diff options
Diffstat (limited to 'src/mame/machine/samcoupe.cpp')
-rw-r--r-- | src/mame/machine/samcoupe.cpp | 334 |
1 files changed, 0 insertions, 334 deletions
diff --git a/src/mame/machine/samcoupe.cpp b/src/mame/machine/samcoupe.cpp deleted file mode 100644 index fee115b6e3d..00000000000 --- a/src/mame/machine/samcoupe.cpp +++ /dev/null @@ -1,334 +0,0 @@ -// license:GPL-2.0+ -// copyright-holders:Lee Hammerton, Dirk Best -/*************************************************************************** - - Miles Gordon Technology SAM Coupe - -***************************************************************************/ - -#include "emu.h" -#include "includes/samcoupe.h" - -/*************************************************************************** - CONSTANTS -***************************************************************************/ - -#define LMPR_RAM0 0x20 /* If bit set ram is paged into bank 0, else its rom0 */ -#define LMPR_ROM1 0x40 /* If bit set rom1 is paged into bank 3, else its ram */ -#define HMPR_MCNTRL 0x80 /* If set external RAM is enabled */ - - -/*************************************************************************** - MEMORY BANKING -***************************************************************************/ - -uint8_t samcoupe_state::sam_bank1_r(offs_t offset) -{ - if (sam_bank_read_ptr[0]) - return sam_bank_read_ptr[0][offset]; - - return 0xff; -} - -void samcoupe_state::sam_bank1_w(offs_t offset, uint8_t data) -{ - if (sam_bank_write_ptr[0]) - sam_bank_write_ptr[0][offset] = data; -} - - -uint8_t samcoupe_state::sam_bank2_r(offs_t offset) -{ - if (sam_bank_read_ptr[1]) - return sam_bank_read_ptr[1][offset]; - - return 0xff; -} - -void samcoupe_state::sam_bank2_w(offs_t offset, uint8_t data) -{ - if (sam_bank_write_ptr[1]) - sam_bank_write_ptr[1][offset] = data; -} - - -uint8_t samcoupe_state::sam_bank3_r(offs_t offset) -{ - if (sam_bank_read_ptr[2]) - return sam_bank_read_ptr[2][offset]; - - return 0xff; -} - -void samcoupe_state::sam_bank3_w(offs_t offset, uint8_t data) -{ - if (sam_bank_write_ptr[2]) - sam_bank_write_ptr[2][offset] = data; -} - - -uint8_t samcoupe_state::sam_bank4_r(offs_t offset) -{ - if (sam_bank_read_ptr[3]) - return sam_bank_read_ptr[3][offset]; - - return 0xff; -} - -void samcoupe_state::sam_bank4_w(offs_t offset, uint8_t data) -{ - if (sam_bank_write_ptr[3]) - sam_bank_write_ptr[3][offset] = data; -} - -void samcoupe_state::samcoupe_update_bank(address_space &space, int bank_num, uint8_t *memory, int is_readonly) -{ - sam_bank_read_ptr[bank_num-1] = memory; - if (!is_readonly) - sam_bank_write_ptr[bank_num-1] = memory; - else - sam_bank_write_ptr[bank_num-1] = nullptr; - - // installing banks on the fly is too slow (20% speed in Manic Miner gameplay vs 300% speed) -#if 0 - char bank[10]; - sprintf(bank,"bank%d",bank_num); - if (memory) - { - membank(bank)->set_base(memory); - space.install_read_bank (((bank_num-1) * 0x4000), ((bank_num-1) * 0x4000) + 0x3FFF, bank); - if (is_readonly) { - space.unmap_write(((bank_num-1) * 0x4000), ((bank_num-1) * 0x4000) + 0x3FFF); - } else { - space.install_write_bank(((bank_num-1) * 0x4000), ((bank_num-1) * 0x4000) + 0x3FFF, bank); - } - } else { - space.nop_readwrite(((bank_num-1) * 0x4000), ((bank_num-1) * 0x4000) + 0x3FFF); - } -#endif -} - - -void samcoupe_state::samcoupe_install_ext_mem(address_space &space) -{ - uint8_t *mem; - - /* bank 3 */ - if (m_lext >> 6 < m_ram->size() >> 20) - mem = &m_ram->pointer()[(m_ram->size() & 0xfffff) + (m_lext >> 6) * 0x100000 + (m_lext & 0x3f) * 0x4000]; - else - mem = nullptr; - - samcoupe_update_bank(space, 3, mem, false); - - /* bank 4 */ - if (m_hext >> 6 < m_ram->size() >> 20) - mem = &m_ram->pointer()[(m_ram->size() & 0xfffff) + (m_hext >> 6) * 0x100000 + (m_hext & 0x3f) * 0x4000]; - else - mem = nullptr; - - samcoupe_update_bank(space, 4, mem, false); -} - - -void samcoupe_state::samcoupe_update_memory(address_space &space) -{ - const int page_mask = ((m_ram->size() & 0xfffff) / 0x4000) - 1; - uint8_t *rom = m_region_maincpu->base(); - uint8_t *memory; - int is_readonly; - - /* BANK1 */ - if (m_lmpr & LMPR_RAM0) /* Is ram paged in at bank 1 */ - { - if ((m_lmpr & 0x1F) <= page_mask) - memory = &m_ram->pointer()[(m_lmpr & page_mask) * 0x4000]; - else - memory = nullptr; /* Attempt to page in non existent ram region */ - is_readonly = false; - } - else - { - memory = rom; /* Rom0 paged in */ - is_readonly = true; - } - samcoupe_update_bank(space, 1, memory, is_readonly); - - - /* BANK2 */ - if (((m_lmpr + 1) & 0x1f) <= page_mask) - memory = &m_ram->pointer()[((m_lmpr + 1) & page_mask) * 0x4000]; - else - memory = nullptr; /* Attempt to page in non existent ram region */ - samcoupe_update_bank(space, 2, memory, false); - - /* only update bank 3 and 4 when external memory is not enabled */ - if (m_hmpr & HMPR_MCNTRL) - { - samcoupe_install_ext_mem(space); - } - else - { - /* BANK3 */ - if ((m_hmpr & 0x1F) <= page_mask ) - memory = &m_ram->pointer()[(m_hmpr & page_mask)*0x4000]; - else - memory = nullptr; /* Attempt to page in non existent ram region */ - samcoupe_update_bank(space, 3, memory, false); - - - /* BANK4 */ - if (m_lmpr & LMPR_ROM1) /* Is Rom1 paged in at bank 4 */ - { - memory = rom + 0x4000; - is_readonly = true; - } - else - { - if (((m_hmpr + 1) & 0x1f) <= page_mask) - memory = &m_ram->pointer()[((m_hmpr + 1) & page_mask) * 0x4000]; - else - memory = nullptr; /* Attempt to page in non existent ram region */ - is_readonly = false; - } - samcoupe_update_bank(space, 4, memory, false); - } - - /* video memory location */ - if (m_vmpr & 0x40) /* if bit set in 2 bank screen mode */ - m_videoram = &m_ram->pointer()[((m_vmpr & 0x1e) & page_mask) * 0x4000]; - else - m_videoram = &m_ram->pointer()[((m_vmpr & 0x1f) & page_mask) * 0x4000]; -} - - -void samcoupe_state::samcoupe_ext_mem_w(offs_t offset, uint8_t data) -{ - address_space &space_program = m_maincpu->space(AS_PROGRAM); - - if (offset & 1) - m_hext = data; - else - m_lext = data; - - /* external RAM enabled? */ - if (m_hmpr & HMPR_MCNTRL) - { - samcoupe_install_ext_mem(space_program); - } -} - - -/*************************************************************************** - REAL TIME CLOCK -***************************************************************************/ - -uint8_t samcoupe_state::samcoupe_rtc_r(offs_t offset) -{ - return m_rtc->read(offset >> 12); -} - - -void samcoupe_state::samcoupe_rtc_w(offs_t offset, uint8_t data) -{ - m_rtc->write(offset >> 12, data); -} - - -/*************************************************************************** - MOUSE -***************************************************************************/ - -TIMER_CALLBACK_MEMBER(samcoupe_state::samcoupe_mouse_reset) -{ - m_mouse_index = 0; -} - -uint8_t samcoupe_state::samcoupe_mouse_r() -{ - uint8_t result; - - /* on a read, reset the timer */ - m_mouse_reset->adjust(attotime::from_usec(50)); - - /* update when we are about to read the first real values */ - if (m_mouse_index == 2) - { - /* update values */ - int mouse_x = m_io_mouse_x->read(); - int mouse_y = m_io_mouse_y->read(); - - int mouse_dx = m_mouse_x - mouse_x; - int mouse_dy = m_mouse_y - mouse_y; - - m_mouse_x = mouse_x; - m_mouse_y = mouse_y; - - /* button state */ - m_mouse_data[2] = m_mouse_buttons->read(); - - /* y-axis */ - m_mouse_data[3] = (mouse_dy & 0xf00) >> 8; - m_mouse_data[4] = (mouse_dy & 0x0f0) >> 4; - m_mouse_data[5] = (mouse_dy & 0x00f) >> 0; - - /* x-axis */ - m_mouse_data[6] = (mouse_dx & 0xf00) >> 8; - m_mouse_data[7] = (mouse_dx & 0x0f0) >> 4; - m_mouse_data[8] = (mouse_dx & 0x00f) >> 0; - } - - /* get current value */ - result = m_mouse_data[m_mouse_index++]; - - /* reset if we are at the end */ - if (m_mouse_index == sizeof(m_mouse_data)) - m_mouse_index = 1; - - return result; -} - -void samcoupe_state::machine_start() -{ - m_mouse_reset = timer_alloc(TIMER_MOUSE_RESET); - - /* schedule our video updates */ - m_video_update_timer = timer_alloc(TIMER_VIDEO_UPDATE); - m_video_update_timer->adjust(m_screen->time_until_pos(0, 0)); -} - -/*************************************************************************** - RESET -***************************************************************************/ - -void samcoupe_state::machine_reset() -{ - address_space &space = m_maincpu->space(AS_PROGRAM); - address_space &spaceio = m_maincpu->space(AS_IO); - - /* initialize state */ - m_lmpr = 0x0f; /* ROM0 paged in, ROM1 paged out RAM Banks */ - m_hmpr = 0x01; - m_vmpr = 0x81; - m_line_int = 0xff; /* line interrupts disabled */ - m_status = 0x1f; /* no interrupts active */ - - /* initialize mouse */ - m_mouse_index = 0; - m_mouse_data[0] = 0xff; - m_mouse_data[1] = 0xff; - - if (m_config->read() & 0x01) - { - /* install RTC */ - spaceio.install_readwrite_handler(0xef, 0xef, 0, 0, 0xff00, read8sm_delegate(*this, FUNC(samcoupe_state::samcoupe_rtc_r)), write8sm_delegate(*this, FUNC(samcoupe_state::samcoupe_rtc_w))); - } - else - { - /* no RTC support */ - spaceio.unmap_readwrite(0xef, 0xef, 0xff00); - } - - /* initialize memory */ - samcoupe_update_memory(space); -} |