Copies the processor registers.
GetRegs
GetRegs copies the content of the processor registers to the pseudo register variables _EAX, _EBX, etc.
The pseudo register variables are used to inspect processor registers and to pass values to assembler routines.
_EAX, _EBX, _ECX, _EDX, _ESI, _EDI, _EBP, _ESP, _EFL, _EIP
_AX, _BX, _CX, _DX, _SI, _DI, _BP, _SP, _FL, _IP
_CS, _DS, _ES, _FS, _GS, _SS
_AH, _AL, _BH, _BL, _CH, _CL, _DH, _DL
The top eight are the pseudo register variables of GFA-BASIC 32. They can be filled using the GetRegs command. GetRegs copies the values and state of each register processor in its corresponding variable. The value of the eax register is copied to _EAX, the ecx register to _ECX, etc.
For four registers, eax, ebx, ecx, and edx, the LoWord, and the LoByte and HiByte of the LoWord can be read and set individually. The table below shows the meaning and the relationship of the pseudo register variables.
| Register | Lo Byte 8 bit | Hi Byte 8 bit | Lo Word 16 bit | Register 32 bit |
|---|---|---|---|---|
| accumulations register | _AL | _AH | _AX | _EAX |
| base register | _BL | _BH | _BX | _EBX |
| count register | _CL | _CH | _CX | _ECX |
| data register | _DL | _DH | _DX | _EDX |
| source index register | _SI | _ESI | ||
| destination index register | _DI | _EDI | ||
| base pointer register | _BP | _EBP | ||
| stack register | _SP | _ESP | ||
| flag register | _FL | _EFL | ||
| extended instruction pointer | _EIP | |||
| only for the 16 bit operating | _IP | |||
| code segment register | _CS | |||
| data segment register | _DS | |||
| extra segment register | _ES | |||
| extra segment register | _FS | |||
| extra segment register | _GS | |||
| stack segment register | _SS | |||
| carry flag | _CY |
When an assembler routine is invoked, the registers can be initialized at the calling. The Call(X) command allows passing values by pseudo register variable.
Call(addr) ( _EAX = 1, _ECX = 2)
Further more, some GFA-BASIC 32 commands return values in a pseudo variable. For instance Dlg Font returns the size in point in _DX and the font type in _SI. All Dlg-common dialog commands return an error condition in _AX.
Dim cur As Currency
cur = 1000
GetRegs : Print _EAX, _EDX
output of two register after addition to one Currency variable
You are free to use the pseudo variables as (global) variables to store temporarily information.
{Created by Sjouke Hamstra; Last updated: 01/09/2021 by James Gaite; Other Contributors: Jean-Marie Melanson}