/********************************************************************** Intel 82720 Graphics Display Controller emulation Copyright MESS Team. Visit http://mamedev.org for licensing and usage restrictions. **********************************************************************/ /* TODO: - implement FIFO as ring buffer - commands - DMAR - DMAW - incomplete / unimplemented FIGD / GCHRD draw modes - Arc - FIGD character - slanted character - GCHRD character (needs rewrite) - read-modify-write cycle - read data - modify data - write data - QX-10 diagnostic test has positioning bugs with the bitmap display test; - QX-10 diagnostic test misses the zooming factor (external pin); - compis2 SAD address for bitmap is 0x20000 for whatever reason (presumably missing banking); - A5105 has a FIFO bug with the RDAT, should be a lot larger when it scrolls up; - honor visible area - wide mode (32-bit access) - light pen */ #include "emu.h" #include "upd7220.h" //************************************************************************** // MACROS / CONSTANTS //************************************************************************** #define LOG 1 // todo typedef enum { COMMAND_INVALID = -1, COMMAND_RESET, COMMAND_SYNC, COMMAND_VSYNC, COMMAND_CCHAR, COMMAND_START, COMMAND_BCTRL, COMMAND_ZOOM, COMMAND_CURS, COMMAND_PRAM, COMMAND_PITCH, COMMAND_WDAT, COMMAND_MASK, COMMAND_FIGS, COMMAND_FIGD, COMMAND_GCHRD, COMMAND_RDAT, COMMAND_CURD, COMMAND_LPRD, COMMAND_DMAR, COMMAND_DMAW, COMMAND_5A }; enum { FIFO_READ = 0, FIFO_WRITE }; enum { FIFO_EMPTY = -1, FIFO_PARAMETER, FIFO_COMMAND }; #define UPD7220_COMMAND_RESET 0x00 #define UPD7220_COMMAND_SYNC 0x0e // & 0xfe #define UPD7220_COMMAND_VSYNC 0x6e // & 0xfe #define UPD7220_COMMAND_CCHAR 0x4b #define UPD7220_COMMAND_START 0x6b #define UPD7220_COMMAND_BCTRL 0x0c // & 0xfe #define UPD7220_COMMAND_ZOOM 0x46 #define UPD7220_COMMAND_CURS 0x49 #define UPD7220_COMMAND_PRAM 0x70 // & 0xf0 #define UPD7220_COMMAND_PITCH 0x47 #define UPD7220_COMMAND_WDAT 0x20 // & 0xe4 #define UPD7220_COMMAND_MASK 0x4a #define UPD7220_COMMAND_FIGS 0x4c #define UPD7220_COMMAND_FIGD 0x6c #define UPD7220_COMMAND_GCHRD 0x68 #define UPD7220_COMMAND_RDAT 0xa0 // & 0xe4 #define UPD7220_COMMAND_CURD 0xe0 #define UPD7220_COMMAND_LPRD 0xc0 #define UPD7220_COMMAND_DMAR 0xa4 // & 0xe4 #define UPD7220_COMMAND_DMAW 0x24 // & 0xe4 #define UPD7220_COMMAND_5A 0x5a #define UPD7220_SR_DATA_READY 0x01 #define UPD7220_SR_FIFO_FULL 0x02 #define UPD7220_SR_FIFO_EMPTY 0x04 #define UPD7220_SR_DRAWING_IN_PROGRESS 0x08 #define UPD7220_SR_DMA_EXECUTE 0x10 #define UPD7220_SR_VSYNC_ACTIVE 0x20 #define UPD7220_SR_HBLANK_ACTIVE 0x40 #define UPD7220_SR_LIGHT_PEN_DETECT 0x80 #define UPD7220_MODE_S 0x01 #define UPD7220_MODE_REFRESH_RAM 0x04 #define UPD7220_MODE_I 0x08 #define UPD7220_MODE_DRAW_ON_RETRACE 0x10 #define UPD7220_MODE_DISPLAY_MASK 0x22 #define UPD7220_MODE_DISPLAY_MIXED 0x00 #define UPD7220_MODE_DISPLAY_GRAPHICS 0x02 #define UPD7220_MODE_DISPLAY_CHARACTER 0x20 #define UPD7220_MODE_DISPLAY_INVALID 0x22 static const int x_dir[8] = { 0, 1, 1, 1, 0,-1,-1,-1}; static const int y_dir[8] = { 1, 1, 0,-1,-1,-1, 0, 1}; static const int x_dir_dot[8] = { 1, 1, 0,-1,-1,-1, 0, 1}; static const int y_dir_dot[8] = { 0,-1,-1,-1, 0, 1, 1, 1}; //************************************************************************** // GLOBAL VARIABLES //************************************************************************** // devices const device_type UPD7220 = &device_creator; // default address map static ADDRESS_MAP_START( upd7220_vram, AS_0, 8, upd7220_device ) AM_RANGE(0x00000, 0x3ffff) AM_RAM ADDRESS_MAP_END // internal 128x14 control ROM ROM_START( upd7220 ) ROM_REGION( 0x100, "upd7220", 0 ) ROM_LOAD( "upd7220.bin", 0x000, 0x100, NO_DUMP ) ROM_END //------------------------------------------------- // memory_space_config - return a description of // any address spaces owned by this device //------------------------------------------------- const address_space_config *upd7220_device::memory_space_config(address_spacenum spacenum) const { return (spacenum == AS_0) ? &m_space_config : NULL; } //------------------------------------------------- // rom_region - device-specific ROM region //------------------------------------------------- const rom_entry *upd7220_device::device_rom_region() const { return ROM_NAME( upd7220 ); } //------------------------------------------------- // device_config_complete - perform any // operations now that the configuration is // complete //------------------------------------------------- void upd7220_device::device_config_complete() { // inherit a copy of the static data const upd7220_interface *intf = reinterpret_cast(static_config()); if (intf != NULL) *static_cast(this) = *intf; // or initialize to defaults if none provided else { memset(&m_out_drq_cb, 0, sizeof(m_out_drq_cb)); memset(&m_out_hsync_cb, 0, sizeof(m_out_hsync_cb)); memset(&m_out_vsync_cb, 0, sizeof(m_out_vsync_cb)); memset(&m_out_blank_cb, 0, sizeof(m_out_blank_cb)); } } //************************************************************************** // INLINE HELPERS //************************************************************************** //------------------------------------------------- // readbyte - read a byte at the given address //------------------------------------------------- inline UINT8 upd7220_device::readbyte(offs_t address) { return space()->read_byte(address); } //------------------------------------------------- // writebyte - write a byte at the given address //------------------------------------------------- inline void upd7220_device::writebyte(offs_t address, UINT8 data) { space()->write_byte(address, data); } //------------------------------------------------- // fifo_clear - //------------------------------------------------- inline void upd7220_device::fifo_clear() { for (int i = 0; i < 16; i++) { m_fifo[i] = 0; m_fifo_flag[i] = FIFO_EMPTY; } m_fifo_ptr = -1; m_sr &= ~UPD7220_SR_DATA_READY; m_sr |= UPD7220_SR_FIFO_EMPTY; m_sr &= ~UPD7220_SR_FIFO_FULL; } //------------------------------------------------- // fifo_param_count - //------------------------------------------------- inline int upd7220_device::fifo_param_count() { int i; for (i = 0; i < 16; i++) { if (m_fifo_flag[i] != FIFO_PARAMETER) break; } return i; } //------------------------------------------------- // fifo_set_direction - //------------------------------------------------- inline void upd7220_device::fifo_set_direction(int dir) { if (m_fifo_dir != dir) { fifo_clear(); } m_fifo_dir = dir; } //------------------------------------------------- // queue - //------------------------------------------------- inline void upd7220_device::queue(UINT8 data, int flag) { if (m_fifo_ptr < 15) { m_fifo_ptr++; m_fifo[m_fifo_ptr] = data; m_fifo_flag[m_fifo_ptr] = flag; if (m_fifo_ptr == 16) { m_sr |= UPD7220_SR_FIFO_FULL; } m_sr &= ~UPD7220_SR_FIFO_EMPTY; } else { // TODO what happen? somebody set us up the bomb printf("FIFO?\n"); } } //------------------------------------------------- // dequeue - //------------------------------------------------- inline void upd7220_device::dequeue(UINT8 *data, int *flag) { *data = m_fifo[0]; *flag = m_fifo_flag[0]; if (m_fifo_ptr > -1) { for (int i = 0; i < 15; i++) { m_fifo[i] = m_fifo[i + 1]; m_fifo_flag[i] = m_fifo_flag[i + 1]; } m_fifo[15] = 0; m_fifo_flag[15] = 0; m_fifo_ptr--; if (m_fifo_ptr == -1) { m_sr &= ~UPD7220_SR_DATA_READY; m_sr |= UPD7220_SR_FIFO_EMPTY; } } } //------------------------------------------------- // update_vsync_timer - //------------------------------------------------- inline void upd7220_device::update_vsync_timer(int state) { int next_y = state ? m_vs : 0; attotime duration = m_screen->time_until_pos(next_y, 0); m_vsync_timer->adjust(duration, !state); } //------------------------------------------------- // update_hsync_timer - //------------------------------------------------- inline void upd7220_device::update_hsync_timer(int state) { int y = m_screen->vpos(); int next_x = state ? m_hs : 0; int next_y = state ? y : ((y + 1) % m_al); attotime duration = m_screen->time_until_pos(next_y, next_x); m_hsync_timer->adjust(duration, !state); } //------------------------------------------------- // update_blank_timer - //------------------------------------------------- inline void upd7220_device::update_blank_timer(int state) { int y = m_screen->vpos(); int next_x = state ? (m_hs + m_hbp) : (m_hs + m_hbp + (m_aw << 3)); int next_y = state ? ((y + 1) % (m_vs + m_vbp + m_al + m_vfp - 1)) : y; attotime duration = m_screen->time_until_pos(next_y, next_x); m_hsync_timer->adjust(duration, !state); } //------------------------------------------------- // recompute_parameters - //------------------------------------------------- inline void upd7220_device::recompute_parameters() { int horiz_pix_total = (m_hs + m_hbp + m_aw + m_hfp) * 8; int vert_pix_total = m_vs + m_vbp + m_al + m_vfp; //printf("%d %d %d %d\n",m_hs,m_hbp,m_aw,m_hfp); //printf("%d %d\n",m_aw * 8,m_pitch * 8); if (horiz_pix_total == 0 || vert_pix_total == 0) //bail out if screen params aren't valid return; attoseconds_t refresh = HZ_TO_ATTOSECONDS(60); //HZ_TO_ATTOSECONDS(clock() * 8) * horiz_pix_total * vert_pix_total; rectangle visarea; visarea.min_x = 0; //(m_hs + m_hbp) * 8; visarea.min_y = 0; //m_vs + m_vbp; visarea.max_x = m_aw * 8 - 1;//horiz_pix_total - (m_hfp * 8) - 1; visarea.max_y = m_al - 1;//vert_pix_total - m_vfp - 1; if (LOG) { logerror("uPD7220 '%s' Screen: %u x %u @ %f Hz\n", tag(), horiz_pix_total, vert_pix_total, 1 / ATTOSECONDS_TO_DOUBLE(refresh)); logerror("uPD7220 '%s' Visible Area: (%u, %u) - (%u, %u)\n", tag(), visarea.min_x, visarea.min_y, visarea.max_x, visarea.max_y); } if (m_m) { m_screen->configure(horiz_pix_total, vert_pix_total, visarea, refresh); update_hsync_timer(0); update_vsync_timer(0); } else { m_hsync_timer->enable(0); m_vsync_timer->enable(0); } update_blank_timer(0); } //------------------------------------------------- // reset_figs_param - //------------------------------------------------- inline void upd7220_device::reset_figs_param() { m_figs.m_dc = 0x0000; m_figs.m_d = 0x0008; m_figs.m_d1 = 0x0008; m_figs.m_d2 = 0x0000; m_figs.m_dm = 0x0000; } //------------------------------------------------- // advance_ead - //------------------------------------------------- inline void upd7220_device::advance_ead() { #define EAD m_ead #define DAD m_dad #define P x_dir[m_figs.m_dir] + (y_dir[m_figs.m_dir] * m_pitch) #define MSB(value) (BIT(value, 15)) #define LSB(value) (BIT(value, 0)) #define LR(value) ((value << 1) | MSB(value)) #define RR(value) ((LSB(value) << 15) | (value >> 1)) switch (m_draw_mode & 0x07) { case 0: EAD += P; break; case 1: EAD += P; if (MSB(DAD)) EAD++; DAD = LR(DAD); break; case 2: if (MSB(DAD)) EAD++; DAD = LR(DAD); break; case 3: EAD -= P; if (MSB(DAD)) EAD++; DAD = LR(DAD); break; case 4: EAD -= P; break; case 5: EAD -= P; if (LSB(DAD)) EAD--; DAD = RR(DAD); break; case 6: if (LSB(DAD)) EAD--; DAD = RR(DAD); break; case 7: EAD += P; if (LSB(DAD)) EAD--; DAD = RR(DAD); break; } EAD &= 0x3ffff; } //------------------------------------------------- // read_vram - //------------------------------------------------- inline void upd7220_device::read_vram(UINT8 type, UINT8 mod) { if (type == 1) { logerror("uPD7220 invalid type 1 RDAT parameter\n"); return; } if (mod) logerror("uPD7220 RDAT used with mod = %02x?\n",mod); for (int i = 0; i < m_figs.m_dc; i++) { switch(type) { case 0: queue(readbyte(m_ead*2), 0); queue(readbyte(m_ead*2+1), 0); break; case 2: queue(readbyte(m_ead*2), 0); break; case 3: queue(readbyte(m_ead*2+1), 0); break; } advance_ead(); } } //------------------------------------------------- // write_vram - //------------------------------------------------- inline void upd7220_device::write_vram(UINT8 type, UINT8 mod) { UINT16 result; if (type == 1) { printf("uPD7220 invalid type 1 WDAT parameter\n"); return; } result = 0; switch(type) { case 0: result = (m_pr[1] & 0xff); result |= (m_pr[2] << 8); result &= m_mask; break; case 2: result = (m_pr[1] & 0xff); result &= (m_mask & 0xff); break; case 3: result = (m_pr[1] << 8); result &= (m_mask & 0xff00); break; } //if(result) { //printf("%04x %02x %02x %04x %02x %02x\n",readbyte(m_ead),m_pr[1],m_pr[2],m_mask,type,mod); //printf("%04x %02x %02x\n",m_ead,m_figs.m_dir,m_pitch); //printf("%04x %04x %02x %04x\n",m_ead,result,mod,m_figs.m_dc); } for(int i = 0; i < m_figs.m_dc + 1; i++) { switch(mod & 3) { case 0x00: //replace if(type == 0 || type == 2) writebyte(m_ead*2+0, result & 0xff); if(type == 0 || type == 3) writebyte(m_ead*2+1, result >> 8); break; case 0x01: //complement if(type == 0 || type == 2) writebyte(m_ead*2+0, readbyte(m_ead*2+0) ^ (result & 0xff)); if(type == 0 || type == 3) writebyte(m_ead*2+1, readbyte(m_ead*2+1) ^ (result >> 8)); break; case 0x02: //reset to zero if(type == 0 || type == 2) writebyte(m_ead*2+0, readbyte(m_ead*2+0) & ~(result & 0xff)); if(type == 0 || type == 3) writebyte(m_ead*2+1, readbyte(m_ead*2+1) & ~(result >> 8)); break; case 0x03: //set to one if(type == 0 || type == 2) writebyte(m_ead*2+0, readbyte(m_ead*2+0) | (result & 0xff)); if(type == 0 || type == 3) writebyte(m_ead*2+1, readbyte(m_ead*2+1) | (result >> 8)); break; } advance_ead(); } } //------------------------------------------------- // check_pattern - //------------------------------------------------- inline UINT16 upd7220_device::check_pattern(UINT16 pattern) { UINT16 res = 0; switch (m_bitmap_mod & 3) { case 0: res = pattern; break; //replace case 1: res = pattern; break; //complement case 2: res = 0; break; //reset to zero case 3: res |= 0xffff; break; //set to one } return res; } //------------------------------------------------- // get_text_partition - //------------------------------------------------- inline void upd7220_device::get_text_partition(int index, UINT32 *sad, UINT16 *len, int *im, int *wd) { *sad = ((m_ra[(index * 4) + 1] & 0x1f) << 8) | m_ra[(index * 4) + 0]; *len = ((m_ra[(index * 4) + 3] & 0x3f) << 4) | (m_ra[(index * 4) + 2] >> 4); *im = BIT(m_ra[(index * 4) + 3], 6); *wd = BIT(m_ra[(index * 4) + 3], 7); } //------------------------------------------------- // get_graphics_partition - //------------------------------------------------- inline void upd7220_device::get_graphics_partition(int index, UINT32 *sad, UINT16 *len, int *im, int *wd) { *sad = ((m_ra[(index * 4) + 2] & 0x03) << 16) | (m_ra[(index * 4) + 1] << 8) | m_ra[(index * 4) + 0]; *len = ((m_ra[(index * 4) + 3] & 0x3f) << 4) | (m_ra[(index * 4) + 2] >> 4); *im = BIT(m_ra[(index * 4) + 3], 6); *wd = BIT(m_ra[(index * 4) + 3], 7); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // upd7220_device - constructor //------------------------------------------------- upd7220_device::upd7220_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, UPD7220, "uPD7220", tag, owner, clock), device_memory_interface(mconfig, *this), m_mask(0), m_pitch(0), m_ead(0), m_dad(0), m_lad(0), m_ra_addr(0), m_sr(UPD7220_SR_FIFO_EMPTY), m_cr(0), m_param_ptr(0), m_fifo_ptr(-1), m_fifo_dir(0), m_mode(0), m_draw_mode(0), m_de(0), m_m(0), m_aw(0), m_al(0), m_vs(0), m_vfp(0), m_vbp(0), m_hs(0), m_hfp(0), m_hbp(0), m_dc(0), m_sc(0), m_br(0), m_ctop(0), m_cbot(0), m_lr(0), m_disp(0), m_gchr(0), m_bitmap_mod(0), m_space_config("videoram", ENDIANNESS_LITTLE, 8, 18, 0, NULL, *ADDRESS_MAP_NAME(upd7220_vram)) { m_shortname = "upd7220"; for (int i = 0; i < 16; i++) { m_fifo[i] = 0; m_fifo_flag[i] = FIFO_EMPTY; m_ra[i] = 0; } for (int i = 0; i < 17; i++) { m_pr[i] = 0; } m_figs.m_dir = 0; m_figs.m_figure_type = 0; m_figs.m_dc = 0; m_figs.m_d = 0; m_figs.m_d1 = 0; m_figs.m_d2 = 0; m_figs.m_dm = 0; } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void upd7220_device::device_start() { // allocate timers m_vsync_timer = timer_alloc(TIMER_VSYNC); m_hsync_timer = timer_alloc(TIMER_HSYNC); m_blank_timer = timer_alloc(TIMER_BLANK); // resolve callbacks m_out_drq_func.resolve(m_out_drq_cb, *this); m_out_hsync_func.resolve(m_out_hsync_cb, *this); m_out_vsync_func.resolve(m_out_vsync_cb, *this); m_out_blank_func.resolve(m_out_blank_cb, *this); // find screen m_screen = machine().device(m_screen_tag); if (m_screen == NULL) { m_screen = owner()->subdevice(m_screen_tag); } assert(m_screen); // register for state saving save_item(NAME(m_ra)); save_item(NAME(m_sr)); save_item(NAME(m_mode)); save_item(NAME(m_de)); save_item(NAME(m_aw)); save_item(NAME(m_al)); save_item(NAME(m_vs)); save_item(NAME(m_vfp)); save_item(NAME(m_vbp)); save_item(NAME(m_hs)); save_item(NAME(m_hfp)); save_item(NAME(m_hbp)); save_item(NAME(m_m)); save_item(NAME(m_dc)); save_item(NAME(m_sc)); save_item(NAME(m_br)); save_item(NAME(m_lr)); save_item(NAME(m_ctop)); save_item(NAME(m_cbot)); save_item(NAME(m_ead)); save_item(NAME(m_dad)); save_item(NAME(m_lad)); save_item(NAME(m_disp)); save_item(NAME(m_gchr)); save_item(NAME(m_mask)); save_item(NAME(m_pitch)); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void upd7220_device::device_reset() { m_out_drq_func(CLEAR_LINE); } //------------------------------------------------- // device_timer - handler timer events //------------------------------------------------- void upd7220_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) { switch (id) { case TIMER_HSYNC: if (param) { m_sr |= UPD7220_SR_HBLANK_ACTIVE; } else { m_sr &= ~UPD7220_SR_HBLANK_ACTIVE; } m_out_hsync_func(param); update_hsync_timer(param); break; case TIMER_VSYNC: if (param) { m_sr |= UPD7220_SR_VSYNC_ACTIVE; } else { m_sr &= ~UPD7220_SR_VSYNC_ACTIVE; } m_out_vsync_func(param); update_vsync_timer(param); break; case TIMER_BLANK: if (param) { m_sr |= UPD7220_SR_HBLANK_ACTIVE; } else { m_sr &= ~UPD7220_SR_HBLANK_ACTIVE; } m_out_blank_func(param); update_blank_timer(param); break; } } //------------------------------------------------- // draw_pixel - //------------------------------------------------- void upd7220_device::draw_pixel(int x, int y, UINT16 tile_data) { UINT32 addr = (y * m_pitch * 2 + (x >> 3)) & 0x3ffff; int dad = x & 0x7; UINT8 data = readbyte(addr); if((m_bitmap_mod & 3) == 1) { writebyte(addr, data ^ ((tile_data) & (0x80 >> (dad)))); } else { writebyte(addr, data & ~(0x80 >> (dad))); writebyte(addr, data | ((tile_data) & (0x80 >> (dad)))); } } //------------------------------------------------- // draw_line - //------------------------------------------------- void upd7220_device::draw_line(int x, int y) { int line_size,i; const int line_x_dir[8] = { 0, 1, 1, 0, 0,-1,-1, 0}; const int line_y_dir[8] = { 1, 0, 0,-1,-1, 0, 0, 1}; const int line_x_step[8] = { 1, 0, 0, 1,-1, 0, 0,-1 }; const int line_y_step[8] = { 0, 1,-1, 0, 0,-1, 1, 0 }; UINT16 line_pattern; int line_step = 0; UINT8 dot; line_size = m_figs.m_dc + 1; line_pattern = check_pattern((m_ra[8]) | (m_ra[9]<<8)); for(i = 0;i>= 1; dot = ((line_pattern >> (i & 0xf)) & 1) << 7; draw_pixel(x + (line_step*line_x_step[m_figs.m_dir]),y + (line_step*line_y_step[m_figs.m_dir]),dot >> ((x + line_step*line_x_step[m_figs.m_dir]) & 0x7)); x += line_x_dir[m_figs.m_dir]; y += line_y_dir[m_figs.m_dir]; } /* TODO: check me*/ x += (line_step*line_x_step[m_figs.m_dir]); y += (line_step*line_y_step[m_figs.m_dir]); m_ead = (x >> 4) + (y * m_pitch); m_dad = x & 0x0f; } //------------------------------------------------- // draw_rectangle - //------------------------------------------------- void upd7220_device::draw_rectangle(int x, int y) { int i; const int rect_x_dir[8] = { 0, 1, 0,-1, 1, 1,-1,-1 }; const int rect_y_dir[8] = { 1, 0,-1, 0, 1,-1,-1, 1 }; UINT8 rect_type,rect_dir; UINT16 line_pattern; UINT8 dot; logerror("uPD7220 rectangle check: %d %d %02x %08x\n",x,y,m_figs.m_dir,m_ead); line_pattern = check_pattern((m_ra[8]) | (m_ra[9]<<8)); rect_type = (m_figs.m_dir & 1) << 2; rect_dir = rect_type | (((m_figs.m_dir >> 1) + 0) & 3); for(i = 0;i < m_figs.m_d;i++) { dot = ((line_pattern >> ((i+m_dad) & 0xf)) & 1) << 7; draw_pixel(x,y,dot >> (x & 0x7)); x+=rect_x_dir[rect_dir]; y+=rect_y_dir[rect_dir]; } rect_dir = rect_type | (((m_figs.m_dir >> 1) + 1) & 3); for(i = 0;i < m_figs.m_d2;i++) { dot = ((line_pattern >> ((i+m_dad) & 0xf)) & 1) << 7; draw_pixel(x,y,dot >> (x & 0x7)); x+=rect_x_dir[rect_dir]; y+=rect_y_dir[rect_dir]; } rect_dir = rect_type | (((m_figs.m_dir >> 1) + 2) & 3); for(i = 0;i < m_figs.m_d;i++) { dot = ((line_pattern >> ((i+m_dad) & 0xf)) & 1) << 7; draw_pixel(x,y,dot >> (x & 0x7)); x+=rect_x_dir[rect_dir]; y+=rect_y_dir[rect_dir]; } rect_dir = rect_type | (((m_figs.m_dir >> 1) + 3) & 3); for(i = 0;i < m_figs.m_d2;i++) { dot = ((line_pattern >> ((i+m_dad) & 0xf)) & 1) << 7; draw_pixel(x,y,dot >> (x & 0x7)); x+=rect_x_dir[rect_dir]; y+=rect_y_dir[rect_dir]; } m_ead = (x >> 4) + (y * m_pitch); m_dad = x & 0x0f; } //------------------------------------------------- // draw_char - //------------------------------------------------- void upd7220_device::draw_char(int x, int y) { int xi,yi; int xsize,ysize; UINT8 tile_data; /* snippet for character checking */ #if 0 for(yi=0;yi<8;yi++) { for(xi=0;xi<8;xi++) { printf("%d",(m_ra[(yi & 7) | 8] >> xi) & 1); } printf("\n"); } #endif xsize = m_figs.m_d & 0x3ff; /* Guess: D has presumably upper bits for ysize, QX-10 relies on this (TODO: check this on any real HW) */ ysize = ((m_figs.m_d & 0x400) + m_figs.m_dc) + 1; /* TODO: internal direction, zooming, size stuff bigger than 8, rewrite using draw_pixel function */ for(yi=0;yi> 3); writebyte(addr & 0x3ffff, readbyte(addr & 0x3ffff) & ~(1 << (xi & 7))); writebyte(addr & 0x3ffff, readbyte(addr & 0x3ffff) | ((tile_data) & (1 << (xi & 7)))); } } m_ead = ((x+8*x_dir_dot[m_figs.m_dir]) >> 4) + ((y+8*y_dir_dot[m_figs.m_dir]) * m_pitch); m_dad = ((x+8*x_dir_dot[m_figs.m_dir]) & 0xf); } //------------------------------------------------- // translate_command - //------------------------------------------------- int upd7220_device::translate_command(UINT8 data) { int command = COMMAND_INVALID; switch (data) { case UPD7220_COMMAND_RESET: command = COMMAND_RESET; break; case UPD7220_COMMAND_CCHAR: command = COMMAND_CCHAR; break; case UPD7220_COMMAND_START: command = COMMAND_START; break; case UPD7220_COMMAND_ZOOM: command = COMMAND_ZOOM; break; case UPD7220_COMMAND_CURS: command = COMMAND_CURS; break; case UPD7220_COMMAND_PITCH: command = COMMAND_PITCH; break; case UPD7220_COMMAND_MASK: command = COMMAND_MASK; break; case UPD7220_COMMAND_FIGS: command = COMMAND_FIGS; break; case UPD7220_COMMAND_FIGD: command = COMMAND_FIGD; break; case UPD7220_COMMAND_GCHRD: command = COMMAND_GCHRD; break; case UPD7220_COMMAND_CURD: command = COMMAND_CURD; break; case UPD7220_COMMAND_LPRD: command = COMMAND_LPRD; break; case UPD7220_COMMAND_5A: command = COMMAND_5A; break; default: switch (data & 0xfe) { case UPD7220_COMMAND_SYNC: command = COMMAND_SYNC; break; case UPD7220_COMMAND_VSYNC: command = COMMAND_VSYNC; break; case UPD7220_COMMAND_BCTRL: command = COMMAND_BCTRL; break; default: switch (data & 0xf0) { case UPD7220_COMMAND_PRAM: command = COMMAND_PRAM; break; default: switch (data & 0xe4) { case UPD7220_COMMAND_WDAT: command = COMMAND_WDAT; break; case UPD7220_COMMAND_RDAT: command = COMMAND_RDAT; break; case UPD7220_COMMAND_DMAR: command = COMMAND_DMAR; break; case UPD7220_COMMAND_DMAW: command = COMMAND_DMAW; break; } } } } return command; } //------------------------------------------------- // process_fifo - //------------------------------------------------- void upd7220_device::process_fifo() { UINT8 data; int flag; dequeue(&data, &flag); if (flag == FIFO_COMMAND) { m_cr = data; m_param_ptr = 1; } else { m_pr[m_param_ptr] = data; m_param_ptr++; } switch (translate_command(m_cr)) { case COMMAND_INVALID: printf("uPD7220 '%s' Invalid Command Byte %02x\n", tag(), m_cr); break; case COMMAND_5A: if (m_param_ptr == 4) printf("uPD7220 '%s' Undocumented Command 0x5A Executed %02x %02x %02x\n", tag(),m_pr[1],m_pr[2],m_pr[3] ); break; case COMMAND_RESET: /* reset */ switch (m_param_ptr) { case 0: if (LOG) logerror("uPD7220 '%s' RESET\n", tag()); m_de = 0; m_ra[0] = m_ra[1] = m_ra[2] = 0; m_ra[3] = 0x19; m_ead = 0; m_dad = 0; m_mask = 0; break; case 9: m_mode = m_pr[1]; m_aw = m_pr[2] + 2; m_hs = (m_pr[3] & 0x1f) + 1; m_vs = ((m_pr[4] & 0x03) << 3) | (m_pr[3] >> 5); m_hfp = (m_pr[4] >> 2) + 1; m_hbp = (m_pr[5] & 0x3f) + 1; m_vfp = m_pr[6] & 0x3f; m_al = ((m_pr[8] & 0x03) << 8) | m_pr[7]; m_vbp = m_pr[8] >> 2; m_pitch = m_aw; if (LOG) { logerror("uPD7220 '%s' Mode: %02x\n", tag(), m_mode); logerror("uPD7220 '%s' AW: %u\n", tag(), m_aw); logerror("uPD7220 '%s' HS: %u\n", tag(), m_hs); logerror("uPD7220 '%s' VS: %u\n", tag(), m_vs); logerror("uPD7220 '%s' HFP: %u\n", tag(), m_hfp); logerror("uPD7220 '%s' HBP: %u\n", tag(), m_hbp); logerror("uPD7220 '%s' VFP: %u\n", tag(), m_vfp); logerror("uPD7220 '%s' AL: %u\n", tag(), m_al); logerror("uPD7220 '%s' VBP: %u\n", tag(), m_vbp); logerror("uPD7220 '%s' PITCH: %u\n", tag(), m_pitch); } recompute_parameters(); break; } break; case COMMAND_SYNC: /* sync format specify */ if (m_param_ptr == 9) { m_mode = m_pr[1]; m_aw = m_pr[2] + 2; m_hs = (m_pr[3] & 0x1f) + 1; m_vs = ((m_pr[4] & 0x03) << 3) | (m_pr[3] >> 5); m_hfp = (m_pr[4] >> 2) + 1; m_hbp = (m_pr[5] & 0x3f) + 1; m_vfp = m_pr[6] & 0x3f; m_al = ((m_pr[8] & 0x03) << 8) | m_pr[7]; m_vbp = m_pr[8] >> 2; m_pitch = m_aw; if (LOG) { logerror("uPD7220 '%s' Mode: %02x\n", tag(), m_mode); logerror("uPD7220 '%s' AW: %u\n", tag(), m_aw); logerror("uPD7220 '%s' HS: %u\n", tag(), m_hs); logerror("uPD7220 '%s' VS: %u\n", tag(), m_vs); logerror("uPD7220 '%s' HFP: %u\n", tag(), m_hfp); logerror("uPD7220 '%s' HBP: %u\n", tag(), m_hbp); logerror("uPD7220 '%s' VFP: %u\n", tag(), m_vfp); logerror("uPD7220 '%s' AL: %u\n", tag(), m_al); logerror("uPD7220 '%s' VBP: %u\n", tag(), m_vbp); logerror("uPD7220 '%s' PITCH: %u\n", tag(), m_pitch); } recompute_parameters(); } break; case COMMAND_VSYNC: /* vertical sync mode */ m_m = m_cr & 0x01; if (LOG) logerror("uPD7220 '%s' M: %u\n", tag(), m_m); recompute_parameters(); break; case COMMAND_CCHAR: /* cursor & character characteristics */ if(m_param_ptr == 2) { m_lr = (m_pr[1] & 0x1f) + 1; m_dc = BIT(m_pr[1], 7); if (LOG) { logerror("uPD7220 '%s' LR: %u\n", tag(), m_lr); logerror("uPD7220 '%s' DC: %u\n", tag(), m_dc); } } if(m_param_ptr == 3) { m_ctop = m_pr[2] & 0x1f; m_sc = BIT(m_pr[2], 5); if (LOG) { logerror("uPD7220 '%s' CTOP: %u\n", tag(), m_ctop); logerror("uPD7220 '%s' SC: %u\n", tag(), m_sc); } } if(m_param_ptr == 4) { m_br = ((m_pr[3] & 0x07) << 2) | (m_pr[2] >> 6); m_cbot = m_pr[3] >> 3; if (LOG) { logerror("uPD7220 '%s' BR: %u\n", tag(), m_br); logerror("uPD7220 '%s' CBOT: %u\n", tag(), m_cbot); } } break; case COMMAND_START: /* start display & end idle mode */ m_de = 1; if (LOG) logerror("uPD7220 '%s' DE: 1\n", tag()); break; case COMMAND_BCTRL: /* display blanking control */ m_de = m_cr & 0x01; if (LOG) logerror("uPD7220 '%s' DE: %u\n", tag(), m_de); break; case COMMAND_ZOOM: /* zoom factors specify */ if (flag == FIFO_PARAMETER) { m_gchr = m_pr[1] & 0x0f; m_disp = m_pr[1] >> 4; if (LOG) logerror("uPD7220 '%s' GCHR: %01x\n", tag(), m_gchr); if (LOG) logerror("uPD7220 '%s' DISP: %01x\n", tag(), m_disp); } break; case COMMAND_CURS: /* cursor position specify */ if (m_param_ptr >= 3) { UINT8 upper_addr = (m_param_ptr == 3) ? 0 : (m_pr[3] & 0x03); m_ead = (upper_addr << 16) | (m_pr[2] << 8) | m_pr[1]; if (LOG) logerror("uPD7220 '%s' EAD: %06x\n", tag(), m_ead); if(m_param_ptr == 4) { m_dad = m_pr[3] >> 4; if (LOG) logerror("uPD7220 '%s' DAD: %01x\n", tag(), m_dad); } } break; case COMMAND_PRAM: /* parameter RAM load */ if (flag == FIFO_COMMAND) { m_ra_addr = m_cr & 0x0f; } else { if (m_ra_addr < 16) { if (LOG) logerror("uPD7220 '%s' RA%u: %02x\n", tag(), m_ra_addr, data); m_ra[m_ra_addr] = data; m_ra_addr++; } m_param_ptr = 0; } break; case COMMAND_PITCH: /* pitch specification */ if (flag == FIFO_PARAMETER) { m_pitch = data; if (LOG) logerror("uPD7220 '%s' PITCH: %u\n", tag(), m_pitch); } break; case COMMAND_WDAT: /* write data into display memory */ m_bitmap_mod = m_cr & 3; if (m_param_ptr == 3 || (m_param_ptr == 2 && m_cr & 0x10)) { //printf("%02x = %02x %02x (%c) %04x\n",m_cr,m_pr[2],m_pr[1],m_pr[1],EAD); fifo_set_direction(FIFO_WRITE); write_vram((m_cr & 0x18) >> 3,m_cr & 3); reset_figs_param(); m_param_ptr = 1; } break; case COMMAND_MASK: /* mask register load */ if (m_param_ptr == 3) { m_mask = (m_pr[2] << 8) | m_pr[1]; if (LOG) logerror("uPD7220 '%s' MASK: %04x\n", tag(), m_mask); } break; case COMMAND_FIGS: /* figure drawing parameters specify */ if (m_param_ptr == 2) { m_figs.m_dir = m_pr[1] & 0x7; m_figs.m_figure_type = (m_pr[1] & 0xf8) >> 3; //if(m_figs.m_dir != 2) // printf("DIR %02x\n",m_pr[1]); } // the Decision Mate V during start-up test upload only 2 params before execute the // RDAT command, so I assume this is the expected behaviour, but this needs to be verified. if (m_param_ptr == 3) m_figs.m_dc = (m_pr[2]) | (m_figs.m_dc & 0x3f00); if (m_param_ptr == 4) m_figs.m_dc = (m_pr[2]) | ((m_pr[3] & 0x3f) << 8); if (m_param_ptr == 6) m_figs.m_d = (m_pr[4]) | ((m_pr[5] & 0x3f) << 8); if (m_param_ptr == 8) m_figs.m_d2 = (m_pr[6]) | ((m_pr[7] & 0x3f) << 8); if (m_param_ptr == 10) m_figs.m_d1 = (m_pr[8]) | ((m_pr[9] & 0x3f) << 8); if (m_param_ptr == 12) m_figs.m_dm = (m_pr[10]) | ((m_pr[11] & 0x3f) << 8); break; case COMMAND_FIGD: /* figure draw start */ if(m_figs.m_figure_type == 0) { UINT16 line_pattern = check_pattern((m_ra[8]) | (m_ra[9]<<8)); UINT8 dot = ((line_pattern >> (0 & 0xf)) & 1) << 7; draw_pixel(((m_ead % m_pitch) << 4) | (m_dad & 0xf),(m_ead / m_pitch),dot); } else if(m_figs.m_figure_type == 1) draw_line(((m_ead % m_pitch) << 4) | (m_dad & 0xf),(m_ead / m_pitch)); else if(m_figs.m_figure_type == 8) draw_rectangle(((m_ead % m_pitch) << 4) | (m_dad & 0xf),(m_ead / m_pitch)); else printf("uPD7220 '%s' Unimplemented command FIGD %02x\n", tag(),m_figs.m_figure_type); reset_figs_param(); m_sr |= UPD7220_SR_DRAWING_IN_PROGRESS; break; case COMMAND_GCHRD: /* graphics character draw and area filling start */ if(m_figs.m_figure_type == 2) draw_char(((m_ead % m_pitch) << 4) | (m_dad & 0xf),(m_ead / m_pitch)); else printf("uPD7220 '%s' Unimplemented command GCHRD %02x\n", tag(),m_figs.m_figure_type); reset_figs_param(); m_sr |= UPD7220_SR_DRAWING_IN_PROGRESS; break; case COMMAND_RDAT: /* read data from display memory */ fifo_set_direction(FIFO_READ); read_vram((m_cr & 0x18) >> 3,m_cr & 3); reset_figs_param(); m_sr |= UPD7220_SR_DATA_READY; break; case COMMAND_CURD: /* cursor address read */ fifo_set_direction(FIFO_READ); queue(m_ead & 0xff, 0); queue((m_ead >> 8) & 0xff, 0); queue(m_ead >> 16, 0); queue(m_dad & 0xff, 0); queue(m_dad >> 8, 0); m_sr |= UPD7220_SR_DATA_READY; break; case COMMAND_LPRD: /* light pen address read */ fifo_set_direction(FIFO_READ); queue(m_lad & 0xff, 0); queue((m_lad >> 8) & 0xff, 0); queue(m_lad >> 16, 0); m_sr |= UPD7220_SR_DATA_READY; m_sr &= ~UPD7220_SR_LIGHT_PEN_DETECT; break; case COMMAND_DMAR: /* DMA read request */ printf("uPD7220 '%s' Unimplemented command DMAR\n", tag()); break; case COMMAND_DMAW: /* DMA write request */ printf("uPD7220 '%s' Unimplemented command DMAW\n", tag()); break; } } //------------------------------------------------- // read - //------------------------------------------------- READ8_MEMBER( upd7220_device::read ) { UINT8 data; if (offset & 1) { /* FIFO read */ int flag; fifo_set_direction(FIFO_READ); dequeue(&data, &flag); } else { /* status register */ data = m_sr; /* TODO: timing of these */ m_sr &= ~UPD7220_SR_DRAWING_IN_PROGRESS; m_sr &= ~UPD7220_SR_DMA_EXECUTE; } return data; } //------------------------------------------------- // write - //------------------------------------------------- WRITE8_MEMBER( upd7220_device::write ) { if (offset & 1) { /* command into FIFO */ fifo_set_direction(FIFO_WRITE); queue(data, 1); } else { /* parameter into FIFO */ // fifo_set_direction(FIFO_WRITE); queue(data, 0); } process_fifo(); } //------------------------------------------------- // dack_r - //------------------------------------------------- READ8_MEMBER( upd7220_device::dack_r ) { return 0; } //------------------------------------------------- // dack_w - //------------------------------------------------- WRITE8_MEMBER( upd7220_device::dack_w ) { } //------------------------------------------------- // ext_sync_w - //------------------------------------------------- WRITE_LINE_MEMBER( upd7220_device::ext_sync_w ) { //if (LOG) logerror("uPD7220 '%s' External Synchronization: %u\n", tag(), state); if (state) { m_sr |= UPD7220_SR_VSYNC_ACTIVE; } else { m_sr &= ~UPD7220_SR_VSYNC_ACTIVE; } } //------------------------------------------------- // ext_sync_w - //------------------------------------------------- WRITE_LINE_MEMBER( upd7220_device::lpen_w ) { /* only if 2 rising edges on the lpen input occur at the same point during successive video fields are the pulses accepted */ /* 1. compute the address of the location on the CRT 2. compare with LAD 3. if not equal move address to LAD 4. if equal set LPEN DETECT flag to 1 */ } //------------------------------------------------- // update_text - //------------------------------------------------- void upd7220_device::update_text(bitmap_ind16 &bitmap, const rectangle &cliprect) { UINT32 addr, sad; UINT16 len; int im, wd; int y, sy = 0; for (int area = 0; area < 4; area++) { get_text_partition(area, &sad, &len, &im, &wd); for (y = sy; y < sy + len; y++) { addr = sad + (y * m_pitch); if (m_draw_text_cb) m_draw_text_cb(this, bitmap, addr, y, wd, m_pitch, 0, 0, m_aw * 8 - 1, m_al - 1, m_lr, m_dc, m_ead); } sy = y + 1; } } //------------------------------------------------- // draw_graphics_line - //------------------------------------------------- void upd7220_device::draw_graphics_line(bitmap_ind16 &bitmap, UINT32 addr, int y, int wd) { int sx; for (sx = 0; sx < m_pitch * 2; sx++) { if((sx << 3) < m_aw * 16 && y < m_al) m_display_cb(this, bitmap, y, sx << 3, addr); if (wd) addr += 2; else addr++; } } //------------------------------------------------- // update_graphics - //------------------------------------------------- void upd7220_device::update_graphics(bitmap_ind16 &bitmap, const rectangle &cliprect, int force_bitmap) { UINT32 addr, sad; UINT16 len; int im, wd, area; int y, tsy = 0, bsy = 0; for (area = 0; area < 2; area++) { get_graphics_partition(area, &sad, &len, &im, &wd); for (y = 0; y < len; y++) { if (im || force_bitmap) { addr = (sad & 0x3ffff) + (y * m_pitch * 2); if (m_display_cb) draw_graphics_line(bitmap, addr, y + bsy, wd); } else { /* TODO: text params are more limited compared to graphics */ addr = (sad & 0x3ffff) + (y * m_pitch); if (m_draw_text_cb) m_draw_text_cb(this, bitmap, addr, y + tsy, wd, m_pitch, 0, 0, m_aw * 8 - 1, len + bsy - 1, m_lr, m_dc, m_ead); } } if (m_lr) tsy += (y / m_lr); bsy += y; } } //------------------------------------------------- // update_screen - //------------------------------------------------- UINT32 upd7220_device::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { if (m_de) { switch (m_mode & UPD7220_MODE_DISPLAY_MASK) { case UPD7220_MODE_DISPLAY_MIXED: update_graphics(bitmap, cliprect, 0); break; case UPD7220_MODE_DISPLAY_GRAPHICS: update_graphics(bitmap, cliprect, 1); break; case UPD7220_MODE_DISPLAY_CHARACTER: update_text(bitmap, cliprect); break; case UPD7220_MODE_DISPLAY_INVALID: logerror("uPD7220 '%s' Invalid Display Mode!\n", tag()); } } return 0; }