[VM][FMTOWNS][SCSI] Adjust around DMAC.

diff --git a/source/src/vm/fmtowns/scsi.cpp b/source/src/vm/fmtowns/scsi.cpp
index 8365055..bbbdf27 100644 (file)
--- a/source/src/vm/fmtowns/scsi.cpp
+++ b/source/src/vm/fmtowns/scsi.cpp
@@ -67,6 +67,9 @@ void SCSI::write_io8w(uint32_t addr, uint32_t data, int *wait)
                if((machine_id >= 0x0300) & ((machine_id & 0xff00) != 0x0400)) { // After UX
                        ex_int_enable = ((data & 0x20) != 0) ? true : false;
                        // Set host to 16bit bus width. BIT3 ,= '1'.
+                       if(d_dma != NULL) {
+                               d_dma->write_signal(SIG_UPD71071_UBE_CH0, 0xffffffff, 0xffffffff);
+                       }
                }
                if(ctrl_reg  & CTRL_WEN) {
                        d_host->write_signal(SIG_SCSI_RST, data, CTRL_RST);
@@ -121,7 +124,7 @@ uint32_t SCSI::read_io8w(uint32_t addr, int* wait)
                #ifdef _SCSI_DEBUG_LOG
                        this->out_debug_log(_T("[SCSI] in  %04X %02X\n"), addr, value);
                #endif
-//                     irq_status = false;
+//             irq_status = false;
 //             return value;
                        break;
        case 0xc34:
@@ -147,7 +150,7 @@ void SCSI::write_signal(int id, uint32_t data, uint32_t mask)
 {
        switch(id) {
        case SIG_SCSI_16BIT_BUS:
-               //transfer_16bit = ((data & mask) != 0) ? true : false;
+               transfer_16bit = ((data & mask) != 0) ? true : false;
                break;
        case SIG_SCSI_IRQ:
                if((ctrl_reg & CTRL_IMSK)) {
@@ -170,7 +173,9 @@ void SCSI::write_signal(int id, uint32_t data, uint32_t mask)
 
        case SIG_SCSI_DRQ:
                if(((ctrl_reg & CTRL_DMAE) != 0) /*&& (dma_enabled)*/) {
-                       d_dma->write_signal(SIG_UPD71071_CH1, data, mask);
+                       if(d_dma != NULL) {
+                               d_dma->write_signal(SIG_UPD71071_CH1, data, mask);
+                       }
                }
 /*             if((machine_id >= 0x0300) & ((machine_id & 0xff00) != 0x0400)) { // After UX
                        if(ex_int_enable) {