en:ibm:prcp:vio:getphysbuf

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en:ibm:prcp:vio:getphysbuf [2016/09/14 09:29]
valerius created
en:ibm:prcp:vio:getphysbuf [2016/09/15 05:14] (current)
valerius
Line 1: Line 1:
 ==== VioGetPhysBuf==== ==== VioGetPhysBuf====
  
-**Bindings**:​ C, MASM +**Bindings**: ​[[getphysbuf#​bindings|C]][[getphysbuf#​MASM bindings|MASM]]
  
 This call gets addressability to the physical display buffer. ​ This call gets addressability to the physical display buffer. ​
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 The buffer range specified for the physical screen buffer must fall between hex '​A0000'​ and '​BFFFF'​ inclusive. An application may issue [[en:​ibm:​prcp:​vio:​getphysbuf|VioGetPhysBuf]] only when it is running in the foreground. An application may issue [[en:​ibm:​prcp:​vio:​getphysbuf|VioGetPhysBuf]] more than once.  The buffer range specified for the physical screen buffer must fall between hex '​A0000'​ and '​BFFFF'​ inclusive. An application may issue [[en:​ibm:​prcp:​vio:​getphysbuf|VioGetPhysBuf]] only when it is running in the foreground. An application may issue [[en:​ibm:​prcp:​vio:​getphysbuf|VioGetPhysBuf]] more than once. 
 +
 +=== C bindings ===
 +
 +<code c>
 +typedef struct _VIOPHYSBUF {   /* viopb */
 +  PBYTE    pBuf;               /* Buffer start address */
 +  ULONG    cb;                 /* Buffer length */
 +  SEL      asel[1]; ​           /* Selector list */
 +} VIOPHYSBUF;
 +
 +#define INCL_VIO
 +
 +USHORT ​ rc = VioGetPhysBuf(Structure,​ Reserved);
 +
 +PVIOPHYSBUF ​     Structure; ​    /* Data structure */
 +USHORT ​          ​Reserved; ​     /* Reserved (must be zero) */
 +
 +USHORT ​          ​rc; ​           /* return code */
 +</​code>​
 +
 +=== MASM bindings ===
 +
 +<code asm>
 +VIOPHYSBUF struc
 +  viopb_pBuf dd  ? ;Buffer start address
 +  viopb_cb ​  ​dd ​ ? ;buffer length
 +  viopb_asel dw  1 dup (?) ;selector list
 +VIOPHYSBUF ends
 +
 +EXTRN  VioGetPhysBuf:​FAR
 +INCL_VIO ​           EQU 1
 +
 +PUSH@  OTHER   ​Structure ​    ;Data structure
 +PUSH   ​WORD ​   Reserved ​     ;Reserved (must be zero)
 +CALL   ​VioGetPhysBuf
 +
 +Returns WORD
 +</​code>​
  

en/ibm/prcp/vio/getphysbuf.txt · Last modified: 2016/09/15 05:14 by valerius