X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fcdrom.cpp;h=d5d2b8eadf7dc327474e1cbfabaea4380544f6b3;hb=847f593941ee60d7be72cd07309201bfdb3651f8;hp=9d98e0b88f4ca3f2f59846c7e21c7793c2f2d1e8;hpb=0031c06df2f7f099ca5ecf1632f46b92f6b0dd79;p=virtualjaguar diff --git a/src/cdrom.cpp b/src/cdrom.cpp index 9d98e0b..d5d2b8e 100644 --- a/src/cdrom.cpp +++ b/src/cdrom.cpp @@ -28,17 +28,55 @@ void cdrom_done(void) { } -void cdrom_byte_write(uint32 offset, uint8 data) +// +// CD-ROM memory access functions +// + +uint8 CDROMReadByte(uint32 offset, uint32 who/*=UNKNOWN*/) +{ +#ifdef CDROM_LOG + WriteLog("CDROM: reading byte from 0x%.8x\n",offset); +#endif + return cdrom_ram[offset & 0xFF]; +} + +uint16 CDROMReadWord(uint32 offset, uint32 who/*=UNKNOWN*/) +{ + offset &= 0xFF; + + uint16 data = 0x0000; + + if (offset == 0x00) + data = 0x0000; + else if (offset == 0x02) + data = 0x2000; + else if (offset == 0x0A) + { + if (cdrom_cmd == 0x7001) + data = cdrom_cmd; + else + data = 0x0400; + } + else + data = (cdrom_ram[offset+0] << 8) | cdrom_ram[offset+1]; + +#ifdef CDROM_LOG + WriteLog("CDROM: reading word 0x%.4x from 0x%.8x [68k pc=0x%.8x]\n",data,offset,s68000readPC()); +#endif + return data; +} + +void CDROMWriteByte(uint32 offset, uint8 data, uint32 who/*=UNKNOWN*/) { offset &= 0xFF; cdrom_ram[offset] = data; #ifdef CDROM_LOG - fprintf(log_get(),"cdrom: writing byte 0x%.2x at 0x%.8x\n",data,offset); + WriteLog("CDROM: writing byte 0x%.2x at 0x%.8x\n",data,offset); #endif } -void cdrom_word_write(uint32 offset, uint16 data) +void CDROMWriteWord(uint32 offset, uint16 data, uint32 who/*=UNKNOWN*/) { offset &= 0xFF; cdrom_ram[offset+0] = (data >> 8) & 0xFF; @@ -51,7 +89,7 @@ void cdrom_word_write(uint32 offset, uint16 data) cdrom_cmd=data; if ((data&0xff00)==0x1500) { - fprintf(log_get(),"cdrom: setting mode 0x%.2x\n",data&0xff); + WriteLog("CDROM: setting mode 0x%.2x\n",data&0xff); return; } if (data==0x7001) @@ -68,48 +106,14 @@ void cdrom_word_write(uint32 offset, uint16 data) offset<<=8; offset|=cdrom_ram[0x05]; - fprintf(log_get(),"cdrom: READ(0x%.8x, 0x%.4x) [68k pc=0x%.8x]\n",offset,size,s68000readPC()); + WriteLog("CDROM: READ(0x%.8x, 0x%.4x) [68k pc=0x%.8x]\n",offset,size,s68000readPC()); return; } else - fprintf(log_get(),"cdrom: unknown command 0x%.4x\n",data); + WriteLog("CDROM: unknown command 0x%.4x\n",data); } */ #ifdef CDROM_LOG - fprintf(log_get(),"cdrom: writing word 0x%.4x at 0x%.8x\n",data,offset); -#endif -} - -uint8 cdrom_byte_read(uint32 offset) -{ -#ifdef CDROM_LOG - fprintf(log_get(),"cdrom: reading byte from 0x%.8x\n",offset); + WriteLog("CDROM: writing word 0x%.4x at 0x%.8x\n",data,offset); #endif - return cdrom_ram[offset & 0xFF]; -} - -uint16 cdrom_word_read(uint32 offset) -{ - offset &= 0xFF; - - uint16 data = 0x0000; - - if (offset == 0x00) - data = 0x0000; - else if (offset == 0x02) - data = 0x2000; - else if (offset == 0x0A) - { - if (cdrom_cmd == 0x7001) - data = cdrom_cmd; - else - data = 0x0400; - } - else - data = (cdrom_ram[offset+0] << 8) | cdrom_ram[offset+1]; - -#ifdef CDROM_LOG - fprintf(log_get(),"cdrom: reading word 0x%.4x from 0x%.8x [68k pc=0x%.8x]\n",data,offset,s68000readPC()); -#endif - return data; }