/**
* Intercept GEMDOS calls.
* Used for GEMDOS HD emulation (see gemdos.c).
*/
unsigned long OpCode_GemDos(uae_u32 opcode)
{
GemDOS_OpCode(); /* handler code in gemdos.c */
m68k_incpc(2);
fill_prefetch_0();
return 4;
}
/**
* Intercept GEMDOS calls.
* Used for GEMDOS HD emulation (see gemdos.c).
*/
unsigned long OpCode_GemDos(uae_u32 opcode)
{
GemDOS_OpCode(); /* handler code in gemdos.c */
m68k_incpc(2);
regs.ir = regs.irc;
get_word_prefetch(2);
return 4 * CYCLE_UNIT / 2;
}
/**
* Emulator Native Features ID opcode interception.
*/
unsigned long OpCode_NatFeat_ID(uae_u32 opcode)
{
Uint32 stack = Regs[REG_A7] + SIZE_LONG; /* skip return address */
Uint16 SR = M68000_GetSR();
if (NatFeat_ID(stack, &(Regs[REG_D0]))) {
m68k_incpc(2);
regs.ir = regs.irc;
get_word_prefetch(2);
}
return 4 * CYCLE_UNIT / 2;
}
/**
* Emulator Native Features call opcode interception.
*/
unsigned long OpCode_NatFeat_Call(uae_u32 opcode)
{
Uint32 stack = Regs[REG_A7] + SIZE_LONG; /* skip return address */
Uint16 SR = M68000_GetSR();
bool super;
super = ((SR & SR_SUPERMODE) == SR_SUPERMODE);
if (NatFeat_Call(stack, super, &(Regs[REG_D0]))) {
m68k_incpc(2);
regs.ir = regs.irc;
get_word_prefetch(2);
}
return 4 * CYCLE_UNIT / 2;
}
/**
* This function will be called at system init by the cartridge routine
* (after gemdos init, before booting floppies).
* The GEMDOS vector (#$84) is setup and we also initialize the connected
* drive mask and Line-A variables (for an extended VDI resolution) from here.
*/
unsigned long OpCode_SysInit(uae_u32 opcode)
{
/* Add any drives mapped by TOS in the interim */
ConnectedDriveMask |= STMemory_ReadLong(0x4c2);
/* Initialize the connected drive mask */
STMemory_WriteLong(0x4c2, ConnectedDriveMask);
if (!bInitGemDOS)
{
/* Init on boot - see cart.c */
GemDOS_Boot();
/* Update LineA for extended VDI res
* D0: LineA base, A1: Font base
*/
VDI_LineA(regs.regs[0], regs.regs[9]);
}
m68k_incpc(2);
fill_prefetch_0();
return 4;
}