2 Skelton for retropc emulator
4 Author : Takeda.Toshiya
7 [ SCSI base initiator ]
10 #include "scsi_host.h"
12 void SCSI_HOST::reset()
15 bsy_status = cd_status = io_status = msg_status = req_status = 0;
23 void SCSI_HOST::write_dma_io16(uint32_t addr, uint32_t data)
25 void SCSI_HOST::write_dma_io8(uint32_t addr, uint32_t data)
28 #ifdef _SCSI_DEBUG_LOG
29 emu->force_out_debug_log(_T("[SCSI_HOST] Write %02X\n"), data);
31 write_signals(&outputs_dat, data);
33 #ifdef SCSI_HOST_AUTO_ACK
34 // set ack to clear req signal immediately
35 if(bsy_status && !io_status) {
36 this->write_signal(SIG_SCSI_ACK, 1, 1);
42 uint32_t SCSI_HOST::read_dma_io16(uint32_t addr)
44 uint32_t SCSI_HOST::read_dma_io8(uint32_t addr)
47 uint32_t value = data_reg;
48 #ifdef _SCSI_DEBUG_LOG
49 emu->force_out_debug_log(_T("[SCSI_HOST] Read %02X\n"), value);
51 #ifdef SCSI_HOST_AUTO_ACK
52 // set ack to clear req signal immediately
53 if(bsy_status && io_status) {
54 this->write_signal(SIG_SCSI_ACK, 1, 1);
60 void SCSI_HOST::write_signal(int id, uint32_t data, uint32_t mask)
65 #ifdef _SCSI_DEBUG_LOG
66 emu->out_debug_log(_T("[SCSI_HOST] SEL = %d\n"), (data & mask) ? 1 : 0);
68 write_signals(&outputs_sel, (data & mask) ? 0xffffffff : 0);
72 #ifdef _SCSI_DEBUG_LOG
73 // emu->out_debug_log(_T("[SCSI_HOST] ATN = %d\n"), (data & mask) ? 1 : 0);
75 write_signals(&outputs_atn, (data & mask) ? 0xffffffff : 0);
79 #ifdef _SCSI_DEBUG_LOG
80 emu->out_debug_log(_T("[SCSI_HOST] ACK = %d\n"), (data & mask) ? 1 : 0);
82 write_signals(&outputs_ack, (data & mask) ? 0xffffffff : 0);
86 #ifdef _SCSI_DEBUG_LOG
87 emu->out_debug_log(_T("[SCSI_HOST] RST = %d\n"), (data & mask) ? 1 : 0);
89 write_signals(&outputs_rst, (data & mask) ? 0xffffffff : 0);
95 data_reg |= (data & mask);
100 bsy_status |= (data & mask);
101 write_signals(&outputs_bsy, bsy_status ? 0xffffffff : 0);
106 cd_status |= (data & mask);
111 io_status |= (data & mask);
116 msg_status |= (data & mask);
121 uint32_t prev_status = req_status;
123 req_status |= (data & mask);
125 if(!prev_status && req_status) {
128 if(!cd_status && !msg_status) {
132 } else if (cd_status) {
133 // command/status/message phase
137 } else if(prev_status && !req_status) {
141 #ifdef SCSI_HOST_AUTO_ACK
142 this->write_signal(SIG_SCSI_ACK, 0, 0);
150 uint32_t SCSI_HOST::read_signal(int id)
155 return bsy_status ? 0xffffffff : 0;
158 return cd_status ? 0xffffffff : 0;
161 return io_status ? 0xffffffff : 0;
164 return msg_status ? 0xffffffff : 0;
167 return req_status ? 0xffffffff : 0;
171 uint32_t value = access ? 0xffffffff : 0;
176 void SCSI_HOST::set_irq(bool value)
178 write_signals(&outputs_irq, value ? 0xffffffff : 0);
181 void SCSI_HOST::set_drq(bool value)
183 write_signals(&outputs_drq, value ? 0xffffffff : 0);
186 #define STATE_VERSION 1
188 void SCSI_HOST::save_state(FILEIO* state_fio)
190 state_fio->FputUint32(STATE_VERSION);
191 state_fio->FputInt32(this_device_id);
193 state_fio->FputUint32(data_reg);
194 state_fio->FputUint32(bsy_status);
195 state_fio->FputUint32(cd_status);
196 state_fio->FputUint32(io_status);
197 state_fio->FputUint32(msg_status);
198 state_fio->FputUint32(req_status);
201 bool SCSI_HOST::load_state(FILEIO* state_fio)
203 if(state_fio->FgetUint32() != STATE_VERSION) {
206 if(state_fio->FgetInt32() != this_device_id) {
209 data_reg = state_fio->FgetUint32();
210 bsy_status = state_fio->FgetUint32();
211 cd_status = state_fio->FgetUint32();
212 io_status = state_fio->FgetUint32();
213 msg_status = state_fio->FgetUint32();
214 req_status = state_fio->FgetUint32();