/*
NEC PC-9801VX Emulator 'ePC-9801VX'
NEC PC-9801RA Emulator 'ePC-9801RA'
+ NEC PC-98XA Emulator 'ePC-98XA'
NEC PC-98XL Emulator 'ePC-98XL'
NEC PC-98RL Emulator 'ePC-98RL'
*/
#include "sasi.h"
+#include "../harddisk.h"
+#include "../i8237.h"
+#include "../i8259.h"
+#include "../scsi_host.h"
+#include "../scsi_hdd.h"
#define OCR_CHEN 0x80
#define OCR_NRDSW 0x40
#define ISR_IXO 0x04
#define ISR_INT 0x01
-void SASI::initialize()
-{
-
-}
+namespace PC9801 {
void SASI::reset()
{
-
+ ocr = 0;
+ irq_status = drq_status = false;
}
void SASI::write_io8(uint32_t addr, uint32_t data)
{
switch(addr) {
case 0x0080:
+ #ifdef _SCSI_DEBUG_LOG
+ this->out_debug_log(_T("[SASI] out %04X %02X\n"), addr, data);
+ #endif
+// if(ocr & OCR_CHEN) {
+ d_host->write_dma_io8(addr, data);
+// }
break;
+
case 0x0082:
+ #ifdef _SCSI_DEBUG_LOG
+ this->out_debug_log(_T("[SASI] out %04X %02X\n"), addr, data);
+ #endif
+ d_host->write_signal(SIG_SCSI_RST, data, OCR_RST);
+ d_host->write_signal(SIG_SCSI_SEL, data, OCR_SEL);
ocr = data;
break;
}
uint32_t SASI::read_io8(uint32_t addr)
{
+ uint32_t value = 0;
+
switch(addr) {
case 0x0080:
- break;
+// if(ocr & OCR_CHEN) {
+ value = d_host->read_dma_io8(addr);
+// }
+ #ifdef _SCSI_DEBUG_LOG
+ this->out_debug_log(_T("[SASI] in %04X %02X\n"), addr, value);
+ #endif
+ return value;
+
case 0x0082:
if(ocr & OCR_NRDSW) {
- return isr;
+ value = (d_host->read_signal(SIG_SCSI_REQ) ? ISR_REQ : 0) |
+// (d_host->read_signal(SIG_SCSI_ACK) ? ISR_ACK : 0) |
+ (d_host->read_signal(SIG_SCSI_BSY) ? ISR_BSY : 0) |
+ (d_host->read_signal(SIG_SCSI_MSG) ? ISR_MSG : 0) |
+ (d_host->read_signal(SIG_SCSI_CD ) ? ISR_CXD : 0) |
+ (d_host->read_signal(SIG_SCSI_IO ) ? ISR_IXO : 0) |
+ (irq_status ? ISR_INT : 0);
+// irq_status = false;
+ #ifdef _SCSI_DEBUG_LOG
+ this->out_debug_log(_T("[SASI] in %04X %02X (REQ=%d,BSY=%d,MSG=%d,CxD=%d,IxO=%d,DH=%02X,DL=%02X)\n"), addr, value,
+ (value & ISR_REQ) ? 1 : 0,
+ (value & ISR_BSY) ? 1 : 0,
+ (value & ISR_MSG) ? 1 : 0,
+ (value & ISR_CXD) ? 1 : 0,
+ (value & ISR_IXO) ? 1 : 0,
+ vm->get_cpu(0)->read_debug_reg(_T("DH")), vm->get_cpu(0)->read_debug_reg(_T("DL")));
+ #endif
} else {
-
+ value = 0;
+ for(int i = 0; i < 2; i++) {
+ HARDDISK *unit = d_hdd->get_disk_handler(i);
+ uint32_t dt = 7, ct = 0;
+
+ if(unit != NULL && unit->mounted()) {
+ double size = unit->sector_num * unit->sector_size;
+ int size_mb = (int)(size / 1024.0 / 1024.0 + 0.5);
+
+ if(size_mb <= 6) {
+ dt = 0;
+ } else if(size_mb <= 11) {
+ dt = 1;
+ } else if(size_mb <= 16) {
+ dt = 2;
+ } else if(size_mb <= 21) {
+ if(unit->surfaces != 4) {
+ dt = 3;
+ } else {
+ dt = 4;
+ }
+ } else if(size_mb <= 31) {
+ dt = 5;
+ } else {
+ dt = 6;
+ }
+ if(unit->sector_size == 512) {
+ ct = 1;
+ }
+ }
+ value |= dt << (i == 0 ? 3 : 0);
+ value |= ct << (i == 0 ? 7 : 6);
+ }
+ #ifdef _SCSI_DEBUG_LOG
+ this->out_debug_log(_T("[SASI] in %04X %02X (NRDSW=0)\n"), addr, value);
+ #endif
}
- break;
+ return value;
}
return 0xff;
}
+/*
void SASI::write_dma_io8(uint32_t addr, uint32_t data)
{
write_io8(0x0080, data);
{
return read_io8(0x0080);
}
+*/
-#define STATE_VERSION 1
-
-void SASI::save_state(FILEIO* state_fio)
+void SASI::write_signal(int id, uint32_t data, uint32_t mask)
{
- state_fio->FputUint32(STATE_VERSION);
- state_fio->FputInt32(this_device_id);
+ switch(id) {
+ case SIG_SASI_IRQ:
+ #ifdef _SCSI_DEBUG_LOG
+ this->out_debug_log(_T("[SASI] IRQ=%d\n"), (data & mask) ? 1 : 0);
+ #endif
+ if(ocr & OCR_INTE) {
+ d_pic->write_signal(SIG_I8259_CHIP1 | SIG_I8259_IR1, data, mask);
+ }
+ irq_status = ((data & mask) != 0);
+ break;
+
+ case SIG_SASI_DRQ:
+ #ifdef _SCSI_DEBUG_LOG
+ this->out_debug_log(_T("[SASI] DRQ=%d\n"), (data & mask) ? 1 : 0);
+ #endif
+ if(ocr & OCR_DMAE) {
+ #ifdef _PC98XA
+ d_dma->write_signal(SIG_I8237_CH3, data, mask);
+ #else
+ d_dma->write_signal(SIG_I8237_CH0, data, mask);
+ #endif
+ } else {
+ if(data & mask) {
+ #ifdef _SCSI_DEBUG_LOG
+ this->out_debug_log(_T("[SASI] DMAE=0, change IRQ\n"));
+ #endif
+ write_signal(SIG_SASI_IRQ, data, mask);
+ }
+ }
+ drq_status = ((data & mask) != 0);
+ break;
+
+ case SIG_SASI_TC:
+ #ifdef _SCSI_DEBUG_LOG
+ this->out_debug_log(_T("[SASI] TC=%d\n"), (data & mask) ? 1 : 0);
+ #endif
+ if(data & mask) {
+ ocr &= ~OCR_DMAE;
+ }
+ break;
+ }
}
-bool SASI::load_state(FILEIO* state_fio)
+#define STATE_VERSION 2
+
+bool SASI::process_state(FILEIO* state_fio, bool loading)
{
- if(state_fio->FgetUint32() != STATE_VERSION) {
+ if(!state_fio->StateCheckUint32(STATE_VERSION)) {
return false;
}
- if(state_fio->FgetInt32() != this_device_id) {
+ if(!state_fio->StateCheckInt32(this_device_id)) {
return false;
}
+ state_fio->StateUint8(ocr);
+ state_fio->StateBool(irq_status);
+ state_fio->StateBool(drq_status);
return true;
}
+}
+
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