mirror of
https://github.com/holub/mame
synced 2025-04-25 17:56:43 +03:00
document flags, and fixed flags in add/sub
This commit is contained in:
Michaël Banaan Ananas
parent
6b6bd02db1
commit
a27f7ed935
@ -16,6 +16,25 @@
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#define MEM_BYTE (0)
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#define MEM_WORD (1)
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enum mn10200_flag
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{
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FLAG_ZF = 0x0001, // zero flag
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FLAG_NF = 0x0002, // negative flag
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FLAG_CF = 0x0004, // carry flag
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FLAG_VF = 0x0008, // overflow flag
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FLAG_ZX = 0x0010, // extended zero flag
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FLAG_NX = 0x0020, // extended negative flag
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FLAG_CX = 0x0040, // extended carry flag
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FLAG_VX = 0x0080, // extended overflow flag
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FLAG_IM0 = 0x0100, // interrupt mask
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FLAG_IM1 = 0x0200, // "
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FLAG_IM2 = 0x0400, // "
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FLAG_IE = 0x0800, // interrupt enable
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FLAG_S0 = 0x1000, // software bit
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FLAG_S1 = 0x2000, // software bit
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FLAG_D14 = 0x4000, // ?
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FLAG_D15 = 0x8000 // ?
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};
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const device_type MN10200 = &device_creator<mn10200_device>;
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@ -99,12 +118,12 @@ void mn10200_device::w24(offs_t adr, UINT32 val)
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void mn10200_device::mn102_change_pc(UINT32 pc)
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{
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m_pc = pc & 0xffffff;
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m_pc = pc & 0xffffff;
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}
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void mn10200_device::mn102_take_irq(int level, int group)
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{
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if(!(m_psw & 0x800))
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if(!(m_psw & FLAG_IE))
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{
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// if (group != 8) printf("MN10200: Dropping irq L %d G %d pc=%x, a3=%x\n", level, group, m_pc, m_a[3]);
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return;
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@ -396,16 +415,16 @@ void mn10200_device::state_string_export(const device_state_entry &entry, astrin
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case CPUINFO_STR_FLAGS:
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string.printf( "S=%d irq=%s im=%d %c%c%c%c %c%c%c%c",
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(m_psw >> 12) & 3,
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m_psw & 0x0800 ? "on " : "off",
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m_psw & FLAG_IE ? "on " : "off",
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(m_psw >> 8) & 7,
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m_psw & 0x0080 ? 'V' : '-',
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m_psw & 0x0040 ? 'C' : '-',
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m_psw & 0x0020 ? 'N' : '-',
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m_psw & 0x0010 ? 'Z' : '-',
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m_psw & 0x0008 ? 'v' : '-',
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m_psw & 0x0004 ? 'c' : '-',
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m_psw & 0x0002 ? 'n' : '-',
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m_psw & 0x0001 ? 'z' : '-');
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m_psw & FLAG_VX ? 'V' : '-',
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m_psw & FLAG_CX ? 'C' : '-',
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m_psw & FLAG_NX ? 'N' : '-',
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m_psw & FLAG_ZX ? 'Z' : '-',
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m_psw & FLAG_VF ? 'v' : '-',
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m_psw & FLAG_CF ? 'c' : '-',
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m_psw & FLAG_NF ? 'n' : '-',
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m_psw & FLAG_ZF ? 'z' : '-');
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break;
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}
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}
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@ -447,125 +466,107 @@ void mn10200_device::unemul()
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UINT32 mn10200_device::do_add(UINT32 a, UINT32 b)
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{
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UINT32 r24, r16;
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r24 = (a & 0xffffff) + (b & 0xffffff);
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r16 = (a & 0xffff) + (b & 0xffff);
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UINT32 r = (a & 0xffffff) + (b & 0xffffff);
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m_psw &= 0xff00;
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if((~(a^b)) & (a^r24) & 0x00800000)
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m_psw |= 0x80;
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if(r24 & 0x01000000)
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m_psw |= 0x40;
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if(r24 & 0x00800000)
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m_psw |= 0x20;
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if(!(r24 & 0x00ffffff))
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m_psw |= 0x10;
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if((~(a^b)) & (a^r16) & 0x00008000)
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m_psw |= 0x08;
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if(r16 & 0x00010000)
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m_psw |= 0x04;
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if(r16 & 0x00008000)
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m_psw |= 0x02;
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if(!(r16 & 0x0000ffff))
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m_psw |= 0x01;
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return r24 & 0xffffff;
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if((a^r) & (b^r) & 0x00800000)
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m_psw |= FLAG_VX;
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if(r & 0x01000000)
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m_psw |= FLAG_CX;
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if(r & 0x00800000)
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m_psw |= FLAG_NX;
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if((r & 0x00ffffff) == 0)
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m_psw |= FLAG_ZX;
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if((a^r) & (b^r) & 0x00008000)
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m_psw |= FLAG_VF;
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if((a^b^r) & 0x00010000)
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m_psw |= FLAG_CF;
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if(r & 0x00008000)
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m_psw |= FLAG_NF;
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if((r & 0x0000ffff) == 0)
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m_psw |= FLAG_ZF;
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return r & 0xffffff;
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}
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UINT32 mn10200_device::do_addc(UINT32 a, UINT32 b)
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{
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UINT32 r24, r16;
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r24 = (a & 0xffffff) + (b & 0xffffff);
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r16 = (a & 0xffff) + (b & 0xffff);
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if(m_psw & 0x04) {
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r24++;
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r16++;
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}
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UINT32 r = (a & 0xffffff) + (b & 0xffffff) + ((m_psw & FLAG_CF) ? 1 : 0);
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m_psw &= 0xff00;
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if((~(a^b)) & (a^r24) & 0x00800000)
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m_psw |= 0x80;
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if(r24 & 0x01000000)
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m_psw |= 0x40;
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if(r24 & 0x00800000)
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m_psw |= 0x20;
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if(!(r24 & 0x00ffffff))
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m_psw |= 0x10;
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if((~(a^b)) & (a^r16) & 0x00008000)
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m_psw |= 0x08;
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if(r16 & 0x00010000)
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m_psw |= 0x04;
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if(r16 & 0x00008000)
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m_psw |= 0x02;
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if(!(r16 & 0x0000ffff))
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m_psw |= 0x01;
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return r24 & 0xffffff;
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if((a^r) & (b^r) & 0x00800000)
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m_psw |= FLAG_VX;
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if(r & 0x01000000)
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m_psw |= FLAG_CX;
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if(r & 0x00800000)
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m_psw |= FLAG_NX;
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if((r & 0x00ffffff) == 0)
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m_psw |= FLAG_ZX;
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if((a^r) & (b^r) & 0x00008000)
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m_psw |= FLAG_VF;
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if((a^b^r) & 0x00010000)
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m_psw |= FLAG_CF;
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if(r & 0x00008000)
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m_psw |= FLAG_NF;
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if((r & 0x0000ffff) == 0)
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m_psw |= FLAG_ZF;
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return r & 0xffffff;
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}
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UINT32 mn10200_device::do_sub(UINT32 a, UINT32 b)
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{
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UINT32 r24, r16;
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r24 = (a & 0xffffff) - (b & 0xffffff);
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r16 = (a & 0xffff) - (b & 0xffff);
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UINT32 r = (a & 0xffffff) - (b & 0xffffff);
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m_psw &= 0xff00;
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if((a^b) & (a^r24) & 0x00800000)
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m_psw |= 0x80;
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if(r24 & 0x01000000)
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m_psw |= 0x40;
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if(r24 & 0x00800000)
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m_psw |= 0x20;
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if(!(r24 & 0x00ffffff))
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m_psw |= 0x10;
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if((a^b) & (a^r16) & 0x00008000)
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m_psw |= 0x08;
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if(r16 & 0x00010000)
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m_psw |= 0x04;
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if(r16 & 0x00008000)
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m_psw |= 0x02;
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if(!(r16 & 0x0000ffff))
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m_psw |= 0x01;
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return r24 & 0xffffff;
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if((a^b) & (a^r) & 0x00800000)
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m_psw |= FLAG_VX;
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if(r & 0x01000000)
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m_psw |= FLAG_CX;
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if(r & 0x00800000)
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m_psw |= FLAG_NX;
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if((r & 0x00ffffff) == 0)
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m_psw |= FLAG_ZX;
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if((a^b) & (a^r) & 0x00008000)
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m_psw |= FLAG_VF;
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if((a^b^r) & 0x00010000)
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m_psw |= FLAG_CF;
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if(r & 0x00008000)
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m_psw |= FLAG_NF;
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if((r & 0x0000ffff) == 0)
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m_psw |= FLAG_ZF;
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return r & 0xffffff;
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}
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UINT32 mn10200_device::do_subc(UINT32 a, UINT32 b)
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{
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UINT32 r24, r16;
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r24 = (a & 0xffffff) - (b & 0xffffff);
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r16 = (a & 0xffff) - (b & 0xffff);
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if(m_psw & 0x04) {
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r24--;
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r16--;
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}
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UINT32 r = (a & 0xffffff) - (b & 0xffffff) - ((m_psw & FLAG_CF) ? 1 : 0);
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m_psw &= 0xff00;
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if(r24 >= 0x00800000 && r24 < 0xff800000)
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m_psw |= 0x80;
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if(r24 & 0x01000000)
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m_psw |= 0x40;
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if(r24 & 0x00800000)
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m_psw |= 0x20;
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if(!(r24 & 0x00ffffff))
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m_psw |= 0x10;
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if(r16 >= 0x00008000 && r16 < 0xffff8000)
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m_psw |= 0x08;
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if(r16 & 0x00010000)
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m_psw |= 0x04;
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if(r16 & 0x00008000)
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m_psw |= 0x02;
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if(!(r16 & 0x0000ffff))
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m_psw |= 0x01;
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return r24 & 0xffffff;
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if((a^b) & (a^r) & 0x00800000)
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m_psw |= FLAG_VX;
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if(r & 0x01000000)
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m_psw |= FLAG_CX;
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if(r & 0x00800000)
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m_psw |= FLAG_NX;
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if((r & 0x00ffffff) == 0)
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m_psw |= FLAG_ZX;
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if((a^b) & (a^r) & 0x00008000)
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m_psw |= FLAG_VF;
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if((a^b^r) & 0x00010000)
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m_psw |= FLAG_CF;
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if(r & 0x00008000)
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m_psw |= FLAG_NF;
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if((r & 0x0000ffff) == 0)
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m_psw |= FLAG_ZF;
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return r & 0xffffff;
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}
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void mn10200_device::test_nz16(UINT16 v)
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{
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m_psw &= 0xfff0;
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if(v & 0x8000)
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m_psw |= 2;
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m_psw |= FLAG_NF;
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if(!v)
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m_psw |= 1;
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m_psw |= FLAG_ZF;
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}
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void mn10200_device::do_jsr(UINT32 to, UINT32 ret)
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@ -575,21 +576,6 @@ void mn10200_device::do_jsr(UINT32 to, UINT32 ret)
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w24(m_a[3], ret);
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}
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#if 0
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log_event("MN102", "PSW change S=%d irq=%s im=%d %c%c%c%c %c%c%c%c",
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(psw >> 12) & 3,
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psw & 0x0800 ? "on" : "off",
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(psw >> 8) & 7,
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psw & 0x0080 ? 'V' : '-',
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psw & 0x0040 ? 'C' : '-',
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psw & 0x0020 ? 'N' : '-',
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psw & 0x0010 ? 'Z' : '-',
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psw & 0x0008 ? 'v' : '-',
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psw & 0x0004 ? 'c' : '-',
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psw & 0x0002 ? 'n' : '-',
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psw & 0x0001 ? 'z' : '-');
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#endif
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// take an external IRQ
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void mn10200_device::execute_set_input(int irqnum, int state)
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{
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@ -806,7 +792,7 @@ void mn10200_device::execute_run()
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// blt label8
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case 0xe0:
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if(((m_psw & 0x0a) == 2) || ((m_psw & 0x0a) == 8))
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if(((m_psw & (FLAG_NF|FLAG_VF)) == FLAG_NF) || ((m_psw & (FLAG_NF|FLAG_VF)) == FLAG_VF)) // (VF^NF)=1
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{
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m_cycles -= 2;
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mn102_change_pc(m_pc+2+(INT8)mn102_read_byte(m_pc+1));
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@ -820,7 +806,7 @@ void mn10200_device::execute_run()
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// bgt label8
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case 0xe1:
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if(((m_psw & 0x0b) == 0) || ((m_psw & 0x0b) == 0xa))
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if(((m_psw & (FLAG_ZF|FLAG_NF|FLAG_VF)) == 0) || ((m_psw & (FLAG_ZF|FLAG_NF|FLAG_VF)) == (FLAG_NF|FLAG_VF))) // ((VF^NF)|ZF)=0
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{
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m_cycles -= 2;
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mn102_change_pc(m_pc+2+(INT8)mn102_read_byte(m_pc+1));
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@ -834,7 +820,7 @@ void mn10200_device::execute_run()
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// bge label8
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case 0xe2:
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if(((m_psw & 0x0a) == 0) || ((m_psw & 0x0a) == 0xa))
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if(((m_psw & (FLAG_NF|FLAG_VF)) == 0) || ((m_psw & (FLAG_NF|FLAG_VF)) == (FLAG_NF|FLAG_VF))) // (VF^NF)=0
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{
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m_cycles -= 2;
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mn102_change_pc(m_pc+2+(INT8)mn102_read_byte(m_pc+1));
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@ -848,21 +834,21 @@ void mn10200_device::execute_run()
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// ble label8
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case 0xe3:
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if((m_psw & 0x01) || ((m_psw & 0x0a) == 2) || ((m_psw & 0x0a) == 8))
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if((m_psw & FLAG_ZF) || ((m_psw & (FLAG_NF|FLAG_VF)) == FLAG_NF) || ((m_psw & (FLAG_NF|FLAG_VF)) == FLAG_VF)) // ((VF^NF)|ZF)=1
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{
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m_cycles -= 2;
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mn102_change_pc(m_pc+2+(INT8)mn102_read_byte(m_pc+1));
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}
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else
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{
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m_cycles -= 1;
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m_pc += 2;
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m_cycles -= 1;
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m_pc += 2;
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}
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break;
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// bcs label8
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case 0xe4:
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if(m_psw & 0x04)
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if(m_psw & FLAG_CF) // CF=1
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{
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m_cycles -= 2;
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mn102_change_pc(m_pc+2+(INT8)mn102_read_byte(m_pc+1));
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@ -876,7 +862,7 @@ void mn10200_device::execute_run()
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// bhi label8
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case 0xe5:
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if(!(m_psw & 0x05))
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if(!(m_psw & (FLAG_ZF|FLAG_CF))) // (CF|ZF)=0
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{
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m_cycles -= 2;
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mn102_change_pc(m_pc+2+(INT8)mn102_read_byte(m_pc+1));
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@ -890,7 +876,7 @@ void mn10200_device::execute_run()
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// bcc label8
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case 0xe6:
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if(!(m_psw & 0x04))
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if(!(m_psw & FLAG_CF)) // CF=0
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{
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m_cycles -= 2;
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mn102_change_pc(m_pc+2+(INT8)mn102_read_byte(m_pc+1));
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@ -904,7 +890,7 @@ void mn10200_device::execute_run()
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// bls label8
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case 0xe7:
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if(m_psw & 0x05)
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if(m_psw & (FLAG_ZF|FLAG_CF)) // (CF|ZF)=1
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{
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m_cycles -= 2;
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mn102_change_pc(m_pc+2+(INT8)mn102_read_byte(m_pc+1));
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@ -918,7 +904,7 @@ void mn10200_device::execute_run()
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// beq label8
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case 0xe8:
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if(m_psw & 0x01)
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if(m_psw & FLAG_ZF) // ZF=1
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{
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m_cycles -= 2;
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mn102_change_pc(m_pc+2+(INT8)mn102_read_byte(m_pc+1));
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@ -932,7 +918,7 @@ void mn10200_device::execute_run()
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// bne label8
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case 0xe9:
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if(!(m_psw & 0x01))
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if(!(m_psw & FLAG_ZF)) // ZF=0
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{
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m_cycles -= 2;
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mn102_change_pc(m_pc+2+(INT8)mn102_read_byte(m_pc+1));
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@ -983,9 +969,8 @@ void mn10200_device::execute_run()
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// bset dm, (an)
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case 0x20: case 0x21: case 0x22: case 0x23: case 0x24: case 0x25: case 0x26: case 0x27:
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case 0x28: case 0x29: case 0x2a: case 0x2b: case 0x2c: case 0x2d: case 0x2e: case 0x2f: {
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UINT8 v;
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m_cycles -= 5;
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v = mn102_read_byte(m_a[(opcode>>2) & 3]);
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UINT8 v = mn102_read_byte(m_a[(opcode>>2) & 3]);
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test_nz16(v & m_d[opcode & 3]);
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mn102_write_byte(m_a[(opcode>>2) & 3], v | m_d[opcode & 3]);
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m_pc += 2;
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@ -995,9 +980,8 @@ void mn10200_device::execute_run()
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// bclr dm, (an)
|
||||
case 0x30: case 0x31: case 0x32: case 0x33: case 0x34: case 0x35: case 0x36: case 0x37:
|
||||
case 0x38: case 0x39: case 0x3a: case 0x3b: case 0x3c: case 0x3d: case 0x3e: case 0x3f: {
|
||||
UINT8 v;
|
||||
m_cycles -= 5;
|
||||
v = mn102_read_byte(m_a[(opcode>>2) & 3]);
|
||||
UINT8 v = mn102_read_byte(m_a[(opcode>>2) & 3]);
|
||||
test_nz16(v & m_d[opcode & 3]);
|
||||
mn102_write_byte(m_a[(opcode>>2) & 3], v & ~m_d[opcode & 3]);
|
||||
m_pc += 2;
|
||||
@ -1227,9 +1211,9 @@ void mn10200_device::execute_run()
|
||||
case 0x30: case 0x31: case 0x32: case 0x33: {
|
||||
UINT32 d = m_d[opcode & 3];
|
||||
m_cycles -= 2;
|
||||
test_nz16(m_d[opcode & 3] = (d & 0xff0000) | ((d << 1) & 0x00fffe) | ((m_psw & 0x04) ? 1 : 0));
|
||||
test_nz16(m_d[opcode & 3] = (d & 0xff0000) | ((d << 1) & 0x00fffe) | ((m_psw & FLAG_CF) ? 1 : 0));
|
||||
if(d & 0x8000)
|
||||
m_psw |= 0x04;
|
||||
m_psw |= FLAG_CF;
|
||||
m_pc += 2;
|
||||
break;
|
||||
}
|
||||
@ -1238,9 +1222,9 @@ void mn10200_device::execute_run()
|
||||
case 0x34: case 0x35: case 0x36: case 0x37: {
|
||||
UINT32 d = m_d[opcode & 3];
|
||||
m_cycles -= 2;
|
||||
test_nz16(m_d[opcode & 3] = (d & 0xff0000) | ((d >> 1) & 0x007fff) | ((m_psw & 0x04) ? 0x8000 : 0));
|
||||
test_nz16(m_d[opcode & 3] = (d & 0xff0000) | ((d >> 1) & 0x007fff) | ((m_psw & FLAG_CF) ? 0x8000 : 0));
|
||||
if(d & 1)
|
||||
m_psw |= 0x04;
|
||||
m_psw |= FLAG_CF;
|
||||
m_pc += 2;
|
||||
break;
|
||||
}
|
||||
@ -1251,7 +1235,7 @@ void mn10200_device::execute_run()
|
||||
m_cycles -= 2;
|
||||
test_nz16(m_d[opcode & 3] = (d & 0xff8000) | ((d >> 1) & 0x007fff));
|
||||
if(d & 1)
|
||||
m_psw |= 0x04;
|
||||
m_psw |= FLAG_CF;
|
||||
m_pc += 2;
|
||||
break;
|
||||
}
|
||||
@ -1262,7 +1246,7 @@ void mn10200_device::execute_run()
|
||||
m_cycles -= 2;
|
||||
test_nz16(m_d[opcode & 3] = (d & 0xff0000) | ((d >> 1) & 0x007fff));
|
||||
if(d & 1)
|
||||
m_psw |= 0x04;
|
||||
m_psw |= FLAG_CF;
|
||||
m_pc += 2;
|
||||
break;
|
||||
}
|
||||
@ -1274,11 +1258,11 @@ void mn10200_device::execute_run()
|
||||
m_cycles -= 12;
|
||||
res = ((INT16)m_d[opcode & 3])*((INT16)m_d[(opcode>>2) & 3]);
|
||||
m_d[opcode & 3] = res & 0xffffff;
|
||||
m_psw &= 0xff00;
|
||||
m_psw &= 0xff00; // f4 is undefined
|
||||
if(res & 0x80000000)
|
||||
m_psw |= 2;
|
||||
m_psw |= FLAG_NF;
|
||||
if(!res)
|
||||
m_psw |= 1;
|
||||
m_psw |= FLAG_ZF;
|
||||
m_mdr = res >> 16;
|
||||
m_pc += 2;
|
||||
break;
|
||||
@ -1291,11 +1275,11 @@ void mn10200_device::execute_run()
|
||||
m_cycles -= 12;
|
||||
res = ((UINT16)m_d[opcode & 3])*((UINT16)m_d[(opcode>>2) & 3]);
|
||||
m_d[opcode & 3] = res & 0xffffff;
|
||||
m_psw &= 0xff00;
|
||||
m_psw &= 0xff00; // f4 is undefined
|
||||
if(res & 0x80000000)
|
||||
m_psw |= 2;
|
||||
m_psw |= FLAG_NF;
|
||||
if(!res)
|
||||
m_psw |= 1;
|
||||
m_psw |= FLAG_ZF;
|
||||
m_mdr = res >> 16;
|
||||
m_pc += 2;
|
||||
break;
|
||||
@ -1307,26 +1291,30 @@ void mn10200_device::execute_run()
|
||||
UINT32 n, d, q, r;
|
||||
m_cycles -= 13;
|
||||
m_pc += 2;
|
||||
m_psw &= 0xff00;
|
||||
m_psw &= 0xff00; // f7 may be undefined
|
||||
|
||||
n = (m_mdr<<16)|(UINT16)m_d[opcode & 3];
|
||||
d = (UINT16)m_d[(opcode>>2) & 3];
|
||||
if(!d) {
|
||||
m_psw |= 8;
|
||||
break;
|
||||
if(!d)
|
||||
{
|
||||
// divide by 0
|
||||
m_psw |= FLAG_VF;
|
||||
break;
|
||||
}
|
||||
q = n/d;
|
||||
r = n%d;
|
||||
if(q >= 0x10000) {
|
||||
m_psw |= 8;
|
||||
break;
|
||||
if(q >= 0x10000)
|
||||
{
|
||||
// overflow (Dm and MDR are undefined)
|
||||
m_psw |= FLAG_VF;
|
||||
break;
|
||||
}
|
||||
m_d[opcode & 3] = q;
|
||||
m_mdr = r;
|
||||
if(!q)
|
||||
m_psw |= 0x11;
|
||||
m_psw |= FLAG_ZF|FLAG_ZX;
|
||||
if(q & 0x8000)
|
||||
m_psw |= 2;
|
||||
m_psw |= FLAG_NF;
|
||||
break;
|
||||
}
|
||||
|
||||
@ -1657,122 +1645,155 @@ void mn10200_device::execute_run()
|
||||
|
||||
// bltx label8
|
||||
case 0xe0:
|
||||
if(((m_psw & 0xa0) == 0x20) || ((m_psw & 0xa0) == 0x80)) {
|
||||
m_cycles -= 3;
|
||||
mn102_change_pc(m_pc+3+(INT8)mn102_read_byte(m_pc+2));
|
||||
} else {
|
||||
m_cycles -= 2;
|
||||
m_pc += 3;
|
||||
if(((m_psw & (FLAG_NX|FLAG_VX)) == FLAG_NX) || ((m_psw & (FLAG_NX|FLAG_VX)) == FLAG_VX)) // (VX^NX)=1
|
||||
{
|
||||
m_cycles -= 3;
|
||||
mn102_change_pc(m_pc+3+(INT8)mn102_read_byte(m_pc+2));
|
||||
}
|
||||
else
|
||||
{
|
||||
m_cycles -= 2;
|
||||
m_pc += 3;
|
||||
}
|
||||
break;
|
||||
|
||||
// bgtx label8
|
||||
case 0xe1:
|
||||
if(((m_psw & 0xb0) == 0) || ((m_psw & 0xb0) == 0xa0)) {
|
||||
m_cycles -= 3;
|
||||
mn102_change_pc(m_pc+3+(INT8)mn102_read_byte(m_pc+2));
|
||||
} else {
|
||||
m_cycles -= 2;
|
||||
m_pc += 3;
|
||||
if(((m_psw & (FLAG_ZX|FLAG_NX|FLAG_VX)) == 0) || ((m_psw & (FLAG_ZX|FLAG_NX|FLAG_VX)) == (FLAG_NX|FLAG_VX))) // ((VX^NX)|ZX)=0
|
||||
{
|
||||
m_cycles -= 3;
|
||||
mn102_change_pc(m_pc+3+(INT8)mn102_read_byte(m_pc+2));
|
||||
}
|
||||
else
|
||||
{
|
||||
m_cycles -= 2;
|
||||
m_pc += 3;
|
||||
}
|
||||
break;
|
||||
|
||||
// bgex label8
|
||||
case 0xe2:
|
||||
if(((m_psw & 0xa0) == 0) || ((m_psw & 0xa0) == 0xa0)) {
|
||||
m_cycles -= 3;
|
||||
mn102_change_pc(m_pc+3+(INT8)mn102_read_byte(m_pc+2));
|
||||
} else {
|
||||
m_cycles -= 2;
|
||||
m_pc += 3;
|
||||
if(((m_psw & (FLAG_NX|FLAG_VX)) == 0) || ((m_psw & (FLAG_NX|FLAG_VX)) == (FLAG_NX|FLAG_VX))) // (VX^NX)=0
|
||||
{
|
||||
m_cycles -= 3;
|
||||
mn102_change_pc(m_pc+3+(INT8)mn102_read_byte(m_pc+2));
|
||||
}
|
||||
else
|
||||
{
|
||||
m_cycles -= 2;
|
||||
m_pc += 3;
|
||||
}
|
||||
break;
|
||||
|
||||
// blex label8
|
||||
case 0xe3:
|
||||
if((m_psw & 0x10) || ((m_psw & 0xa0) == 0x20) || ((m_psw & 0xa0) == 0x80)) {
|
||||
m_cycles -= 3;
|
||||
mn102_change_pc(m_pc+3+(INT8)mn102_read_byte(m_pc+2));
|
||||
} else {
|
||||
m_cycles -= 2;
|
||||
m_pc += 3;
|
||||
if((m_psw & FLAG_ZX) || ((m_psw & (FLAG_NX|FLAG_VX)) == FLAG_NX) || ((m_psw & (FLAG_NX|FLAG_VX)) == FLAG_VX)) // ((VX^NX)|ZX)=1
|
||||
{
|
||||
m_cycles -= 3;
|
||||
mn102_change_pc(m_pc+3+(INT8)mn102_read_byte(m_pc+2));
|
||||
}
|
||||
else
|
||||
{
|
||||
m_cycles -= 2;
|
||||
m_pc += 3;
|
||||
}
|
||||
break;
|
||||
|
||||
// bcsx label8
|
||||
case 0xe4:
|
||||
if(m_psw & 0x40) {
|
||||
m_cycles -= 3;
|
||||
mn102_change_pc(m_pc+3+(INT8)mn102_read_byte(m_pc+2));
|
||||
} else {
|
||||
m_cycles -= 2;
|
||||
m_pc += 3;
|
||||
if(m_psw & FLAG_CX) // CX=1
|
||||
{
|
||||
m_cycles -= 3;
|
||||
mn102_change_pc(m_pc+3+(INT8)mn102_read_byte(m_pc+2));
|
||||
}
|
||||
else
|
||||
{
|
||||
m_cycles -= 2;
|
||||
m_pc += 3;
|
||||
}
|
||||
break;
|
||||
|
||||
// bhix label8
|
||||
case 0xe5:
|
||||
if(!(m_psw & 0x50)) {
|
||||
m_cycles -= 3;
|
||||
mn102_change_pc(m_pc+3+(INT8)mn102_read_byte(m_pc+2));
|
||||
} else {
|
||||
m_cycles -= 2;
|
||||
m_pc += 3;
|
||||
if(!(m_psw & (FLAG_ZX|FLAG_CX))) // (CX|ZX)=0
|
||||
{
|
||||
m_cycles -= 3;
|
||||
mn102_change_pc(m_pc+3+(INT8)mn102_read_byte(m_pc+2));
|
||||
}
|
||||
else
|
||||
{
|
||||
m_cycles -= 2;
|
||||
m_pc += 3;
|
||||
}
|
||||
break;
|
||||
|
||||
// bccx label8
|
||||
case 0xe6:
|
||||
if(!(m_psw & 0x40)) {
|
||||
m_cycles -= 3;
|
||||
mn102_change_pc(m_pc+3+(INT8)mn102_read_byte(m_pc+2));
|
||||
} else {
|
||||
m_cycles -= 2;
|
||||
m_pc += 3;
|
||||
if(!(m_psw & FLAG_CX)) // CX=0
|
||||
{
|
||||
m_cycles -= 3;
|
||||
mn102_change_pc(m_pc+3+(INT8)mn102_read_byte(m_pc+2));
|
||||
}
|
||||
else
|
||||
{
|
||||
m_cycles -= 2;
|
||||
m_pc += 3;
|
||||
}
|
||||
break;
|
||||
|
||||
// blsx label8
|
||||
case 0xe7:
|
||||
if(m_psw & 0x50) {
|
||||
m_cycles -= 3;
|
||||
mn102_change_pc(m_pc+3+(INT8)mn102_read_byte(m_pc+2));
|
||||
} else {
|
||||
m_cycles -= 2;
|
||||
m_pc += 3;
|
||||
if(m_psw & (FLAG_ZX|FLAG_CX)) // (CX|ZX)=1
|
||||
{
|
||||
m_cycles -= 3;
|
||||
mn102_change_pc(m_pc+3+(INT8)mn102_read_byte(m_pc+2));
|
||||
}
|
||||
else
|
||||
{
|
||||
m_cycles -= 2;
|
||||
m_pc += 3;
|
||||
}
|
||||
break;
|
||||
|
||||
// beqx label8
|
||||
case 0xe8:
|
||||
if(m_psw & 0x10) {
|
||||
m_cycles -= 3;
|
||||
mn102_change_pc(m_pc+3+(INT8)mn102_read_byte(m_pc+2));
|
||||
} else {
|
||||
m_cycles -= 2;
|
||||
m_pc += 3;
|
||||
if(m_psw & FLAG_ZX) // ZX=1
|
||||
{
|
||||
m_cycles -= 3;
|
||||
mn102_change_pc(m_pc+3+(INT8)mn102_read_byte(m_pc+2));
|
||||
}
|
||||
else
|
||||
{
|
||||
m_cycles -= 2;
|
||||
m_pc += 3;
|
||||
}
|
||||
break;
|
||||
|
||||
// bnex label8
|
||||
case 0xe9:
|
||||
if(!(m_psw & 0x10)) {
|
||||
m_cycles -= 3;
|
||||
mn102_change_pc(m_pc+3+(INT8)mn102_read_byte(m_pc+2));
|
||||
} else {
|
||||
m_cycles -= 2;
|
||||
m_pc += 3;
|
||||
if(!(m_psw & FLAG_ZX)) // ZX=0
|
||||
{
|
||||
m_cycles -= 3;
|
||||
mn102_change_pc(m_pc+3+(INT8)mn102_read_byte(m_pc+2));
|
||||
}
|
||||
else
|
||||
{
|
||||
m_cycles -= 2;
|
||||
m_pc += 3;
|
||||
}
|
||||
break;
|
||||
|
||||
// bnc label8
|
||||
case 0xfe:
|
||||
if(!(m_psw & 0x02)) {
|
||||
m_cycles -= 3;
|
||||
mn102_change_pc(m_pc+3+(INT8)mn102_read_byte(m_pc+2));
|
||||
} else {
|
||||
m_cycles -= 2;
|
||||
m_pc += 3;
|
||||
if(!(m_psw & FLAG_NF)) // NF=0
|
||||
{
|
||||
m_cycles -= 3;
|
||||
mn102_change_pc(m_pc+3+(INT8)mn102_read_byte(m_pc+2));
|
||||
}
|
||||
else
|
||||
{
|
||||
m_cycles -= 2;
|
||||
m_pc += 3;
|
||||
}
|
||||
break;
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user