yagsdisasm/Personality/Personality_AppleIIGS.php
2016-05-27 17:42:24 -04:00

214 lines
5.3 KiB
PHP

<?php
/**
* Personality_AppleIIGS - Handle things specific to the Apple IIGS computer (for auto-documentation)
*/
class Personality_AppleIIGS
{
private $inside_prodos = 0;
private $inside_prodos16 = 0;
private $inside_smartport = 0;
/**
* getlines( $fp, $numlines ) - Parse some lines out of the NiftyList file
*
* @param $fp res, $numlines int
* @return array
*/
private function getlines( $fp, $numlines )
{
$retarr = array();
for($x=0;$x<$numlines;$x++)
{
$line = trim( fgets( $fp ));
$addr = substr( $line, 0, 4 );
$data = substr( $line, 5 );
$retarr[$addr] = $data;
}
return $retarr;
}
public function __construct()
{
$fp = fopen( 'NList.Data.TXT', 'r' );
if( !$fp )
{
throw new Exception( "Personality_AppleIIGS: Couldn't open NiftyList data file" );
}
// parse some stuff out of the NiftyList data file
$throwaway = $this->getlines( $fp, 4 );
$this->nlist_prodos8 = $this->getlines( $fp, 33-5+1 );
$throwaway = $this->getlines( $fp, 1 );
$this->nlist_prodos16 = $this->getlines( $fp, 151-35+1 );
$throwaway = $this->getlines( $fp, 1 );
$this->nlist_toolbox = $this->getlines( $fp, 1544-153+1 );
$throwaway = $this->getlines( $fp, 1 );
$this->nlist_e1xxxx = $this->getlines( $fp, 1620-1546+1 );
$throwaway = $this->getlines( $fp, 1 );
$this->nlist_e0xxxx = $this->getlines( $fp, 1637-1622+1 );
$throwaway = $this->getlines( $fp, 1 );
$this->nlist_ssf8rom = $this->getlines( $fp, 1911-1639+1 );
}
/**
* check( $last_instruction, $this_instruction ) - Check if something comment-worthy has occurred
* (after instruction decoding)
*
* @param $last_instruction str, $this_isntruction str
* @return mixed
*/
public function check( $last_instruction, $this_instruction, $disasm )
{
$comment = false;
// m/x/e flags
if( $this_instruction == 'XCE' )
{
if( $last_instruction == 'CLC' )
{
$disasm->clear_e_flag();
}
if( $last_instruction == 'SEC' )
{
$disasm->set_e_flag();
}
}
$opcode = substr( $this_instruction, 0, 3 );
if( in_array( $opcode, array( 'REP', 'SEP' )))
{
$cpu_flags = substr( $this_instruction, -2 );
// 0x10 - index flags (X status register)
if( $cpu_flags && 0x10 )
{
if( $opcode == 'REP' )
{
$disasm->clear_x_flag();
} else {
$disasm->set_x_flag();
}
}
// 0x40 - accumulator (M status register)
if( $cpu_flags && 0x40 )
{
if( $opcode == 'REP' )
{
$disasm->clear_m_flag();
} else {
$disasm->set_m_flag();
}
}
}
// SmartPort
if( $this->inside_smartport > 0 )
{
if( $this->inside_smartport == 1 )
{
$comment = 'Pointer to parameters';
$this->inside_smartport -= 1;
} else {
$call_number = substr( $this_instruction, -2 );
$comment = 'Call Number';
// TODO extended smartport call support is broke
if( substr( $call_number, 0, 1 ) == '4' )
{
// extended smartport call: address param is long
$disasm->do_raw_bytes( array(4) );
} else {
// non-extended smartport call: address param is 16 bits
$disasm->do_raw_bytes( array(2) );
}
$this->inside_smartport -= 1;
}
}
if( in_array( $this_instruction, array( 'JSR C50D', 'JSR C50A', 'JSR C70D', 'JSR C70A' )))
{
$this->inside_smartport = 2;
$disasm->do_raw_bytes( array(1,2) );
$comment = 'SmartPort Entry';
}
// ProDOS 8
if( $this->inside_prodos > 0 )
{
if( $this->inside_prodos == 1 )
{
$comment = 'Pointer to parameters';
$this->inside_prodos -= 1;
} else {
$call_number = substr( $this_instruction, -2 );
$comment = $this->nlist_prodos8[$call_number];
$this->inside_prodos -= 1;
}
}
if( $this_instruction == 'JSR BF00' )
{
$this->inside_prodos = 2;
$disasm->do_raw_bytes( array(1,2) );
$comment = 'ProDOS 8 MLI';
}
// ProDOS 16 / GS/OS inline
if( $this->inside_gsos > 0 )
{
if( $this->inside_gsos == 1 )
{
$comment = 'Pointer to parameters';
$this->inside_gsos -= 1;
} else {
$call_number = substr( $this_instruction, -4 );
$comment = $this->nlist_prodos16[$call_number];
$this->inside_gsos -= 1;
}
}
if( $this_instruction == 'JSL E100A8' )
{
$this->inside_gsos = 2;
$disasm->do_raw_bytes( array(2,4) );
$comment = 'GS/OS In-Line MLI';
}
// softswitches and 8-bit firmware
$addr_part = substr( $this_instruction, -5 );
if( $addr_part[0] == ' ' )
{
if( $this->nlist_ssf8rom[substr($addr_part,1)] )
{
$comment = $this->nlist_ssf8rom[substr($addr_part,1)];
}
}
// E1xxxx vectors
$parts = explode( ' ', $this_instruction );
if(( $parts[1] ) && ( strlen( $parts[1] ) == 6 ) && ( substr( $parts[1], 0, 2 ) == 'E1' ))
{
$vector = substr( $parts[1], -4 );
$comment = $this->nlist_e1xxxx[$vector];
}
// E0xxxx vectors
if(( $parts[1] ) && ( strlen( $parts[1] ) == 6 ) && ( substr( $parts[1], 0, 2 ) == 'E0' ))
{
$vector = substr( $parts[1], -4 );
$comment = $this->nlist_e0xxxx[$vector];
}
// toolbox entry
if( $this_instruction == 'JSL E10000' )
{
if( substr( $last_instruction, 0, 3 ) == 'LDX' )
{
$toolcall_number = substr( $last_instruction, -4 );
if( $this->nlist_toolbox[$toolcall_number] )
{
$comment = 'Toolbox: '.$this->nlist_toolbox[$toolcall_number];
}
}
}
return $comment;
}
}