| 39,12 → 39,20 |
|---|
| unsigned short far *owner; |
| const unsigned short sizeof_rmodandprops_paras = rmod_len + sizeof(struct rmod_props) + 15 / 16; |
| unsigned short rmodseg = 0xffff; |
| unsigned short envseg, origenvseg; |
| unsigned short envseg = 0, origenvseg = 0; |
| struct rmod_props far *res = NULL; |
| |
| /* read my current env segment from PSP and save it */ |
| envseg = *((unsigned short *)0x2c); |
| origenvseg = envseg; |
| _asm { |
| push ax |
| push bx |
| mov bx, 0x2c |
| mov ax, [bx] |
| mov envseg, ax |
| mov origenvseg, ax |
| pop bx |
| pop ax |
| } |
| |
| /* printf("original (PSP) env buffer at %04X\r\n", envseg); */ |
| |
| 57,6 → 65,7 |
|---|
| envsize /= 16; |
| } |
| |
| |
| _asm { |
| /* link in the UMB memory chain for enabling high-memory allocation (and save initial status on stack) */ |
| mov ax, 0x5802 /* GET UMB LINK STATE */ |
| 167,10 → 176,24 |
|---|
| |
| /* set the int22 handler in my PSP to rmod so DOS jumps to rmod after I |
| * terminate and save the original handler in rmod's memory */ |
| { |
| unsigned short *ptr = (void *)0x0a; /* int22 handler is at 0x0A of the PSP */ |
| ptr[0] = RMOD_OFFSET_ROUTINE; |
| ptr[1] = rmodseg; |
| _asm { |
| push ax |
| push bx |
| push si |
| push di |
| push es |
| |
| mov bx, 0x0a /* int22 handler is at 0x0A of the PSP */ |
| mov ax, RMOD_OFFSET_ROUTINE |
| mov [bx], ax /* int handler offset */ |
| mov ax, rmodseg |
| mov [bx+2], ax /* int handler segment */ |
| |
| pop es |
| pop di |
| pop si |
| pop bx |
| pop ax |
| } |
| |
| return(res); |