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30 * BSDI int2f.c,v 2.2 1996/04/08 19:32:53 bostic Exp
39 ** Multiplex interrupt.
41 ** subfunctions 0-0x7f reserved for DOS, some are implemented here.
46 ** 2f:00 2f:01 2f:02 2f:03
48 ** Various PRINT.COM functions
51 int2f_printer(regcontext_t *REGS)
53 debug (D_FILE_OPS, "Called printer function 0x%02x", R_AH);
54 R_AL = FUNC_NUM_IVALID;
60 ** DOS internal functions. Only one we support is 0x2e, and then only to
64 int2f_dosinternal(regcontext_t *REGS)
67 case 0x2e: /* XXX - GET/SET ERROR TABLE ADDRESSES */
73 debug(D_ALWAYS,"DOS program attempted to get internal error table.\n");
81 debug(D_ALWAYS,"DOS program attempted to set error table.\n");
86 unknown_int4(0x2f, 0x12, R_AL, R_DL, REGS);
89 R_AL = FUNC_NUM_IVALID;
96 ** Windows Enhanced Mode functions. Aigh!
99 int2f_windows(regcontext_t *REGS)
103 R_AL = 0x00; /* Neither Win 3.x nor 2.x running */
106 case 0x80: /* installation check */
112 unknown_int3(0x2f, 0x16, R_AL, REGS);
115 R_AL = FUNC_NUM_IVALID;
125 int2f_xms(regcontext_t *REGS)
128 case 0: /* installation check */
129 return(0); /* %al = 0 */
131 R_AL = FUNC_NUM_IVALID;
137 static struct intfunc_table int2f_table[] = {
139 { 0x00, IFT_NOSUBFUNC, int2f_printer, "printer"},
140 { 0x01, IFT_NOSUBFUNC, int2f_printer, "printer"},
141 { 0x02, IFT_NOSUBFUNC, int2f_printer, "printer"},
142 { 0x03, IFT_NOSUBFUNC, int2f_printer, "printer"},
143 { 0x12, IFT_NOSUBFUNC, int2f_dosinternal, "DOS internal function"},
144 { 0x16, IFT_NOSUBFUNC, int2f_windows, "Windows detect"},
145 { 0x43, IFT_NOSUBFUNC, int2f_xms, "XMS"},
150 ** int2f (multiplex) handler.
152 ** Note that due to the widely varied and inconsistent conventions, handlers
153 ** called from here are expected to manage their own return values.
156 int2f(regcontext_t *REGS)
160 /* look up the handler for the current function */
161 index = intfunc_search(int2f_table, R_AH, R_AL);
163 if (index >= 0) { /* respond on multiplex chain */
164 int2f_table[index].handler(REGS);
166 unknown_int2(0x2f, R_AH, REGS);