Add patch 1151453 from h-a-l-9000. Improves softmodem and directserial supports. Adds a dummy serial class as well and makes the serial ports runtime changable
Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2257
This commit is contained in:
Peter Veenstra
parent
4b6fd3c481
commit
a5252330f7
19 changed files with 3329 additions and 1484 deletions
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@ -16,7 +16,7 @@
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/* $Id: bios.cpp,v 1.42 2005-06-21 18:47:25 qbix79 Exp $ */
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/* $Id: bios.cpp,v 1.43 2005-07-30 14:41:31 qbix79 Exp $ */
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#include "dosbox.h"
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#include "mem.h"
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@ -177,14 +177,179 @@ static Bitu INT17_Handler(void) {
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return CBRET_NONE;
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}
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static Bitu INT14_Handler(void) {
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switch (reg_ah) {
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static Bitu INT14_Handler(void)
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{
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Bit16u port = real_readw(0x40,reg_dx*2); // DX is always port number
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if(reg_dx > 0x3 || port==0) // no more than 4 serial ports
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{
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LOG_MSG("BIOS INT14: port %d does not exist.",reg_dx);
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return CBRET_NONE;
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}
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switch (reg_ah)
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{
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case 0x00: /* Init port */
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// Parameters:
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// AL: port parameters
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// Return:
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// AH: line status
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// AL: modem status
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{
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Bitu port=real_readw(0x40,reg_dx*2);
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// set baud rate
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Bitu baudrate = 9600;
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Bit16u baudresult;
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Bitu rawbaud=reg_al>>5;
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if(rawbaud==0){ baudrate=110;}
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else if (rawbaud==1){ baudrate=150;}
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else if (rawbaud==2){ baudrate=300;}
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else if (rawbaud==3){ baudrate=600;}
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else if (rawbaud==4){ baudrate=1200;}
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else if (rawbaud==5){ baudrate=2400;}
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else if (rawbaud==6){ baudrate=4800;}
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else if (rawbaud==7){ baudrate=9600;}
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baudresult = (Bit16u)(115200 / baudrate);
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IO_WriteB(port+3, 0x80); // enable divider access
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IO_WriteB(port,(Bit8u)baudresult&0xff);
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IO_WriteB(port+1,(Bit8u)(baudresult>>8));
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// set line parameters, disable divider access
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IO_WriteB(port+3, reg_al&0x1F);//LCR
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// disable interrupts
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IO_WriteB(port+1, 0);
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IO_ReadB(port+2);
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// put RTS and DTR on
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IO_WriteB(port+4,0x3);
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// get result
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reg_ah=IO_ReadB(port+5);
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reg_al=IO_ReadB(port+6);
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}
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break;
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case 0x01: /* Write character */
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// Parameters:
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// AL: character
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// Return:
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// AH: line status
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// AL: modem status
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{
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if((IO_ReadB(port+5)&&0x20)==0)
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{
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// TODO: should wait until they become empty->timeout
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LOG_MSG("BIOS INT14: port %d: transmit register not empty.",reg_dx);
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reg_ah = IO_ReadB(port+5)|0x80;
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return CBRET_NONE;
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}
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// transmit it
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IO_WriteB(port,reg_al);
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if((IO_ReadB(port+5)&&0x60)==0)
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{
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// TODO: should wait until they become empty->timeout
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LOG_MSG("BIOS INT14: port %d: transmit register not empty after write.",reg_dx);
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reg_ah = IO_ReadB(port+5)|0x80;
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return CBRET_NONE;
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}
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// get result
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reg_ah=IO_ReadB(port+5);
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reg_al=IO_ReadB(port+6);
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}
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break;
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case 0x02: /* Read character */
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{
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if((IO_ReadB(port+5)&0x1)!=0)
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{
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reg_al=IO_ReadB(port);
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}
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else
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{
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// TODO: should wait until timeout
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LOG_MSG("BIOS INT14: port %d: nothing received.",reg_dx);
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reg_ah = IO_ReadB(port+5)|0x80;
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return CBRET_NONE;
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}
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reg_ah=IO_ReadB(port+5);
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}
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break;
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case 0x03: // get status
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{
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reg_ah=IO_ReadB(port+5);
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//LOG_MSG("status reg_ah: %x",reg_ah);
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reg_al=IO_ReadB(port+6);
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}
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break;
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case 0x04: // extended initialisation
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// Parameters:
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// AL: break
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// BH: parity
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// BL: stopbit
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// CH: word length
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// CL: baudrate
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{
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Bit8u lcr = 0;
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// baud rate
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Bitu baudrate = 9600;
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Bit16u baudresult;
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Bitu rawbaud=reg_cl;
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if(rawbaud==0){ baudrate=110;}
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else if (rawbaud==1){ baudrate=150;}
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else if (rawbaud==2){ baudrate=300;}
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else if (rawbaud==3){ baudrate=600;}
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else if (rawbaud==4){ baudrate=1200;}
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else if (rawbaud==5){ baudrate=2400;}
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else if (rawbaud==6){ baudrate=4800;}
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else if (rawbaud==7){ baudrate=9600;}
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else if (rawbaud==8){ baudrate=19200;}
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baudresult = (Bit16u)(115200 / baudrate);
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IO_WriteB(port+3, 0x80); // enable divider access
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IO_WriteB(port,(Bit8u)baudresult&0xff);
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IO_WriteB(port+1,(Bit8u)(baudresult>>8));
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// line configuration
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// break
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if(reg_al!=0) lcr=0x40;
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// parity
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if(reg_bh!=0)
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{
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if(reg_bh==1)lcr|=0x8;// odd
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else if(reg_bh==2)lcr|=0x18;// even
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else if(reg_bh==3)lcr|=0x28;// mark
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else if(reg_bh==4)lcr|=0x38;// mark
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}
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// stopbit
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if(reg_bl!=0)
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{
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lcr|=0x4;
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}
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// data length
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lcr|=(reg_ch&0x3);
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IO_WriteB(port+3,lcr);
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reg_ah=IO_ReadB(port+5);
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reg_al=IO_ReadB(port+6);
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}
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break;
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case 0x05: // modem control
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{
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if(reg_al==0) // read MCR
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{
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reg_bl=IO_ReadB(port+4);
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}
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else if(reg_al==1) // write MCR
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{
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IO_WriteB(port+4,reg_bl);
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}
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else LOG_MSG("BIOS INT14: port %d, function 5: invalid subfunction.",reg_dx);
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reg_ah=IO_ReadB(port+5);
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reg_al=IO_ReadB(port+6);
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LOG_MSG("AX %X DX %X",reg_ax,reg_dx);
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}
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break;
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default:
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@ -429,7 +594,6 @@ private:
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CALLBACK_HandlerObject callback[10];
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public:
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BIOS(Section* configuration):Module_base(configuration){
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MSG_Add("BIOS_CONFIGFILE_HELP","Nothing to setup yet!\n");
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/* Clear the Bios Data Area */
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for (Bit16u i=0;i<1024;i++) real_writeb(0x40,i,0);
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/* Setup all the interrupt handlers the bios controls */
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@ -495,15 +659,61 @@ public:
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callback[9].Set_RealVec(0x1);
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/* Setup some stuff in 0x40 bios segment */
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/* Test for parallel port */
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if (IO_Read(0x378)!=0xff) real_writew(0x40,0x08,0x378);
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/* Test for serial port */
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Bitu index=0;
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if (IO_Read(0x3fa)!=0xff) real_writew(0x40,(index++)*2,0x3f8);
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if (IO_Read(0x2fa)!=0xff) real_writew(0x40,(index++)*2,0x2f8);
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/* Setup equipment list */
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//1 Floppy, 2 serial and 1 parrallel
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Bitu config=0x4400;
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/* detect parallel ports */
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Bit8u DEFAULTPORTTIMEOUT = 10; // 10 whatevers
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Bitu ppindex=0; // number of lpt ports
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if ((IO_Read(0x378)!=0xff)|(IO_Read(0x379)!=0xff)) {
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// this is our LPT1
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mem_writew(BIOS_ADDRESS_LPT1,0x378);
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mem_writeb(BIOS_LPT1_TIMEOUT,DEFAULTPORTTIMEOUT);
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ppindex++;
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if((IO_Read(0x278)!=0xff)|(IO_Read(0x279)!=0xff)) {
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// this is our LPT2
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mem_writew(BIOS_ADDRESS_LPT2,0x278);
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mem_writeb(BIOS_LPT2_TIMEOUT,DEFAULTPORTTIMEOUT);
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ppindex++;
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if((IO_Read(0x3bc)!=0xff)|(IO_Read(0x3be)!=0xff)) {
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// this is our LPT3
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mem_writew(BIOS_ADDRESS_LPT3,0x3bc);
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mem_writeb(BIOS_LPT3_TIMEOUT,DEFAULTPORTTIMEOUT);
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ppindex++;
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}
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} else if((IO_Read(0x3bc)!=0xff)|(IO_Read(0x3be)!=0xff)) {
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// this is our LPT2
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mem_writew(BIOS_ADDRESS_LPT2,0x3bc);
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mem_writeb(BIOS_LPT2_TIMEOUT,DEFAULTPORTTIMEOUT);
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ppindex++;
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}
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} else if((IO_Read(0x3bc)!=0xff)|(IO_Read(0x3be)!=0xff)) {
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// this is our LPT1
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mem_writew(BIOS_ADDRESS_LPT1,0x3bc);
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mem_writeb(BIOS_LPT1_TIMEOUT,DEFAULTPORTTIMEOUT);
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ppindex++;
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if((IO_Read(0x278)!=0xff)|(IO_Read(0x279)!=0xff)) {
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// this is our LPT2
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mem_writew(BIOS_ADDRESS_LPT2,0x278);
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mem_writeb(BIOS_LPT2_TIMEOUT,DEFAULTPORTTIMEOUT);
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ppindex++;
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}
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}
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else if((IO_Read(0x278)!=0xff)|(IO_Read(0x279)!=0xff)) {
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// this is our LPT1
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mem_writew(BIOS_ADDRESS_LPT1,0x278);
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mem_writeb(BIOS_LPT1_TIMEOUT,DEFAULTPORTTIMEOUT);
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ppindex++;
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}
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/* Setup equipment list */
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// look http://www.bioscentral.com/misc/bda.htm
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//Bitu config=0x4400; //1 Floppy, 2 serial and 1 parrallel
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Bitu config = 0;
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// set number of parallel ports
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// if(ppindex == 0) config |= 0x8000; // looks like 0 ports are not specified
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//else if(ppindex == 1) config |= 0x0000;
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if(ppindex == 2) config |= 0x4000;
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else config |= 0xc000; // 3 ports
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#if (C_FPU)
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//FPU
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config|=0x2;
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@ -534,6 +744,36 @@ public:
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}
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};
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// set com port data in bios data area
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// parameter: array of 4 com port base addresses, 0 = none
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void BIOS_SetComPorts(Bit16u baseaddr[]) {
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Bit8u DEFAULTPORTTIMEOUT = 10; // 10 whatevers
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Bit16u portcount=0;
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Bit16u equipmentword;
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for(Bitu i = 0; i < 4; i++) {
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if(baseaddr[i]!=0) portcount++;
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if(i==0) { // com1
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mem_writew(BIOS_BASE_ADDRESS_COM1,baseaddr[i]);
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mem_writeb(BIOS_COM1_TIMEOUT,DEFAULTPORTTIMEOUT);
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} else if(i==1) {
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mem_writew(BIOS_BASE_ADDRESS_COM2,baseaddr[i]);
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mem_writeb(BIOS_COM2_TIMEOUT,DEFAULTPORTTIMEOUT);
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} else if(i==2) {
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mem_writew(BIOS_BASE_ADDRESS_COM3,baseaddr[i]);
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mem_writeb(BIOS_COM3_TIMEOUT,DEFAULTPORTTIMEOUT);
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} else {
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mem_writew(BIOS_BASE_ADDRESS_COM4,baseaddr[i]);
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mem_writeb(BIOS_COM4_TIMEOUT,DEFAULTPORTTIMEOUT);
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}
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}
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// set equipment word
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equipmentword = mem_readw(BIOS_CONFIGURATION);
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equipmentword &= (~0x0E00);
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equipmentword |= (portcount << 9);
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mem_writew(BIOS_CONFIGURATION,equipmentword);
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}
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static BIOS* test;
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void BIOS_Destroy(Section* sec){
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