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bus.cpp
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#include "bus.h"
#include <cassert>
#include <memory.h>
#include <stdio.h>
#include "ansi/c6502.h"
#include "comm.h"
#include "mem.h"
#include "ram.h"
#include "state.h"
#include "nand.h"
#include "NekoDriverIO.h"
#include "io.h"
extern nc1020_states_t nc1020_states;
extern Dsp dsp;
static uint8_t * rtc_reg=nc1020_states.rtc_reg;
static uint8_t& interr_flag = nc1020_states.interr_flag;
long long recTick=0,lastDac=0,recTotal=0;
BusPC1000::BusPC1000() {
///////////sound = 0;
ioReg=nc1020_states.ram_io;
musicEnable = true;
dsp= &::dsp;
dsp->reset();
reset();
for (int i=0;i<8;i++)
key_posi[i]=0;
}
void BusPC1000::reset() {
tm0v=tm0r=tm1v=0;
timer0run=timer1run=false;
tmaValue=tmaReload=0;
dspSleep=isPlayMusic=false;
dspData=0;
musicSample = 0;
recTick=lastDac=recTotal=0;
}
void BusPC1000::warmReset() {
recTick=lastDac=recTotal=0;
ioReg[IO_TIMER0_VAL] = 1;
}
int BusPC1000::read(int address) {
uint8_t Load(uint16_t addr);
return Load(address);
}
void BusPC1000::write(int address, int value) {
void Store(uint16_t addr, uint8_t value);
Store(address,value);
}
uint8_t IO_API Read3B(uint8_t addr);
uint8_t IO_API Read3F(uint8_t addr);
int BusPC1000::in(int address) {
if(nc1020mode||nc2000mode||nc3000mode){
if(address==0x04) return Read04StopTimer0(address);
if(address==0x05) return Read05StartTimer0(address);
if(address==0x06) return Read06StopTimer1(address);
if(address==0x07) return Read07StartTimer1(address);
if(address==0x08){
return ReadPort0(address);
}
if(address==0x09){
return ReadPort1(address);
}
if(address==0x18){
return Read18Port4(address);//not important? seems like hotlink only
}
if(address==0x3b){
if((ioReg[0x3d]&3)==0){
return rtc_reg[0x3b]&0xfe;
}else{
return ioReg[0x3b];
}
//return Read3B(address);
}
if(address==0x3f){
return rtc_reg[ioReg[0x3e]];
//return Read3F(address);
}
}
if(nc3000mode){
if(address==0x39) {
return read_nand();
}
if(address==0x1e){
return ReadPort6EXP(address);
}
}
if(nc2000mode){
if(address==0x29) {
return read_nand();
}
switch(address){
case 0x30:
return dspStat();
case 0x31:
return dspRetData();
}
}
if(pc1000mode){
switch(address){
case IO_STOP_TIMER0://0x04
timer0run = false;
return (int) tm0v;
case IO_START_TIMER0://0x05
timer0run = true;
return (int) tm0v;
case IO_STOP_TIMER1://0x06
timer1run = false;
return (int) tm1v;
case IO_START_TIMER1://0x07
timer1run = true;
return (int) tm1v;
case IO_PORT3://0x0b //keyboard handling inside
return readPort3();
case IO_GENERAL_STATUS://0xc
return record();
case IO_DSP_STAT://0x20
return dspStat();
case IO_DSP_RET_DATA://0x21
return dspRetData();
}
}
switch (address) {
case IO_INT_STATUS://0x01
{
int t;
t = ioReg[IO_INT_STATUS];
ioReg[IO_INT_STATUS] &= 0xc0;
return t;
}
default:
return ioReg[address];
}
}
extern unsigned short lcdbuffaddr;
extern unsigned short lcdbuffaddrmask;
void Write23(uint8_t addr, uint8_t value);
void Write3F(uint8_t addr, uint8_t value);
void BusPC1000::out(int address, int value) {
if(nc3000mode){
if(address==0x05){
uint8_t cks=value>>5;
if (cks!=ram_io[0x05]>>5){
//the defintion is not same as spdc1024
switch(cks){
case 0: speed_slowdown=32;break;
case 1: speed_slowdown=4;break;
case 2: speed_slowdown=2;break;
case 3: speed_slowdown=1;break;
case 4: speed_slowdown=512;break;
case 5: speed_slowdown=256;break;
case 6: speed_slowdown=64;break;
case 7: printf("oops clk off\n");speed_slowdown=999999;break;
default:assert(false);
}
//printf("<cks=%d slowdown=%d>\n",cks,speed_slowdown);
}
//purposely not return
}
if(address==0x39) {
return nand_write(value);
}
}
if(nc2000mode) {
if(address==0x05){
uint8_t cks=value>>5;
if (cks!=ram_io[0x05]>>5){
switch(cks){
case 0: speed_slowdown=8;break;
case 1: speed_slowdown=4;break;
case 2: speed_slowdown=2;break;
case 3: speed_slowdown=1;break;
case 4: speed_slowdown=64;break;
case 5: speed_slowdown=32;break;
case 6: speed_slowdown=16;break;
case 7: printf("oops clk off\n");speed_slowdown=99999;break;
default:assert(false);
}
//printf("<cks=%d slowdown=%d>\n",cks,speed_slowdown);
}
//purposely not return
}
if(address==0x29) {
return nand_write(value);
}
}
if(nc2000mode||nc3000mode){
if(false){
if(address==0x32) {
printf("<w %02x>",value);
}
if(address==0x33){
printf("[w %02x]\n",value);
}
}
switch(address){
case 0x30:
//printf("dsp reset\n");
if (value == DSP_RESET_FLAG || value == DSP_WAKEUP_FLAG) {
dspSleep = false;
dsp->reset();
}
return;
case 0x33:
ioReg[0x33] = value;
dspCmd(ioReg[0x33] * 256 + ioReg[0x32]);
dsp->write(value,ioReg[0x32]);
return;
}
}
if(nc1020mode||nc2000mode||nc3000mode){
if(address==0x04){
Write04GeneralCtrl(address,value);
//Write09Port1(0x09, ram_io[0x09]);//reapply after PTYPE changed??
return;
}
if(address==0x05){
return Write05ClockCtrl(address, value);
}
if(address==0x06){
return Write06LCDStartAddr(address, value);
}
if(address==0x07){
return Write07PortConfig(address,value);//not important? seems like only hotlink inside
}
if(address==0x08){
return Write08Port0(address, value);
}
if(address==0x09){
return Write09Port1(address,value);
}
if(address==0x0b){
return Write0BPort3LCDStartAddr(address,value);
}
if(address==0x0c){
return Write0CTimer01Control(address,value);
}
if(address==0x0d){
ioReg[0x0d] = value;
super_switch();
return;
}
if(address==0x0f){
return Write0F(address,value);
}
if(address==0x15){
return Write15Dir1(address, value);
}
if(address==0x18){
return Write18Port4(address, value);
}
if(address==0x19){
return Write19CkvSelect(address, value);//not important? seems like only hotlink inside
}
if(address==0x20){
return Write20JG(address, value);
}
if(address==0x23){
return Write23(address,value);
}
if(address==0x3d){
ioReg[0x3d]= ioReg[0x3d] &0xf8 |value &7;
return;
}
if(address==0x3f){
int index=ioReg[0x3e];
ioReg[0x3f]=value;
if(index<7){
if((signed char)rtc_reg[0x0b]<0) return;
}else{
if(index==10){
rtc_reg[10]=value;
interr_flag= interr_flag|value&7;
return;
}
if(index==0x0b){
if((value&1)==0){
return ;
}
ioReg[0x3d]=0xf8;
return;
}
}
rtc_reg[index]=value;
return;
//return Write3F(address,value);
}
}
if(pc1000mode){
switch(address){
case IO_TIMER0_VAL://0x02
ioReg[IO_TIMER0_VAL] = value;
tm0v = value + tm0r;
if (tm0v > 255) {
tm0v = 255;
}
tm0r = 0;
return;
case IO_TIMER1_VAL://0x03
ioReg[IO_TIMER1_VAL] = value;
tm1v = value;
return;
case IO_PORT_CONFIG://0x07
case IO_CTV_SELECT://0x19
ioReg[address] = value;
checkPlay();
return;
case IO_PORT0://0x08
ioReg[IO_PORT0] = value;
ioReg[O_PORT0] = value;
return;
case IO_PORT1://0x09
ioReg[IO_PORT1] = value;
read_key();
return;
case IO_DAC_DATA://0x0e
ioReg[IO_DAC_DATA] = value;
{
long long t=cpu->getTotalCycles();
if (t-lastDac>3686400) {
if (lastDac)
recTotal+=lastDac-recTick;
recTick=t;
}
lastDac=t;
}
return;
case IO_ZP_BSW://0x0f
ioReg[IO_ZP_BSW] = value;
super_switch();
/////////zpBankSwitch();
return;
case IO_PORT4://0x18
ioReg[IO_PORT4] = value;
if (isPlayMusic) {
musicSample = (value & 0x80) == 0 ? -1 : 1;
}
{
int a=value &0x80;
if (a==0) a=-1;
void beeper_on_io_write(int);
beeper_on_io_write(a);
}
return;
case IO_DSP_STAT://0x20
if (value == DSP_RESET_FLAG || value == DSP_WAKEUP_FLAG) {
dspSleep = false;
dsp->reset();
}
return;
case IO_DSP_DATA_HI://0x23
ioReg[IO_DSP_DATA_HI] = value;
dspCmd(ioReg[IO_DSP_DATA_HI] * 256 + ioReg[IO_DSP_DATA_LOW]);
dsp->write(value,ioReg[IO_DSP_DATA_LOW]);
return;
}
}
switch (address) {
case IO_BANK_SWITCH://0x00
ioReg[IO_BANK_SWITCH] = value;
super_switch();
/////////////bankSwitch();
return;
case IO_INT_ENABLE://0x01
ioReg[O_INT_ENABLE] = value;
return;
case IO_BIOS_BSW://0x0a
ioReg[IO_BIOS_BSW] = value;
super_switch();
/////////////biosBankSwitch();
/////////////bankSwitch();
return;
case IO_TIMERA_VAL_L://0x10
tmaReload = (tmaReload & 0xff00) | value;
return;
case IO_TIMERA_VAL_H://0x11
tmaReload = (tmaReload & 0xff) | (value << 8);
tmaValue = tmaReload;
return;
default:
ioReg[address] = value;
}
}
void BusPC1000::playSample() {
/*************
if (musicEnable && isPlayMusic && sound) {
sound->write(musicSample * 8192);
}*/
}
void BusPC1000::checkPlay() {
boolean isPlay = (ioReg[IO_PORT_CONFIG] & 0x80) != 0 && (ioReg[IO_CTV_SELECT] & 0x80) == 0;
if (isPlayMusic != isPlay) {
isPlayMusic = isPlay;
if (musicEnable) {
if (isPlayMusic) {
/***********
if (sound) {
sound->play();
}*/
} else {
/***************
if (sound)
sound->stop();
*/
}
}
}
}
void BusPC1000::setTimer() {
int temp = ioReg[IO_TIMERAB_CTRL] >> 4;
if (temp != 0) {
tmaValue += (256 >> temp);
if (tmaValue >= 0x10000) {
tmaValue = tmaReload;
if ((ioReg[O_INT_ENABLE] & 1) != 0)
ioReg[IO_INT_STATUS] |= 1;
}
}
}
boolean BusPC1000::setTimer0() {
if (timer0run) {
tm0v += 64;
if (tm0v >= 256) {
tm0v -= 256;
tm0r = tm0v;
return true;
}
}
return false;
}
boolean BusPC1000::setTimer1() {
if (timer1run) {
tm1v += 0.5;
if (tm1v >= 256) {
tm1v = 0;
return true;
}
}
return false;
}
void BusPC1000::setIrqTimeBase() {
ioReg[IO_INT_STATUS] |= INT_TIME_BASE;
}
void BusPC1000::setIrqTimer0() {
ioReg[IO_INT_STATUS] |= INT_TIME0;
}
void BusPC1000::setIrqTimer1() {
ioReg[IO_INT_STATUS] |= INT_TIME1;
}
int BusPC1000::dspStat() {
int value = 0;
if(nc2000mode||nc3000mode){
value=ram_io[0x30];
value &=~DSP_SLEEP_FLAG;
value &=~0x30;
}
if (dspSleep)
value |= DSP_SLEEP_FLAG;
/***********
if (!dspSleep && sound->busy())
value |= 0x30;*/
bool sound_busy(void);
if(!dspSleep && sound_busy()){
value |= 0x30;
}
if(pc1000mode){
value |= 0x40;
}
return value;
}
int BusPC1000::dspRetData() {
int ret=dspData;
if (ret==0x5a)
dspData=0xff;
else
dspData=0;
return ret;
}
void BusPC1000::dspCmd(int cmd) {
//Global.log("DSP_CMD " + Integer.toHexString(cmd));
switch (cmd) {
case 0x8000: //SLEEP
dspSleep = true;
break;
case 0xd001:
dspData = 0x5a;
break;
}
}
boolean BusPC1000::keyDown2(int y,int x) {
assert(y>=0 &&y<8);
assert(x>=0 &&x<8);
int v = (7-y)*256;
v+=1<<x;
//printf("keycode= %04x\n",v);
if (v != 0) {
key_posi[v >> 8] = v & 0xff;
if ((((v >> 8) == 6 && (v & 0x7f) != 0) || v == 0x701) && ioReg[IO_CLOCK_CTRL] == 0xf0) {
return false;
}
}
return true;
}
void BusPC1000::keyUp() {
for (int i = 0; i < 8; i++) {
key_posi[i] = 0;
}
}
int BusPC1000::readPort3() {
int p0Dir = ioReg[IO_ZP_BSW] & 0xf0;
int p1Dir = ioReg[IO_PORT1_DIR] & 3;
int b0 = 1;
if (p0Dir == 0xf0) {
//port0是输出
int port0 = ioReg[O_PORT0];
switch (port0) {
case 0xfe: //字典
b0 = ((key_posi[6] & 1) != 0) ? 0 : 1;
break;
case 0xfd: //名片
b0 = ((key_posi[6] & 2) != 0) ? 0 : 1;
break;
case 0xfb: //计算
b0 = ((key_posi[6] & 4) != 0) ? 0 : 1;
break;
case 0xf7: //提醒（测验）
b0 = ((key_posi[6] & 8) != 0) ? 0 : 1;
break;
case 0xef: //资料（游戏）
b0 = ((key_posi[6] & 0x10) != 0) ? 0 : 1;
break;
case 0xdf: //时间
b0 = ((key_posi[6] & 0x20) != 0) ? 0 : 1;
break;
case 0xbf: //网络
b0 = ((key_posi[6] & 0x40) != 0) ? 0 : 1;
break;
case 0x7f: //放音
b0 = ((key_posi[6] & 0x80) != 0) ? 0 : 1;
break;
case 0xff: //开机
b0 = ((key_posi[7] & 1) != 0) ? 0 : 1;
break;
case 0: //检测所有可开机键
b0 = ((key_posi[6] & 0xff) != 0 || (key_posi[7] & 1) != 0) ? 0 : 1;
break;
}
}
if (b0 == 1 && p1Dir == 3) {
if (ioReg[IO_PORT1] == 0xfe) {
b0 = ((key_posi[7] & 2) != 0) ? 0 : 1;
} else if (ioReg[IO_PORT1] == 0xfd) {
b0 = ((key_posi[7] & 4) != 0) ? 0 : 1;
} else if ((ioReg[IO_PORT1] & 3) == 0) {
b0 = ((key_posi[7] & 6) != 0) ? 0 : 1;
}
}
return (ioReg[IO_PORT3] & 0xfe) | b0;
}
int BusPC1000::read_key() {
int value = ioReg[IO_PORT1];
switch (value) {
case 0x80:
ioReg[IO_PORT0] = key_posi[0];
break;
case 0x40:
ioReg[IO_PORT0] = key_posi[1];
break;
case 0x20:
ioReg[IO_PORT0] = key_posi[2];
break;
case 0x10:
ioReg[IO_PORT0] = key_posi[3];
break;
case 8:
ioReg[IO_PORT0] = key_posi[4];
break;
case 4:
ioReg[IO_PORT0] = key_posi[5];
break;
}
/*int value = 0;
if ((ioReg[IO_PORT1_DIR] & 0xfc) != 0) {
if ((ioReg[IO_PORT1]&0x80) && (ioReg[IO_PORT1_DIR]&0x80))
value|=key_posi[0];
if ((ioReg[IO_PORT1]&0x40) && (ioReg[IO_PORT1_DIR]&0x40))
value|=key_posi[1];
if ((ioReg[IO_PORT1]&0x20) && (ioReg[IO_PORT1_DIR]&0x20))
value|=key_posi[2];
if ((ioReg[IO_PORT1]&0x10) && (ioReg[IO_PORT1_DIR]&0x10))
value|=key_posi[3];
if ((ioReg[IO_PORT1]&0x8) && (ioReg[IO_PORT1_DIR]&0x8))
value|=key_posi[4];
if ((ioReg[IO_PORT1]&0x4) && (ioReg[IO_PORT1_DIR]&0x4))
value|=key_posi[5];
if(ioReg[IO_PORT1]&0xfc)
ioReg[IO_PORT0]=value;
} else {
return ioReg[IO_PORT0];
}*/
return value;
}
bool initRecord=false;
int reclen;
byte* recfile;
int BusPC1000::record() {
if (!initRecord) {
initRecord=true;
//////////////////recfile=loadBin(IDR_RECWAV,reclen);
reclen=10000;////////////hack
recfile=new byte[reclen];/////////////////hack
}
int v = recfile[((cpu->getTotalCycles() - recTick + recTotal) / 12 * 8000 / 3686400) % reclen];
if (ioReg[IO_DAC_DATA]>v)
v=0x80;
else
v=0;
return (ioReg[IO_GENERAL_STATUS] & 0x7f) | v;
}
boolean BusPC1000::nmiEnable() {
return (ioReg[O_INT_ENABLE] & 0x10) == 0;
}
boolean BusPC1000::timeBaseEnable() {
if(nc2000mode||nc3000mode){
if((ioReg[O_INT_ENABLE] & 8)) return false;
/*
// todo fix this
if (this->field_0x96d4ac != '\0') {
return true;
}*/
return (ioReg[IO_GENERAL_CTRL] & 0xf)!=0;
}
return (ioReg[O_INT_ENABLE] & 8) == 0 && (ioReg[IO_GENERAL_CTRL] & 0xf) > 0;
}