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ef9340_1: add pinout reference
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@ -6,7 +6,7 @@ Thomson EF9340 + EF9341 teletext graphics, this device is a combination of chips
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Minimal components:
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- Thomson EF9340 "VIN"
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- Thomson EF9341 "GEN"
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- Thomson EF9341 "GEN" (CPU connects to this one)
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- 2*1KB RAM, A for attributes, B for character codes
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There's also an optional extended character memory, it can be RAM or ROM.
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@ -18,6 +18,7 @@ TODO:
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- internal display timing (on g7400, most of it is done externally)
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- window boxing
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- Y zoom
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- RES(restart) pin
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***************************************************************************/
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@ -61,7 +62,7 @@ void ef9340_1_device::device_start()
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m_write_exram.resolve_safe();
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m_read_exram.resolve_safe(0xff);
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// Let the screen create our temporary bitmap with the screen's dimensions
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// let the screen create our temporary bitmap with the screen's dimensions
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screen().register_screen_bitmap(m_tmp_bitmap);
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m_line_timer = timer_alloc(TIMER_LINE);
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@ -169,30 +170,30 @@ void ef9340_1_device::ef9341_write(u8 command, u8 b, u8 data)
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m_ef9341.busy = true;
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switch (m_ef9341.TB & 0xe0)
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{
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case 0x00: /* Begin row */
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m_ef9340.X = 0;
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m_ef9340.Y = m_ef9341.TA & 0x1f;
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break;
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case 0x20: /* Load Y */
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m_ef9340.Y = m_ef9341.TA & 0x1f;
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break;
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case 0x40: /* Load X */
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m_ef9340.X = m_ef9341.TA & 0x3f;
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break;
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case 0x60: /* INC C */
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ef9340_inc_c();
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break;
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case 0x80: /* Load M */
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m_ef9340.M = m_ef9341.TA;
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break;
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case 0xa0: /* Load R */
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m_ef9340.R = m_ef9341.TA;
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break;
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case 0xc0: /* Load Y0 */
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m_ef9340.Y0 = m_ef9341.TA & 0x3f;
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break;
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case 0xe0: /* Not interpreted */
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break;
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case 0x00: // begin row
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m_ef9340.X = 0;
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m_ef9340.Y = m_ef9341.TA & 0x1f;
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break;
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case 0x20: // load Y
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m_ef9340.Y = m_ef9341.TA & 0x1f;
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break;
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case 0x40: // load X
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m_ef9340.X = m_ef9341.TA & 0x3f;
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break;
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case 0x60: // increment C
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ef9340_inc_c();
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break;
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case 0x80: // load M
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m_ef9340.M = m_ef9341.TA;
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break;
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case 0xa0: // load R
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m_ef9340.R = m_ef9341.TA;
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break;
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case 0xc0: // load Y0
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m_ef9340.Y0 = m_ef9341.TA & 0x3f;
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break;
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case 0xe0: // not interpreted
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break;
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}
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m_ef9341.busy = false;
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}
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@ -211,32 +212,32 @@ void ef9340_1_device::ef9341_write(u8 command, u8 b, u8 data)
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m_ef9341.busy = true;
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switch (m_ef9340.M & 0xe0)
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{
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case 0x00: /* Write */
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case 0x00: // write
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m_ram_a[addr] = m_ef9341.TA;
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m_ram_b[addr] = m_ef9341.TB;
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ef9340_inc_c();
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break;
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case 0x40: /* Write without increment */
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case 0x40: // write without increment
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m_ram_a[addr] = m_ef9341.TA;
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m_ram_b[addr] = m_ef9341.TB;
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break;
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case 0x80: /* Write slice */
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{
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u8 a = m_ram_a[addr];
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u8 b = m_ram_b[addr];
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u8 slice = m_ef9340.M & 0x0f;
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case 0x80: // write slice
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{
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u8 a = m_ram_a[addr];
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u8 b = m_ram_b[addr];
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u8 slice = m_ef9340.M & 0x0f;
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if (b >= 0xa0)
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m_write_exram(a << 12 | b << 4 | slice, m_ef9341.TA);
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if (b >= 0xa0)
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m_write_exram(a << 12 | b << 4 | slice, m_ef9341.TA);
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// Increment slice number
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m_ef9340.M = (m_ef9340.M & 0xf0) | ((slice + 1) % 10);
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}
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// increment slice number
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m_ef9340.M = (m_ef9340.M & 0xf0) | ((slice + 1) % 10);
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break;
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}
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default: /* Illegal or Read command */
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default: // illegal or read command
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break;
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}
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m_ef9341.busy = false;
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@ -276,37 +277,37 @@ u8 ef9340_1_device::ef9341_read(u8 command, u8 b)
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m_ef9341.busy = true;
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switch (m_ef9340.M & 0xe0)
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{
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case 0x20: /* Read */
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case 0x20: // read
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m_ef9341.TA = m_ram_a[addr];
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m_ef9341.TB = m_ram_b[addr];
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ef9340_inc_c();
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break;
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case 0x60: /* Read without increment */
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case 0x60: // read without increment
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m_ef9341.TA = m_ram_a[addr];
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m_ef9341.TB = m_ram_b[addr];
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break;
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case 0xa0: /* Read slice */
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{
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u8 a = m_ram_a[addr];
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u8 b = m_ram_b[addr];
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u8 slice = m_ef9340.M & 0x0f;
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case 0xa0: // read slice
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{
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u8 a = m_ram_a[addr];
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u8 b = m_ram_b[addr];
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u8 slice = m_ef9340.M & 0x0f;
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m_ef9341.TA = 0xff;
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m_ef9341.TB = 0xff;
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m_ef9341.TA = 0xff;
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m_ef9341.TB = 0xff;
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if (b >= 0xa0)
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m_ef9341.TA = m_read_exram(a << 12 | b << 4 | slice);
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else if (b < 0x80 && slice < 10)
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m_ef9341.TA = m_charset[(((a & 0x80) | (b & 0x7f)) * 10) + slice];
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if (b >= 0xa0)
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m_ef9341.TA = m_read_exram(a << 12 | b << 4 | slice);
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else if (b < 0x80 && slice < 10)
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m_ef9341.TA = m_charset[(((a & 0x80) | (b & 0x7f)) * 10) + slice];
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// Increment slice number
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m_ef9340.M = (m_ef9340.M & 0xf0) | ((slice + 1) % 10);
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}
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// increment slice number
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m_ef9340.M = (m_ef9340.M & 0xf0) | ((slice + 1) % 10);
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break;
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}
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default: /* Illegal or Write command */
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default: // illegal or write command
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break;
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}
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m_ef9341.busy = false;
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@ -346,15 +347,15 @@ void ef9340_1_device::ef9340_scanline(int vpos)
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if (vpos < 10)
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{
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// Service row
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// service row
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if (m_ef9340.R & 0x08)
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{
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// Service row is enabled
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// service row is enabled
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y_row = 31;
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}
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else
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{
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// Service row is disabled
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// service row is disabled
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for (int i = 0; i < 40 * 8; i++)
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m_tmp_bitmap.pix(m_offset_y + vpos, m_offset_x + i) = 8;
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return;
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@ -362,7 +363,7 @@ void ef9340_1_device::ef9340_scanline(int vpos)
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}
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else
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{
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// Displaying regular row
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// displaying regular row
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y_row = ((m_ef9340.Y0 & 0x1f) + (vpos - 10) / 10) % 24;
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}
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@ -12,6 +12,34 @@
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#pragma once
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// pinout reference
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/*
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______ ______ ______ ______
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Vss 1 |* \_/ | 40 A4 10*address Vss 1 |* \_/ | 40 A7
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A5 2 | | 39 A3 ------------> ADR0 2 | | 39 A6
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A6 3 | | 38 A2 | ADR1 3 | | 38 A5
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Vss 4 | | 37 A1 | ADR2 4 | | 37 A4
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CLK 5 | | 36 A0 v ADR3 5 | | 36 A3
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_VE 6 | | 35 ADR0 ___________ R/_WI 6 | | 35 A2
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C/_T 7 | | 34 ADR1 | | _SG 7 | | 34 A1
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B 8 | | 33 ADR2 | | _SM 8 | | 33 A0
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G 9 | | 32 ADR3 | | B7 9 | | 32 D0
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R 10 | EF9340 | 31 ADR4 | 2*1KB RAM | B6 10 | EF9341 | 31 D1
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I 11 | (VIN) | 30 ADR5 | | B5 11 | (GEN) | 30 D2
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_SM 12 | | 29 ADR6 | | B4 12 | | 29 D3
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_SG 13 | | 28 ADR7 | | B3 13 | | 28 D4
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_ST 14 | | 27 ADR8 |___________| B2 14 | | 27 D5
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R/_WI 15 | | 26 ADR9 B1 15 | | 26 D6
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TT 16 | | 25 TL ^ B0 16 | | 25 D7
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SYT 17 | | 24 TEST | _ST 17 | | 24 C/_T
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B7 18 | | 23 _RES v _VE 18 | | 23 R/_W
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B6 19 | | 22 A7 <-----------> _CS 19 | | 22 B/_A
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B5 20 |_______________| 21 Vcc 16*data E 20 |_______________| 21 Vcc
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*/
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class ef9340_1_device : public device_t,
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public device_video_interface
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{
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@ -48,7 +76,7 @@ protected:
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void ef9340_scanline(int vpos);
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/* timers */
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// timers
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static constexpr device_timer_id TIMER_LINE = 0;
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static constexpr device_timer_id TIMER_BLINK = 1;
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@ -36,8 +36,6 @@
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*/
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// ======================> i8244_device
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class i8244_device : public device_t
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, public device_sound_interface
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, public device_video_interface
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