5 * This work is licensed under the terms of MAME license.
6 * See COPYING file in the top-level directory.
9 #include "../pico_int.h"
12 unsigned int SekCycleCntS68k;
13 unsigned int SekCycleAimS68k;
19 struct Cyclone PicoCpuCS68k;
23 m68ki_cpu_core PicoCpuMS68k;
27 M68K_CONTEXT PicoCpuFS68k;
31 static int new_irq_level(int level)
33 int level_new = 0, irqs;
34 Pico_mcd->m.s68k_pend_ints &= ~(1 << level);
35 if (level == 2) // clear pending bit
36 Pico_mcd->m.state_flags &= ~PCD_ST_S68K_IFL2;
37 irqs = Pico_mcd->m.s68k_pend_ints;
38 irqs &= Pico_mcd->s68k_regs[0x33];
39 while ((irqs >>= 1)) level_new++;
45 // interrupt acknowledgement
46 static int SekIntAckS68k(int level)
48 int level_new = new_irq_level(level);
50 elprintf(EL_INTS, "s68kACK %i -> %i", level, level_new);
51 PicoCpuCS68k.irq = level_new;
52 return CYCLONE_INT_ACK_AUTOVECTOR;
55 static void SekResetAckS68k(void)
57 elprintf(EL_ANOMALY, "s68k: Reset encountered @ %06x", SekPcS68k);
60 static int SekUnrecognizedOpcodeS68k(void)
62 elprintf(EL_ANOMALY, "Unrecognized Opcode @ %06x", SekPcS68k);
69 static int SekIntAckMS68k(int level)
71 #ifndef EMU_CORE_DEBUG
72 int level_new = new_irq_level(level);
73 elprintf(EL_INTS, "s68kACK %i -> %i", level, level_new);
74 CPU_INT_LEVEL = level_new << 8;
78 return M68K_INT_ACK_AUTOVECTOR;
83 static void SekIntAckFS68k(unsigned level)
85 int level_new = new_irq_level(level);
86 elprintf(EL_INTS, "s68kACK %i -> %i", level, level_new);
87 #ifndef EMU_CORE_DEBUG
88 PicoCpuFS68k.interrupts[0] = level_new;
91 extern int dbg_irq_level_sub;
92 dbg_irq_level_sub = level_new;
93 PicoCpuFS68k.interrupts[0] = 0;
100 PICO_INTERNAL void SekInitS68k(void)
104 memset(&PicoCpuCS68k,0,sizeof(PicoCpuCS68k));
105 PicoCpuCS68k.IrqCallback=SekIntAckS68k;
106 PicoCpuCS68k.ResetCallback=SekResetAckS68k;
107 PicoCpuCS68k.UnrecognizedCallback=SekUnrecognizedOpcodeS68k;
111 // Musashi is not very context friendly..
112 void *oldcontext = m68ki_cpu_p;
113 m68k_set_context(&PicoCpuMS68k);
114 m68k_set_cpu_type(M68K_CPU_TYPE_68000);
116 m68k_set_int_ack_callback(SekIntAckMS68k);
117 // m68k_pulse_reset(); // not yet, memmap is not set up
118 m68k_set_context(oldcontext);
122 memset(&PicoCpuFS68k, 0, sizeof(PicoCpuFS68k));
124 PicoCpuFS68k.iack_handler = SekIntAckFS68k;
125 PicoCpuFS68k.sr = 0x2704; // Z flag
130 PICO_INTERNAL int SekResetS68k(void)
132 if (Pico.rom==NULL) return 1;
135 CycloneReset(&PicoCpuCS68k);
139 void *oldcontext = m68ki_cpu_p;
141 m68k_set_context(&PicoCpuMS68k);
145 m68k_set_context(oldcontext);
149 fm68k_reset(&PicoCpuFS68k);
155 PICO_INTERNAL int SekInterruptS68k(int irq)
157 int irqs, real_irq = 1;
158 Pico_mcd->m.s68k_pend_ints |= 1 << irq;
159 irqs = Pico_mcd->m.s68k_pend_ints >> 1;
160 while ((irqs >>= 1)) real_irq++;
162 #ifdef EMU_CORE_DEBUG
164 extern int dbg_irq_level_sub;
165 dbg_irq_level_sub=real_irq;
170 PicoCpuCS68k.irq=real_irq;
173 // avoid m68k_set_irq() for delaying to work
174 PicoCpuMS68k.int_level = real_irq << 8;
177 PicoCpuFS68k.interrupts[0]=real_irq;
182 void SekInterruptClearS68k(int irq)
184 int level_new = new_irq_level(irq);
187 PicoCpuCS68k.irq = level_new;
190 CPU_INT_LEVEL = level_new << 8;
193 PicoCpuFS68k.interrupts[0] = level_new;