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amstrad: allow for loading CPR cartridges with odd numbers of blocks

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This commit is contained in:
mahlemiut 2018-04-30 15:12:08 +12:00
parent bbf7833bf5
commit d1b4dae0e1
1 changed files with 2 additions and 2 deletions
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4
src/mame/machine/amstrad.cpp
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@ -2936,7 +2936,7 @@ void amstrad_state::enumerate_roms()
if (m_system_type == SYSTEM_PLUS || m_system_type == SYSTEM_GX4000) if (m_system_type == SYSTEM_PLUS || m_system_type == SYSTEM_GX4000)
{ {
uint8_t *crt = m_region_cart->base(); uint8_t *crt = m_region_cart->base();
int bank_mask = (m_cart->get_rom_size() / 0x4000) - 1; int bank_num = (m_cart->get_rom_size() / 0x4000);
/* ROMs are stored on the inserted cartridge in the Plus/GX4000 */ /* ROMs are stored on the inserted cartridge in the Plus/GX4000 */
for (int i = 0; i < 128; i++) // fill ROM table for (int i = 0; i < 128; i++) // fill ROM table
@ -2946,7 +2946,7 @@ void amstrad_state::enumerate_roms()
for(int i = 128; i < 160; i++) for(int i = 128; i < 160; i++)
{ {
m_Amstrad_ROM_Table[i] = &crt[((i - 128) & bank_mask) * 0x4000]; m_Amstrad_ROM_Table[i] = &crt[((i - 128) % bank_num) * 0x4000];
} }
m_Amstrad_ROM_Table[7] = &crt[0xc000]; m_Amstrad_ROM_Table[7] = &crt[0xc000];
slot7 = true; slot7 = true;