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Diffstat (limited to 'src/mame/machine/pacplus.cpp')
-rw-r--r--src/mame/machine/pacplus.cpp56
1 files changed, 0 insertions, 56 deletions
diff --git a/src/mame/machine/pacplus.cpp b/src/mame/machine/pacplus.cpp
deleted file mode 100644
index 67e09c92552..00000000000
--- a/src/mame/machine/pacplus.cpp
+++ /dev/null
@@ -1,56 +0,0 @@
-// license:BSD-3-Clause
-// copyright-holders:Nicola Salmoria
-#include "emu.h"
-#include "includes/pacman.h"
-
-
-uint8_t pacman_state::pacplus_decrypt(int addr, uint8_t e)
-{
- static const uint8_t swap_xor_table[6][9] =
- {
- { 7,6,5,4,3,2,1,0, 0x00 },
- { 7,6,5,4,3,2,1,0, 0x28 },
- { 6,1,3,2,5,7,0,4, 0x96 },
- { 6,1,5,2,3,7,0,4, 0xbe },
- { 0,3,7,6,4,2,1,5, 0xd5 },
- { 0,3,4,6,7,2,1,5, 0xdd }
- };
- static const int picktable[32] =
- {
- 0,2,4,2,4,0,4,2,2,0,2,2,4,0,4,2,
- 2,2,4,0,4,2,4,0,0,4,0,4,4,2,4,2
- };
- uint32_t method = 0;
- const uint8_t *tbl;
-
-
- /* pick method from bits 0 2 5 7 9 of the address */
- method = picktable[
- (addr & 0x001) |
- ((addr & 0x004) >> 1) |
- ((addr & 0x020) >> 3) |
- ((addr & 0x080) >> 4) |
- ((addr & 0x200) >> 5)];
-
- /* switch method if bit 11 of the address is set */
- if ((addr & 0x800) == 0x800)
- method ^= 1;
-
- tbl = swap_xor_table[method];
- return bitswap<8>(e,tbl[0],tbl[1],tbl[2],tbl[3],tbl[4],tbl[5],tbl[6],tbl[7]) ^ tbl[8];
-}
-
-
-void pacman_state::pacplus_decode()
-{
- int i;
- uint8_t *RAM;
-
- /* CPU ROMs */
-
- RAM = memregion("maincpu")->base();
- for (i = 0; i < 0x4000; i++)
- {
- RAM[i] = pacplus_decrypt(i,RAM[i]);
- }
-}