfr at 0x95 nmi_cntdwn;

sfr at 0xA0 nmi_trig_opcode;

#define SC_TEST_PASSED 0x01

#define SC_TEST_FAILED 0x02

#define SC_DUMPON      0x03

#define SC_DUMPOFF     0x04

void print (char *string)

{

  char *iter;

  char timeout;

  timeout = timeout_port;

  timeout_port = 0x02;

  timeout_port = timeout;

  iter = string;

  while (*iter != 0) {

    msg_port = *iter++;

  }

}

void print_hex (unsigned int num)

{

  char i, digit;

  for (i=3; i>=0; i--) {

    digit = (num >> (i*4)) & 0xf;

    if (digit < 10) msg_port = digit + '0';

    else msg_port = digit + 'a' - 10;

  }

}

void print_num (int num)

{

  char cd = 0;

  int i;

  char digits[8];

  char timeout;

  timeout = timeout_port;

  timeout_port = 0x02;

  timeout_port = timeout;

  if (num == 0) { msg_port = '0'; return; }

  while (num > 0) {

    digits[cd++] = (num % 10) + '0';

    num /= 10;

  }

  for (i=cd; i>0; i--)

    msg_port = digits[i-1];

}

#define sim_ctl(code) sim_ctl_port = code

void set_timeout (unsigned int max_timeout)

{

  timeout_port = 0x02;

  max_timeout_low = (max_timeout & 0xFF);

  max_timeout_high = (max_timeout >> 8);

  timeout_port = 0x01;

}

#endif