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GetTrapAddress (deprecated) support

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This commit is contained in:
Kelvin Sherlock 2015-02-28 12:00:43 -05:00
parent 97f7e734bb
commit c17dd4f400
1 changed files with 65 additions and 0 deletions
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65
toolbox/dispatch.cpp
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@ -224,6 +224,67 @@ namespace OS {
return 0;
}
uint16_t GetTrapAddress(uint16_t trap)
{
// FUNCTION GetTrapAddress (trapNum: Integer) :LongInt;
/*
* on entry:
* D0 An A-line trap word
*
* on exit:
* A0 Address of next routine in the daisy chain (a system software routine or a patch)
*/
/*
* The GetTrapAddress function was used when both the Operating
* System trap addresses and Toolbox trap addresses were located
* in the same trap dispatch table. Today, any system software
* routine with the trap number $00 to $4F, $54, or $57 is drawn
* from the Operating System dispatch table; any other software
* routine is taken from the Toolbox dispatch table.
*/
uint16_t trapNumber = cpuGetDReg(0);
const char *trapName = TrapName(trapNumber | 0xa000);
if (!trapName) trapName = "Unknown";
Log("%04x GetTrapAddress($%04x (%s))\n", trap, trapNumber, trapName);
trapNumber &= 0x03ff;
bool os = false;
if (trapNumber >= 0x00 && trapNumber <= 0x4f) os = true;
if (trapNumber >= 0x54 && trapNumber <= 0x57) os = true;
if (os)
{
if (os_address[trapNumber])
{
cpuSetAReg(0, os_address[trapNumber]);
return 0;
}
cpuSetAReg(0, OSGlue + trapNumber * 4);
return 0;
}
else
{
if (trap_address[trapNumber])
{
cpuSetAReg(0, trap_address[trapNumber]);
return 0;
}
cpuSetAReg(0, ToolGlue + trapNumber * 4);
return 0;
}
}
uint16_t OSDispatch(uint16_t trap)
{
@ -564,6 +625,10 @@ namespace ToolBox {
break;
case 0xa146:
d0 = OS::GetTrapAddress(trap);
break;
case 0xA746:
d0 = OS::GetToolTrapAddress(trap);
break;