Menu
Search

Forums

Forum Index

Thread overview
DM accept use those VGA interrupt?
Nov 15, 2002
zhang li
Nov 15, 2002
KarL
Nov 15, 2002
roland
Nov 15, 2002
roland
Nov 15, 2002
zhang li
Nov 15, 2002
roland
Nov 15, 2002
zhang li
Nov 16, 2002
zhang li
November 15, 2002
Gravatar of zhang liPosted by zhang liReply
zhang li
Gravatar of zhang li


Reply
    Set palette register (Int 10/10)

 INT 10 - VIDEO - (Jr, PS, TANDY 1000, EGA, VGA)
     AX = 1000h
     BL = palette register to set
     BH = color value to store

 Note:   on MCGA, only BX = 0712h is supported

 SeeAlso: AX=1002h,1007h

 --------
 INT 10 - VIDEO - SET BORDER COLOR REGISTER (Jr, PS, TANDY 1000, EGA, VGA)
     AX = 1001h
     BH = color value to store

 SeeAlso: AX=1008h

 --------
 INT 10 - VIDEO - SET ALL PALETTE REGISTERS (Jr, PS, TANDY 1000, EGA, VGA)
     AX = 1002h
     ES:DX -> 17-byte palette register list (see below)

 SeeAlso: AX=1000h,1009h

 Format of palette register list:
 Offset  Size    Description
  00h 16 BYTEs   values for palette registers 0-15
  10h    BYTE    value for border color register

 --------
 INT 10 - VIDEO - TOGGLE INTENSITY/BLINKING BIT (Jr, PS, TANDY 1000,
            EGA, VGA)
     AX = 1003h
     BL = 00h enable intensity
        = 01h enable blink

 --------
 INT 10 - VIDEO - GET INDIVIDUAL PALETTE REGISTER (VGA)
     AX = 1007h
     BL = palette register number

 Return: BH = palette register value

 SeeAlso: AX=1000h,1009h

 --------
 INT 10 - VIDEO - READ OVERSCAN (BORDER COLOR) REGISTER (VGA)
     AX = 1008h

 Return: BH = value

 SeeAlso: AX=1001h

 --------
 INT 10 - VIDEO - READ ALL PALETTE REGISTERS AND OVERSCAN REGISTER (VGA)
     AX = 1009h
     ES:DX -> 17-byte buffer (see AX=1002h)

 SeeAlso: AX=1002h,1007h

 --------
 INT 10 - VIDEO - SET INDIVIDUAL DAC REGISTER (EGA, VGA/MCGA)
     AX = 1010h
     BX = register number
     CH = new value for green (0-63)
     CL = new value for blue (0-63)
     DH = new value for red (0-63)

 SeeAlso: AX=1012h,1015h

 --------
 INT 10 - VIDEO - SET BLOCK OF DAC REGISTERS (EGA, VGA/MCGA)
     AX = 1012h
     BX = starting color register
     CX = number of registers to set
     ES:DX -> table of 3*CX bytes where each 3 byte group represents one
          byte each of red, green and blue (0-63)

 SeeAlso: AX=1010h,1017h

 --------
 INT 10 - VIDEO - SELECT VIDEO DAC COLOR PAGE (VGA)
     AX = 1013h
     BL = 00h Select paging mode
         BH = 00h Select 4 blocks of 64
         BH = 01h Select 16 blocks of 16
     BL = 01h Select Page
         BH = page number (00h to 03h) or (00h to 0Fh)

 Note:   not valid in mode 13h

 SeeAlso: AX=101Ah

 --------
 INT 10 - VIDEO - READ INDIVIDUAL DAC REGISTER (EGA, VGA/MCGA)
     AX = 1015h
     BL = palette register number

 Return: DH = red value
     CH = green value
     CL = blue value

 SeeAlso: AX=1010h,1017h

 --------
 INT 10 - VIDEO - READ BLOCK OF DAC REGISTERS (EGA, VGA/MCGA)
     AX = 1017h
     BX = starting palette register
     CX = number of palette registers to read
     ES:DX -> buffer (3 * CX bytes in size) (see also AX=1012h)

 Return: CX number of red, green and blue triples in buffer

 SeeAlso: AX=1012h,1015h

 --------
 INT 10 - VIDEO - undocumented - SET PEL MASK (EGA, VGA/MCGA)
     AX = 1018h
     BL = new PEL value

 SeeAlso: AX=1019h

 --------
 INT 10 - VIDEO - undocumented - READ PEL MASK (EGA, VGA/MCGA)
     AX = 1019h

 Return: BL = value read

 SeeAlso: AX=1018h

 --------
 INT 10 - VIDEO - GET VIDEO DAC COLOR-PAGE STATE (VGA)
     AX = 101Ah

 Return: BL = paging mode
         00h four pages of 64
         01h sixteen pages of 16
     BH = current page

 SeeAlso: AX=1013h

 --------
 INT 10 - VIDEO - PERFORM GRAY-SCALE SUMMING (EGA, VGA/MCGA)
     AX = 101Bh
     BX = starting palette register
     CX = number of registers to convert

 SeeAlso: AH=12h/BL=33h
November 15, 2002
Gravatar of KarLPosted by KarL
in reply to zhang li		Reply
KarL
Gravatar of KarL
Posted in reply to zhang li


Reply
Not if you write in __ASM

If you use the int wrapper, it will work with DM + all those extenders.

The problem lies with the FS and GS registers that BIOS doesn't know about.  You can't call BIOS without protections.


"zhang li" <li@stands.3322.org> wrote in message news:ar2423$75a$1@digitaldaemon.com...
>
>     Set palette register (Int 10/10)
>
>  INT 10 - VIDEO - (Jr, PS, TANDY 1000, EGA, VGA)
>      AX = 1000h
>      BL = palette register to set
>      BH = color value to store
>
>  Note:   on MCGA, only BX = 0712h is supported
>
>  SeeAlso: AX=1002h,1007h
>
>  --------
>  INT 10 - VIDEO - SET BORDER COLOR REGISTER (Jr, PS, TANDY 1000, EGA, VGA)
>      AX = 1001h
>      BH = color value to store
>
>  SeeAlso: AX=1008h
>
>  --------
>  INT 10 - VIDEO - SET ALL PALETTE REGISTERS (Jr, PS, TANDY 1000, EGA, VGA)
>      AX = 1002h
>      ES:DX -> 17-byte palette register list (see below)
>
>  SeeAlso: AX=1000h,1009h
>
>  Format of palette register list:
>  Offset  Size    Description
>   00h 16 BYTEs   values for palette registers 0-15
>   10h    BYTE    value for border color register
>
>  --------
>  INT 10 - VIDEO - TOGGLE INTENSITY/BLINKING BIT (Jr, PS, TANDY 1000,
>             EGA, VGA)
>      AX = 1003h
>      BL = 00h enable intensity
>         = 01h enable blink
>
>  --------
>  INT 10 - VIDEO - GET INDIVIDUAL PALETTE REGISTER (VGA)
>      AX = 1007h
>      BL = palette register number
>
>  Return: BH = palette register value
>
>  SeeAlso: AX=1000h,1009h
>
>  --------
>  INT 10 - VIDEO - READ OVERSCAN (BORDER COLOR) REGISTER (VGA)
>      AX = 1008h
>
>  Return: BH = value
>
>  SeeAlso: AX=1001h
>
>  --------
>  INT 10 - VIDEO - READ ALL PALETTE REGISTERS AND OVERSCAN REGISTER (VGA)
>      AX = 1009h
>      ES:DX -> 17-byte buffer (see AX=1002h)
>
>  SeeAlso: AX=1002h,1007h
>
>  --------
>  INT 10 - VIDEO - SET INDIVIDUAL DAC REGISTER (EGA, VGA/MCGA)
>      AX = 1010h
>      BX = register number
>      CH = new value for green (0-63)
>      CL = new value for blue (0-63)
>      DH = new value for red (0-63)
>
>  SeeAlso: AX=1012h,1015h
>
>  --------
>  INT 10 - VIDEO - SET BLOCK OF DAC REGISTERS (EGA, VGA/MCGA)
>      AX = 1012h
>      BX = starting color register
>      CX = number of registers to set
>      ES:DX -> table of 3*CX bytes where each 3 byte group represents one
>           byte each of red, green and blue (0-63)
>
>  SeeAlso: AX=1010h,1017h
>
>  --------
>  INT 10 - VIDEO - SELECT VIDEO DAC COLOR PAGE (VGA)
>      AX = 1013h
>      BL = 00h Select paging mode
>          BH = 00h Select 4 blocks of 64
>          BH = 01h Select 16 blocks of 16
>      BL = 01h Select Page
>          BH = page number (00h to 03h) or (00h to 0Fh)
>
>  Note:   not valid in mode 13h
>
>  SeeAlso: AX=101Ah
>
>  --------
>  INT 10 - VIDEO - READ INDIVIDUAL DAC REGISTER (EGA, VGA/MCGA)
>      AX = 1015h
>      BL = palette register number
>
>  Return: DH = red value
>      CH = green value
>      CL = blue value
>
>  SeeAlso: AX=1010h,1017h
>
>  --------
>  INT 10 - VIDEO - READ BLOCK OF DAC REGISTERS (EGA, VGA/MCGA)
>      AX = 1017h
>      BX = starting palette register
>      CX = number of palette registers to read
>      ES:DX -> buffer (3 * CX bytes in size) (see also AX=1012h)
>
>  Return: CX number of red, green and blue triples in buffer
>
>  SeeAlso: AX=1012h,1015h
>
>  --------
>  INT 10 - VIDEO - undocumented - SET PEL MASK (EGA, VGA/MCGA)
>      AX = 1018h
>      BL = new PEL value
>
>  SeeAlso: AX=1019h
>
>  --------
>  INT 10 - VIDEO - undocumented - READ PEL MASK (EGA, VGA/MCGA)
>      AX = 1019h
>
>  Return: BL = value read
>
>  SeeAlso: AX=1018h
>
>  --------
>  INT 10 - VIDEO - GET VIDEO DAC COLOR-PAGE STATE (VGA)
>      AX = 101Ah
>
>  Return: BL = paging mode
>          00h four pages of 64
>          01h sixteen pages of 16
>      BH = current page
>
>  SeeAlso: AX=1013h
>
>  --------
>  INT 10 - VIDEO - PERFORM GRAY-SCALE SUMMING (EGA, VGA/MCGA)
>      AX = 101Bh
>      BX = starting palette register
>      CX = number of registers to convert
>
>  SeeAlso: AH=12h/BL=33h
>
>
>
November 15, 2002
Gravatar of rolandPosted by roland
in reply to KarL		Reply
roland
Gravatar of roland
Posted in reply to KarL


Reply

KarL wrote:

> Not if you write in __ASM
> 
> If you use the int wrapper, it will work with DM + all those extenders.
> 
> The problem lies with the FS and GS registers that BIOS doesn't know
> about.  You can't call BIOS without protections.
> 
> 


????

#define _INTSIZE sizeof(int)

	#if (_INTSIZE==4)			//32 bit DOSX
#define _V_INT(regs) int86_real(0x10,&regs,&regs)
#define _V_INTS(regs,sregs) int86x_real(0x10,&regs,&regs,&sregs)

	#else					//16 bit
#define _V_INT(regs) int86(0x10,&regs,&regs)
#define _V_INTS(regs,sregs) int86x(0x10,&regs,&regs,&sregs)

	#endif

will do the job

roland


> "zhang li" <li@stands.3322.org> wrote in message
> news:ar2423$75a$1@digitaldaemon.com...
> 
>>    Set palette register (Int 10/10)
>>
>> INT 10 - VIDEO - (Jr, PS, TANDY 1000, EGA, VGA)
>>     AX = 1000h
>>     BL = palette register to set
>>     BH = color value to store
>>
>> Note:   on MCGA, only BX = 0712h is supported
>>
>> SeeAlso: AX=1002h,1007h
>>
>> --------
>> INT 10 - VIDEO - SET BORDER COLOR REGISTER (Jr, PS, TANDY 1000, EGA, VGA)
>>     AX = 1001h
>>     BH = color value to store
>>
>> SeeAlso: AX=1008h
>>
>> --------
>> INT 10 - VIDEO - SET ALL PALETTE REGISTERS (Jr, PS, TANDY 1000, EGA, VGA)
>>     AX = 1002h
>>     ES:DX -> 17-byte palette register list (see below)
>>
>> SeeAlso: AX=1000h,1009h
>>
>> Format of palette register list:
>> Offset  Size    Description
>>  00h 16 BYTEs   values for palette registers 0-15
>>  10h    BYTE    value for border color register
>>
>> --------
>> INT 10 - VIDEO - TOGGLE INTENSITY/BLINKING BIT (Jr, PS, TANDY 1000,
>>            EGA, VGA)
>>     AX = 1003h
>>     BL = 00h enable intensity
>>        = 01h enable blink
>>
>> --------
>> INT 10 - VIDEO - GET INDIVIDUAL PALETTE REGISTER (VGA)
>>     AX = 1007h
>>     BL = palette register number
>>
>> Return: BH = palette register value
>>
>> SeeAlso: AX=1000h,1009h
>>
>> --------
>> INT 10 - VIDEO - READ OVERSCAN (BORDER COLOR) REGISTER (VGA)
>>     AX = 1008h
>>
>> Return: BH = value
>>
>> SeeAlso: AX=1001h
>>
>> --------
>> INT 10 - VIDEO - READ ALL PALETTE REGISTERS AND OVERSCAN REGISTER (VGA)
>>     AX = 1009h
>>     ES:DX -> 17-byte buffer (see AX=1002h)
>>
>> SeeAlso: AX=1002h,1007h
>>
>> --------
>> INT 10 - VIDEO - SET INDIVIDUAL DAC REGISTER (EGA, VGA/MCGA)
>>     AX = 1010h
>>     BX = register number
>>     CH = new value for green (0-63)
>>     CL = new value for blue (0-63)
>>     DH = new value for red (0-63)
>>
>> SeeAlso: AX=1012h,1015h
>>
>> --------
>> INT 10 - VIDEO - SET BLOCK OF DAC REGISTERS (EGA, VGA/MCGA)
>>     AX = 1012h
>>     BX = starting color register
>>     CX = number of registers to set
>>     ES:DX -> table of 3*CX bytes where each 3 byte group represents one
>>          byte each of red, green and blue (0-63)
>>
>> SeeAlso: AX=1010h,1017h
>>
>> --------
>> INT 10 - VIDEO - SELECT VIDEO DAC COLOR PAGE (VGA)
>>     AX = 1013h
>>     BL = 00h Select paging mode
>>         BH = 00h Select 4 blocks of 64
>>         BH = 01h Select 16 blocks of 16
>>     BL = 01h Select Page
>>         BH = page number (00h to 03h) or (00h to 0Fh)
>>
>> Note:   not valid in mode 13h
>>
>> SeeAlso: AX=101Ah
>>
>> --------
>> INT 10 - VIDEO - READ INDIVIDUAL DAC REGISTER (EGA, VGA/MCGA)
>>     AX = 1015h
>>     BL = palette register number
>>
>> Return: DH = red value
>>     CH = green value
>>     CL = blue value
>>
>> SeeAlso: AX=1010h,1017h
>>
>> --------
>> INT 10 - VIDEO - READ BLOCK OF DAC REGISTERS (EGA, VGA/MCGA)
>>     AX = 1017h
>>     BX = starting palette register
>>     CX = number of palette registers to read
>>     ES:DX -> buffer (3 * CX bytes in size) (see also AX=1012h)
>>
>> Return: CX number of red, green and blue triples in buffer
>>
>> SeeAlso: AX=1012h,1015h
>>
>> --------
>> INT 10 - VIDEO - undocumented - SET PEL MASK (EGA, VGA/MCGA)
>>     AX = 1018h
>>     BL = new PEL value
>>
>> SeeAlso: AX=1019h
>>
>> --------
>> INT 10 - VIDEO - undocumented - READ PEL MASK (EGA, VGA/MCGA)
>>     AX = 1019h
>>
>> Return: BL = value read
>>
>> SeeAlso: AX=1018h
>>
>> --------
>> INT 10 - VIDEO - GET VIDEO DAC COLOR-PAGE STATE (VGA)
>>     AX = 101Ah
>>
>> Return: BL = paging mode
>>         00h four pages of 64
>>         01h sixteen pages of 16
>>     BH = current page
>>
>> SeeAlso: AX=1013h
>>
>> --------
>> INT 10 - VIDEO - PERFORM GRAY-SCALE SUMMING (EGA, VGA/MCGA)
>>     AX = 101Bh
>>     BX = starting palette register
>>     CX = number of registers to convert
>>
>> SeeAlso: AH=12h/BL=33h
>>
>>
>>
>>
> 
>
November 15, 2002
Gravatar of rolandPosted by roland
in reply to roland		Reply
roland
Gravatar of roland
Posted in reply to roland


Reply

roland wrote:

> 
> 
> #define _INTSIZE sizeof(int)
> 
>     #if (_INTSIZE==4)            //32 bit DOSX
> #define _V_INT(regs) int86_real(0x10,&regs,&regs)
> #define _V_INTS(regs,sregs) int86x_real(0x10,&regs,&regs,&sregs)
> 
>     #else                    //16 bit
> #define _V_INT(regs) int86(0x10,&regs,&regs)
> #define _V_INTS(regs,sregs) int86x(0x10,&regs,&regs,&sregs)
> 
>     #endif
> 
> will do the job
> 
> roland
> 

just i have a little doubt about interrupts where you have to pass a buffer (int 10h fc 1002h for example).
if it does not work like this, allocate a buffer below the 1M limit.
see

www.digitalmars.com/faq.html#realbuffer

roland

> 
>> "zhang li" <li@stands.3322.org> wrote in message
>> news:ar2423$75a$1@digitaldaemon.com...
>>
>>>    Set palette register (Int 10/10)
>>>
>>> INT 10 - VIDEO - (Jr, PS, TANDY 1000, EGA, VGA)
>>>     AX = 1000h
>>>     BL = palette register to set
>>>     BH = color value to store
>>>
>>> Note:   on MCGA, only BX = 0712h is supported
>>>
>>> SeeAlso: AX=1002h,1007h
>>>
>>> --------
>>> INT 10 - VIDEO - SET BORDER COLOR REGISTER (Jr, PS, TANDY 1000, EGA, VGA)
>>>     AX = 1001h
>>>     BH = color value to store
>>>
>>> SeeAlso: AX=1008h
>>>
>>> --------
>>> INT 10 - VIDEO - SET ALL PALETTE REGISTERS (Jr, PS, TANDY 1000, EGA, VGA)
>>>     AX = 1002h
>>>     ES:DX -> 17-byte palette register list (see below)
>>>
>>> SeeAlso: AX=1000h,1009h
>>>
>>> Format of palette register list:
>>> Offset  Size    Description
>>>  00h 16 BYTEs   values for palette registers 0-15
>>>  10h    BYTE    value for border color register
>>>
>>> --------
>>> INT 10 - VIDEO - TOGGLE INTENSITY/BLINKING BIT (Jr, PS, TANDY 1000,
>>>            EGA, VGA)
>>>     AX = 1003h
>>>     BL = 00h enable intensity
>>>        = 01h enable blink
>>>
>>> --------
>>> INT 10 - VIDEO - GET INDIVIDUAL PALETTE REGISTER (VGA)
>>>     AX = 1007h
>>>     BL = palette register number
>>>
>>> Return: BH = palette register value
>>>
>>> SeeAlso: AX=1000h,1009h
>>>
>>> --------
>>> INT 10 - VIDEO - READ OVERSCAN (BORDER COLOR) REGISTER (VGA)
>>>     AX = 1008h
>>>
>>> Return: BH = value
>>>
>>> SeeAlso: AX=1001h
>>>
>>> --------
>>> INT 10 - VIDEO - READ ALL PALETTE REGISTERS AND OVERSCAN REGISTER (VGA)
>>>     AX = 1009h
>>>     ES:DX -> 17-byte buffer (see AX=1002h)
>>>
>>> SeeAlso: AX=1002h,1007h
>>>
>>> --------
>>> INT 10 - VIDEO - SET INDIVIDUAL DAC REGISTER (EGA, VGA/MCGA)
>>>     AX = 1010h
>>>     BX = register number
>>>     CH = new value for green (0-63)
>>>     CL = new value for blue (0-63)
>>>     DH = new value for red (0-63)
>>>
>>> SeeAlso: AX=1012h,1015h
>>>
>>> --------
>>> INT 10 - VIDEO - SET BLOCK OF DAC REGISTERS (EGA, VGA/MCGA)
>>>     AX = 1012h
>>>     BX = starting color register
>>>     CX = number of registers to set
>>>     ES:DX -> table of 3*CX bytes where each 3 byte group represents one
>>>          byte each of red, green and blue (0-63)
>>>
>>> SeeAlso: AX=1010h,1017h
>>>
>>> --------
>>> INT 10 - VIDEO - SELECT VIDEO DAC COLOR PAGE (VGA)
>>>     AX = 1013h
>>>     BL = 00h Select paging mode
>>>         BH = 00h Select 4 blocks of 64
>>>         BH = 01h Select 16 blocks of 16
>>>     BL = 01h Select Page
>>>         BH = page number (00h to 03h) or (00h to 0Fh)
>>>
>>> Note:   not valid in mode 13h
>>>
>>> SeeAlso: AX=101Ah
>>>
>>> --------
>>> INT 10 - VIDEO - READ INDIVIDUAL DAC REGISTER (EGA, VGA/MCGA)
>>>     AX = 1015h
>>>     BL = palette register number
>>>
>>> Return: DH = red value
>>>     CH = green value
>>>     CL = blue value
>>>
>>> SeeAlso: AX=1010h,1017h
>>>
>>> --------
>>> INT 10 - VIDEO - READ BLOCK OF DAC REGISTERS (EGA, VGA/MCGA)
>>>     AX = 1017h
>>>     BX = starting palette register
>>>     CX = number of palette registers to read
>>>     ES:DX -> buffer (3 * CX bytes in size) (see also AX=1012h)
>>>
>>> Return: CX number of red, green and blue triples in buffer
>>>
>>> SeeAlso: AX=1012h,1015h
>>>
>>> --------
>>> INT 10 - VIDEO - undocumented - SET PEL MASK (EGA, VGA/MCGA)
>>>     AX = 1018h
>>>     BL = new PEL value
>>>
>>> SeeAlso: AX=1019h
>>>
>>> --------
>>> INT 10 - VIDEO - undocumented - READ PEL MASK (EGA, VGA/MCGA)
>>>     AX = 1019h
>>>
>>> Return: BL = value read
>>>
>>> SeeAlso: AX=1018h
>>>
>>> --------
>>> INT 10 - VIDEO - GET VIDEO DAC COLOR-PAGE STATE (VGA)
>>>     AX = 101Ah
>>>
>>> Return: BL = paging mode
>>>         00h four pages of 64
>>>         01h sixteen pages of 16
>>>     BH = current page
>>>
>>> SeeAlso: AX=1013h
>>>
>>> --------
>>> INT 10 - VIDEO - PERFORM GRAY-SCALE SUMMING (EGA, VGA/MCGA)
>>>     AX = 101Bh
>>>     BX = starting palette register
>>>     CX = number of registers to convert
>>>
>>> SeeAlso: AH=12h/BL=33h
>>>
>>>
>>>
>>>
>>
>>
>
November 15, 2002
Gravatar of zhang liPosted by zhang li
in reply to roland		Reply
zhang li
Gravatar of zhang li
Posted in reply to roland


Reply
>
> just i have a little doubt about interrupts where you have to pass a
> buffer (int 10h fc 1002h for example).
> if it does not work like this, allocate a buffer below the 1M limit.
> see
>
> www.digitalmars.com/faq.html#realbuffer
>
> roland
>

At DOS video memory is map to a 64 kb frame on 0xb000:0.
dosX can directly read/write video memory address?
I need address map of dosX.

Thanks

li
November 15, 2002
Gravatar of zhang liPosted by zhang li
in reply to roland		Reply
zhang li
Gravatar of zhang li
Posted in reply to roland


Reply
> just i have a little doubt about interrupts where you have to pass a
> buffer (int 10h fc 1002h for example).
> if it does not work like this, allocate a buffer below the 1M limit.
> see
>
> www.digitalmars.com/faq.html#realbuffer
>
> roland
>

In this example, maybe don't need allocate memory, use this idea maybe pass.

#define PUSHALL \
  asm { \
   push ax; \
   push bx; \
   push cx; \
   push dx; \
   push es; \
   push ds; \
   push si; \
   push di; \
   push bp; \
  }


#define POPALL \
  asm { \
   pop bp; \
   pop di; \
   pop si; \
   pop ds; \
   pop es; \
   pop dx; \
   pop cx; \
   pop bx; \
   pop ax; \
  }

copyRegs( int ss, int sp )
{
    char far *s = ;
    memcpy( MK_FP(ss,sp), regSet );
}

main()
{
PUSHALL
copyRegs( _SS, _SP );
POPALL
asm int 0x10;
PUSHALL
keepRegs( _SS, _SP );
POPALL
}

li
November 15, 2002
Gravatar of rolandPosted by roland
in reply to zhang li		Reply
roland
Gravatar of roland
Posted in reply to zhang li


Reply

zhang li wrote:

>>just i have a little doubt about interrupts where you have to pass a
>>buffer (int 10h fc 1002h for example).
>>if it does not work like this, allocate a buffer below the 1M limit.
>>see
>>
>>www.digitalmars.com/faq.html#realbuffer
>>
>>roland
>>
>>
> 
> At DOS video memory is map to a 64 kb frame on 0xb000:0.
> dosX can directly read/write video memory address?


yes


> I need address map of dosX.
> 

see

http://www.digitalmars.com/faq.html#vram


regards


roland
November 16, 2002
Gravatar of zhang liPosted by zhang li
in reply to zhang li		Reply
zhang li
Gravatar of zhang li
Posted in reply to zhang li


Reply
A warn about use BP register.
C/C++ often access stack by BP register.
so do not change it.

instead of a "asm pushf" and "asm popf" to keep running flags register.

li.


"zhang li" <li@stands.3322.org> дÈëÏûÏ¢ÐÂÎÅ :ar2rmb$1064$1@digitaldaemon.com...
>
> > just i have a little doubt about interrupts where you have to pass a
> > buffer (int 10h fc 1002h for example).
> > if it does not work like this, allocate a buffer below the 1M limit.
> > see
> >
> > www.digitalmars.com/faq.html#realbuffer
> >
> > roland
> >
>
> In this example, maybe don't need allocate memory, use this idea maybe
pass.
>
> #define PUSHALL \
>   asm { \
>    push ax; \
>    push bx; \
>    push cx; \
>    push dx; \
>    push es; \
>    push ds; \
>    push si; \
>    push di; \
>    push bp; \
>   }
>
>
> #define POPALL \
>   asm { \
>    pop bp; \
>    pop di; \
>    pop si; \
>    pop ds; \
>    pop es; \
>    pop dx; \
>    pop cx; \
>    pop bx; \
>    pop ax; \
>   }
>
> copyRegs( int ss, int sp )
> {
>     char far *s = ;
>     memcpy( MK_FP(ss,sp), regSet );
> }
>
> main()
> {
> PUSHALL
> copyRegs( _SS, _SP );
> POPALL
> asm int 0x10;
> PUSHALL
> keepRegs( _SS, _SP );
> POPALL
> }
>
> li
>
>