diff options
Diffstat (limited to 'src/mame/old/sbp_prot.cpp')
-rw-r--r-- | src/mame/old/sbp_prot.cpp | 87 |
1 files changed, 0 insertions, 87 deletions
diff --git a/src/mame/old/sbp_prot.cpp b/src/mame/old/sbp_prot.cpp deleted file mode 100644 index 1f044c64fda..00000000000 --- a/src/mame/old/sbp_prot.cpp +++ /dev/null @@ -1,87 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:S. Smith,David Haywood - - -#include "emu.h" -#include "sbp_prot.h" - - - -const device_type SBP_PROT = device_creator<sbp_prot_device>; - - -sbp_prot_device::sbp_prot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) - : device_t(mconfig, SBP_PROT, "NeoGeo Protection (Super Bubble Pop)", tag, owner, clock, "sbp_prot", __FILE__), - m_mainrom(nullptr) -{ -} - - -void sbp_prot_device::device_start() -{ -} - -void sbp_prot_device::device_reset() -{ -} - - - -READ16_MEMBER( sbp_prot_device::sbp_lowerrom_r ) -{ - uint16_t* rom = (uint16_t*)m_mainrom; - uint16_t origdata = rom[(offset+(0x200/2))]; - uint16_t data = BITSWAP16(origdata, 11,10,9,8,15,14,13,12,3,2,1,0,7,6,5,4); - int realoffset = 0x200+(offset*2); - logerror("sbp_lowerrom_r offset %08x data %04x\n", realoffset, data ); - - // there is actually data in the rom here already, maybe we should just return it 'as is' - if (realoffset==0xd5e) return origdata; - - return data; -} - -WRITE16_MEMBER( sbp_prot_device::sbp_lowerrom_w ) -{ - int realoffset = 0x200+(offset*2); - - // the actual data written is just pulled from the end of the rom, and unused space - // maybe this is just some kind of watchdog for the protection device and it doesn't - // matter? - if (realoffset == 0x1080) - { - if (data==0x4e75) - { - return; - } - else if (data==0xffff) - { - return; - } - } - - printf("sbp_lowerrom_w offset %08x data %04x\n", realoffset, data ); -} - - -void sbp_prot_device::sbp_install_protection(cpu_device* maincpu, uint8_t* cpurom, uint32_t cpurom_size) -{ - m_mainrom = cpurom; - - // there seems to be a protection device living around here.. - // if you nibble swap the data in the rom the game will boot - // there are also writes to 0x1080.. - // - // other stuff going on as well tho, the main overlay is still missing, and p1 inputs don't work - maincpu->space(AS_PROGRAM).install_read_handler(0x00200, 0x001fff, read16_delegate(FUNC(sbp_prot_device::sbp_lowerrom_r), this)); - maincpu->space(AS_PROGRAM).install_write_handler(0x00200, 0x001fff, write16_delegate(FUNC(sbp_prot_device::sbp_lowerrom_w), this)); - - /* the game code clears the text overlay used ingame immediately after writing it.. why? protection? sloppy code that the hw ignores? imperfect emulation? */ - { - uint16_t* rom = (uint16_t*)cpurom; - - rom[0x2a6f8 / 2] = 0x4e71; - rom[0x2a6fa / 2] = 0x4e71; - rom[0x2a6fc / 2] = 0x4e71; - } -} |