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Diffstat (limited to 'board/MAI/bios_emulator/scitech/src/pm/tests/callreal.c')
-rw-r--r-- | board/MAI/bios_emulator/scitech/src/pm/tests/callreal.c | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/board/MAI/bios_emulator/scitech/src/pm/tests/callreal.c b/board/MAI/bios_emulator/scitech/src/pm/tests/callreal.c new file mode 100644 index 00000000000..3897ce99993 --- /dev/null +++ b/board/MAI/bios_emulator/scitech/src/pm/tests/callreal.c @@ -0,0 +1,107 @@ +/**************************************************************************** +* +* SciTech OS Portability Manager Library +* +* ======================================================================== +* +* The contents of this file are subject to the SciTech MGL Public +* License Version 1.0 (the "License"); you may not use this file +* except in compliance with the License. You may obtain a copy of +* the License at http://www.scitechsoft.com/mgl-license.txt +* +* Software distributed under the License is distributed on an +* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or +* implied. See the License for the specific language governing +* rights and limitations under the License. +* +* The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc. +* +* The Initial Developer of the Original Code is SciTech Software, Inc. +* All Rights Reserved. +* +* ======================================================================== +* +* Language: ANSI C +* Environment: any +* +* Description: Test program to check the ability to call a real mode +* procedure. We simply copy a terribly simple assembly +* language routine into a real mode block that we allocate, +* and then attempt to call the routine and verify that it +* was successful. +* +* Functions tested: PM_allocRealSeg() +* PM_freeRealSeg() +* PM_callRealMode() +* +****************************************************************************/ + +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include "pmapi.h" + +/* Block of real mode code we will eventually call */ + +static unsigned char realModeCode[] = { + 0x93, /* xchg ax,bx */ + 0x87, 0xCA, /* xchg cx,dx */ + 0xCB /* retf */ + }; + +int main(void) +{ + RMREGS regs; + RMSREGS sregs; + uchar *p; + unsigned r_seg,r_off; + + printf("Program running in "); + switch (PM_getModeType()) { + case PM_realMode: + printf("real mode.\n\n"); + break; + case PM_286: + printf("16 bit protected mode.\n\n"); + break; + case PM_386: + printf("32 bit protected mode.\n\n"); + break; + } + + /* Allocate a the block of real mode memory */ + if ((p = PM_allocRealSeg(sizeof(realModeCode), &r_seg, &r_off)) == NULL) { + printf("Unable to allocate real mode memory!\n"); + exit(1); + } + + /* Copy the real mode code */ + memcpy(p,realModeCode,sizeof(realModeCode)); + + /* Now call the real mode code */ + regs.x.ax = 1; + regs.x.bx = 2; + regs.x.cx = 3; + regs.x.dx = 4; + regs.x.si = 5; + regs.x.di = 6; + sregs.es = 7; + sregs.ds = 8; + PM_callRealMode(r_seg,r_off,®s,&sregs); + if (regs.x.ax != 2 || regs.x.bx != 1 || regs.x.cx != 4 || regs.x.dx != 3 + || regs.x.si != 5 || regs.x.di != 6 || sregs.es != 7 + || sregs.ds != 8) { + printf("Real mode call failed!\n"); + printf("\n"); + printf("ax = %04X, bx = %04X, cx = %04X, dx = %04X\n", + regs.x.ax,regs.x.bx,regs.x.cx,regs.x.dx); + printf("si = %04X, di = %04X, es = %04X, ds = %04X\n", + regs.x.si,regs.x.di,sregs.es,sregs.ds); + } + else + printf("Real mode call succeeded!\n"); + + /* Free the memory we allocated */ + PM_freeRealSeg(p); + return 0; +} |