115 lines
3.0 KiB
Plaintext
115 lines
3.0 KiB
Plaintext
----------------------------------------------------------------------
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Patch name: patch.rombios-vitaly-vorobyov
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Author: Vitaly Vorobyov
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Date: 03/08/2003
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Status: New
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Detailed description:
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PATCH 1: ROMBIOS fix
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[x] int vector 0x79 is set to 0:0 instead of dummy iret
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instruction.
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Zero value of this vector is checked by 'gardian angel'
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protection system, on real computer this vector is zero and
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'gardian angel' use it as antidebugging trick.
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[x] int 0x16 service 05 realized
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Patch was created with:
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cvs diff -u
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Apply patch to what version:
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cvs checked out on 3 Aug 2003
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Instructions:
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To patch, go to main bochs directory.
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Type "patch -p0 < THIS_PATCH_FILE".
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----------------------------------------------------------------------
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Index: bios/rombios.c
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===================================================================
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RCS file: /cvsroot/bochs/bochs/bios/rombios.c,v
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retrieving revision 1.93
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diff -u -r1.93 rombios.c
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--- bios/rombios.c 25 Apr 2003 22:13:24 -0000 1.93
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+++ bios/rombios.c 4 Aug 2003 14:33:47 -0000
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@@ -877,7 +877,7 @@
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//static Bit16u get_DS();
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//static void set_DS();
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static Bit16u get_SS();
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-static void enqueue_key();
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+static bx_bool enqueue_key();
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static unsigned int dequeue_key();
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static void get_hd_geometry();
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static void set_diskette_ret_status();
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@@ -3953,6 +3953,13 @@
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SET_AL(shift_flags);
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break;
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+ case 0x05:
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+ if(!enqueue_key( CX>>4, CX)) {
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+ SET_AL(1);
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+ return;
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+ }
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+ SET_AL(0);
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+ break;
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case 0x09: /* GET KEYBOARD FUNCTIONALITY */
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// bit Bochs Description
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// 7 0 reserved
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@@ -4327,7 +4334,7 @@
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mf2_state &= ~0x01;
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}
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- void
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+bx_bool
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enqueue_key(scan_code, ascii_code)
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Bit8u scan_code, ascii_code;
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{
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@@ -4355,12 +4362,13 @@
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if (buffer_tail == buffer_head) {
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BX_PANIC("KBD: dropped key scan=%02x, ascii=%02x\n",
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(int) scan_code, (int) ascii_code);
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- return;
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+ return 0;
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}
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write_byte(0x0040, temp_tail, ascii_code);
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write_byte(0x0040, temp_tail+1, scan_code);
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write_word(0x0040, 0x001C, buffer_tail);
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+ return 1;
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}
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@@ -6211,6 +6219,7 @@
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{
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Bit8u val8, dor;
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Bit16u curr_cyl_offset;
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+// Bit8u master_mask;
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// set 40:3e bit 7 to 0
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val8 = read_byte(0x0000, 0x043e);
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@@ -6301,6 +6310,7 @@
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Bit8u return_status[7];
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Bit8u drive_type, num_floppies, ah;
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Bit16u es, last_addr;
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+// Bit8u master_mask;
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BX_DEBUG_INT13_FL("int13_diskette: AX=%04x BX=%04x CX=%04x DX=%04x ES=%04x\n", AX, BX, CX, DX, ES);
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// BX_DEBUG_INT13_FL("int13_diskette: SS=%04x DS=%04x ES=%04x DI=%04x SI=%04x\n",get_SS(), get_DS(), ES, DI, SI);
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@@ -6804,6 +6814,7 @@
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ASM_START
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cli
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ASM_END
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+
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// set 40:3e bit 7 to 0
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val8 = read_byte(0x0000, 0x043e);
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val8 &= 0x7f;
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@@ -8724,6 +8735,10 @@
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inc bx
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inc bx
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loop post_default_ints
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+
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+ ;; set vector 0x79 to zero
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+ ;; this is used by 'gardian angel' protection system
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+ mov dword ptr [0x1e4], #0
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;; base memory in K 40:13 (word)
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mov ax, #BASE_MEM_IN_K
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