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naomi: give the ability to activate the cpus in the dimm board to test it (nw)

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In naomigh.h change constant work_mode to 1 and build again.
For now it cannot access the gdrom drive but the communication with the
pic should work (routine at c0273cc in the default bios)
This commit is contained in:
yz70s 2020-01-06 18:04:52 +01:00
parent 8f5708017f
commit 37d163cd1b
2 changed files with 27 additions and 8 deletions
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33
src/mame/machine/naomigd.cpp
View File

@ -493,7 +493,7 @@ WRITE32_MEMBER(naomi_gdrom_board::memorymanager_w)
else
src = src + 0x0c000000;
dst = dst - 0x10000000;
ddtdata.buffer = dimm_data + dst; // TODO: access des encrypted data
ddtdata.buffer = dimm_des_data + dst;
ddtdata.source = src;
ddtdata.length = len;
ddtdata.size = 4;
@ -510,7 +510,7 @@ WRITE32_MEMBER(naomi_gdrom_board::memorymanager_w)
else
dst = dst + 0xc000000;
src = src - 0x10000000;
ddtdata.buffer = dimm_data + src; // TODO: access des encrypted data
ddtdata.buffer = dimm_des_data + src;
ddtdata.destination = dst;
ddtdata.length = len;
ddtdata.size = 4;
@ -799,6 +799,7 @@ void naomi_gdrom_board::device_start()
naomi_board::device_start();
dimm_data = nullptr;
dimm_des_data = nullptr;
dimm_data_size = 0;
char name[128];
@ -808,6 +809,15 @@ void naomi_gdrom_board::device_start()
uint8_t netpic = 0;
logerror("Work mode is %d\n", work_mode);
if (work_mode != 0)
{
dimm_command = 0;
dimm_offsetl = 0;
dimm_parameterl = 0;
dimm_parameterh = 0;
}
if(picdata) {
if(picdata.length() >= 0x4000) {
printf("Real PIC binary found\n");
@ -903,22 +913,26 @@ void naomi_gdrom_board::device_start()
uint32_t file_rounded_size = (file_size + 2047) & -2048;
for (dimm_data_size = 4096; dimm_data_size < file_rounded_size; dimm_data_size <<= 1);
dimm_data = auto_alloc_array(machine(), uint8_t, dimm_data_size);
if (work_mode == 0)
dimm_des_data = dimm_data;
else
dimm_des_data = auto_alloc_array(machine(), uint8_t, dimm_data_size);
if (dimm_data_size != file_rounded_size)
memset(dimm_data + file_rounded_size, 0, dimm_data_size - file_rounded_size);
// read encrypted data into dimm_data
// read encrypted data into dimm_des_data
uint32_t sectors = file_rounded_size / 2048;
for (uint32_t sec = 0; sec != sectors; sec++)
cdrom_read_data(gdromfile, file_start + sec, dimm_data + 2048 * sec, CD_TRACK_MODE1);
cdrom_read_data(gdromfile, file_start + sec, dimm_des_data + 2048 * sec, CD_TRACK_MODE1);
uint32_t des_subkeys[32];
des_generate_subkeys(rev64(key), des_subkeys);
// decrypt read data from dimm_des_data to dimm_data
for (int i = 0; i < file_rounded_size; i += 8)
write_from_qword(dimm_data + i, rev64(des_encrypt_decrypt(true, rev64(read_to_qword(dimm_data + i)), des_subkeys)));
write_from_qword(dimm_data + i, rev64(des_encrypt_decrypt(true, rev64(read_to_qword(dimm_des_data + i)), des_subkeys)));
}
// decrypt loaded data
cdrom_close(gdromfile);
if(!dimm_data)
@ -992,8 +1006,11 @@ void naomi_gdrom_board::device_add_mconfig(machine_config &config)
m_i2c1->set_e0(1);
m_i2c1->set_wc(1);
EEPROM_93C46_8BIT(config, m_eeprom, 0);
m_maincpu->set_disable();
m_securitycpu->set_disable();
if (work_mode == 0)
{
m_maincpu->set_disable();
m_securitycpu->set_disable();
}
}
// DIMM firmwares:

2
src/mame/machine/naomigd.h
View File

@ -93,6 +93,7 @@ protected:
private:
enum { FILENAME_LENGTH=24 };
const int work_mode = 0; // set to 1 and rebuild to enable the cpus
required_device<sh4_device> m_maincpu;
required_device<pic16c622_device> m_securitycpu;
@ -118,6 +119,7 @@ private:
uint32_t memctl_regs[0x100 / 4];
// Note: voluntarily not saved into the state
uint8_t *dimm_des_data;
uint8_t *dimm_data;
uint32_t dimm_data_size;