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Diffstat (limited to 'src/mess/video/galaxy.c')
-rw-r--r-- | src/mess/video/galaxy.c | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/src/mess/video/galaxy.c b/src/mess/video/galaxy.c deleted file mode 100644 index 0f8184916f8..00000000000 --- a/src/mess/video/galaxy.c +++ /dev/null @@ -1,134 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Krzysztof Strzecha, Miodrag Milanovic -/*************************************************************************** - - galaxy.c - - Functions to emulate the video hardware of the Galaksija. - - 20/05/2008 - Real video implementation by Miodrag Milanovic - 01/03/2008 - Update by Miodrag Milanovic to make Galaksija video work with new SVN code -***************************************************************************/ - -#include "emu.h" -#include "includes/galaxy.h" -#include "cpu/z80/z80.h" - - -TIMER_CALLBACK_MEMBER(galaxy_state::gal_video) -{ - address_space &space = m_maincpu->space(AS_PROGRAM); - int y, x; - if (m_interrupts_enabled == TRUE) - { - UINT8 *gfx = m_region_gfx1->base(); - UINT8 dat = (m_latch_value & 0x3c) >> 2; - if ((m_gal_cnt >= 48 * 2) && (m_gal_cnt < 48 * 210)) // display on screen just m_first 208 lines - { - UINT8 mode = (m_latch_value >> 1) & 1; // bit 2 latch represents mode - UINT16 addr = (m_maincpu->state_int(Z80_I) << 8) | m_maincpu->state_int(Z80_R) | ((m_latch_value & 0x80) ^ 0x80); - if (mode == 0) - { - // Text mode - if (m_first == 0 && (m_maincpu->state_int(Z80_R) & 0x1f) == 0) - { - // Due to a fact that on real processor latch value is set at - // the end of last cycle we need to skip dusplay of double - // m_first char in each row - m_code = 0x00; - m_first = 1; - } - else - { - m_code = space.read_byte(addr) & 0xbf; - m_code += (m_code & 0x80) >> 1; - m_code = gfx[(m_code & 0x7f) +(dat << 7 )] ^ 0xff; - m_first = 0; - } - y = m_gal_cnt / 48 - 2; - x = (m_gal_cnt % 48) * 8; - - m_bitmap.pix16(y, x ) = (m_code >> 0) & 1; x++; - m_bitmap.pix16(y, x ) = (m_code >> 1) & 1; x++; - m_bitmap.pix16(y, x ) = (m_code >> 2) & 1; x++; - m_bitmap.pix16(y, x ) = (m_code >> 3) & 1; x++; - m_bitmap.pix16(y, x ) = (m_code >> 4) & 1; x++; - m_bitmap.pix16(y, x ) = (m_code >> 5) & 1; x++; - m_bitmap.pix16(y, x ) = (m_code >> 6) & 1; x++; - m_bitmap.pix16(y, x ) = (m_code >> 7) & 1; - } - else - { // Graphics mode - if (m_first < 4 && (m_maincpu->state_int(Z80_R) & 0x1f) == 0) - { - // Due to a fact that on real processor latch value is set at - // the end of last cycle we need to skip dusplay of 4 times - // m_first char in each row - m_code = 0x00; - m_first++; - } - else - { - m_code = space.read_byte(addr) ^ 0xff; - m_first = 0; - } - y = m_gal_cnt / 48 - 2; - x = (m_gal_cnt % 48) * 8; - - /* hack - until calc of R is fixed in Z80 */ - if (x == 11 * 8 && y == 0) - { - m_start_addr = addr; - } - if ((x / 8 >= 11) && (x / 8 < 44)) - { - m_code = space.read_byte(m_start_addr + y * 32 + (m_gal_cnt % 48) - 11) ^ 0xff; - } - else - { - m_code = 0x00; - } - /* end of hack */ - - m_bitmap.pix16(y, x ) = (m_code >> 0) & 1; x++; - m_bitmap.pix16(y, x ) = (m_code >> 1) & 1; x++; - m_bitmap.pix16(y, x ) = (m_code >> 2) & 1; x++; - m_bitmap.pix16(y, x ) = (m_code >> 3) & 1; x++; - m_bitmap.pix16(y, x ) = (m_code >> 4) & 1; x++; - m_bitmap.pix16(y, x ) = (m_code >> 5) & 1; x++; - m_bitmap.pix16(y, x ) = (m_code >> 6) & 1; x++; - m_bitmap.pix16(y, x ) = (m_code >> 7) & 1; - } - } - m_gal_cnt++; - } -} - -void galaxy_state::galaxy_set_timer() -{ - m_gal_cnt = 0; - m_gal_video_timer->adjust(attotime::zero, 0, attotime::from_hz(6144000 / 8)); -} - -void galaxy_state::video_start() -{ - m_gal_cnt = 0; - - m_gal_video_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(galaxy_state::gal_video),this)); - m_gal_video_timer->adjust(attotime::zero, 0, attotime::never); - - machine().first_screen()->register_screen_bitmap(m_bitmap); -} - -UINT32 galaxy_state::screen_update_galaxy(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) -{ - m_gal_video_timer->adjust(attotime::zero, 0, attotime::never); - if (m_interrupts_enabled == FALSE) - { - const rectangle black_area(0, 384 - 1, 0, 208 - 1); - m_bitmap.fill(0, black_area); - } - m_interrupts_enabled = FALSE; - copybitmap(bitmap, m_bitmap, 0, 0, 0, 0, cliprect); - return 0; -} |