diff options
Diffstat (limited to 'src/emu/cpu/upd7725/upd7725.c')
-rwxr-xr-x | src/emu/cpu/upd7725/upd7725.c | 32 |
1 files changed, 16 insertions, 16 deletions
diff --git a/src/emu/cpu/upd7725/upd7725.c b/src/emu/cpu/upd7725/upd7725.c index 9f3d245c791..ec691b41eda 100755 --- a/src/emu/cpu/upd7725/upd7725.c +++ b/src/emu/cpu/upd7725/upd7725.c @@ -3,10 +3,10 @@ upd7725.c Core implementation for the portable NEC uPD7725/uPD96050 emulator - + Original by byuu in the public domain. MAME conversion by R. Belmont - + ****************************************************************************/ #include "emu.h" @@ -246,7 +246,7 @@ void necdsp_device::device_start() void necdsp_device::device_reset() { - for (unsigned i = 0; i < 2048; i++) + for (unsigned i = 0; i < 2048; i++) { dataRAM[i] = 0x0000; } @@ -335,7 +335,7 @@ offs_t necdsp_device::disasm_disassemble(char *buffer, offs_t pc, const UINT8 *o return CPU_DISASSEMBLE_NAME(upd7725)(NULL, buffer, pc, oprom, opram, 0); } -void necdsp_device::execute_run() +void necdsp_device::execute_run() { UINT32 opcode; @@ -356,7 +356,7 @@ void necdsp_device::execute_run() case 2: exec_jp(opcode); break; case 3: exec_ld(opcode); break; } - + INT32 result = (INT32)regs.k * regs.l; //sign + 30-bit result regs.m = result >> 15; //store sign + top 15-bits regs.n = result << 1; //store low 15-bits + zero @@ -584,12 +584,12 @@ void necdsp_device::exec_ld(UINT32 opcode) { } UINT8 necdsp_device::snesdsp_read(bool mode) { - + if (!mode) { return regs.sr >> 8; } - + if (regs.sr.drc == 0) { //16-bit @@ -597,14 +597,14 @@ UINT8 necdsp_device::snesdsp_read(bool mode) { { regs.sr.drs = 1; return regs.dr >> 0; - } - else + } + else { regs.sr.rqm = 0; regs.sr.drs = 0; return regs.dr >> 8; } - } + } else { //8-bit @@ -615,23 +615,23 @@ UINT8 necdsp_device::snesdsp_read(bool mode) { void necdsp_device::snesdsp_write(bool mode, UINT8 data) { if (!mode) return; - - if (regs.sr.drc == 0) + + if (regs.sr.drc == 0) { //16-bit if (regs.sr.drs == 0) { regs.sr.drs = 1; regs.dr = (regs.dr & 0xff00) | (data << 0); - } - else + } + else { regs.sr.rqm = 0; regs.sr.drs = 0; regs.dr = (data << 8) | (regs.dr & 0x00ff); } - } - else + } + else { //8-bit regs.sr.rqm = 0; |