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author Robbbert <pac0446@bigpond.net.au>2015-09-26 20:12:27 +1000
committer Robbbert <pac0446@bigpond.net.au>2015-09-26 20:12:27 +1000
commit634147b1b3b9c644cd5e144945afdc4139bd9a13 (patch)
tree3cf213535742e0d0008008626a3a4c6e51726bd4 /src/mess
parent77545a2035152817469766c68f9a66a14662ecba (diff)
bcs3: Various improvements.
Diffstat (limited to 'src/mess')
-rw-r--r--src/mess/drivers/bcs3.c554
1 files changed, 259 insertions, 295 deletions
diff --git a/src/mess/drivers/bcs3.c b/src/mess/drivers/bcs3.c
index f5986a62287..8292aedd270 100644
--- a/src/mess/drivers/bcs3.c
+++ b/src/mess/drivers/bcs3.c
@@ -4,247 +4,221 @@
BCS 3
- 12/05/2009 Skeleton driver.
+ 2009-05-12 Skeleton driver.
+ 2015-09-25 Improvements
- Everything in this driver has been worked out by reading the
- ROM and using the debugger, as no information is available.
+ http://hc-ddr.hucki.net/wiki/doku.php/homecomputer:bcs3
- Therefore, it is likely to be full of mistakes and omissions.
+ East German home built computer. No sound facilities.
+ All documents are in German.
- Note: The $ key makes a square symbol.
+ Main CPU is a U880 (Z80 equivalent). Other ICs also have unusual names.
+
+ The CTC sends an interrupt every so often. This uses a lookup table to
+ jump to an address in the range 38xx-39xx. This seems to work much the
+ same as reading video memory in the ZX80. This, I think, is to stop snow
+ appearing on the screen. It also slows everything down noticeably.
+
+ It appears that a read of 1400 activates the Z80's /WAIT pin. This will
+ be released by a VS pulse. (Not emulated)
+
+ Cassette is hooked up according to the documentation, but it doesn't work.
+
+ Known Memory Map:
+ 0000 - 0FFF: Main ROM
+ 1000 - 13FF: Keyboard
+ 1400 - 17FF: /WAIT circuit
+ 1800 - 1BFF: Output one character's scanline to the monitor. ZX-video process.
+ 1C00 - 1FFF: Video RAM
+ 2000 - 3FFF: Mirror of 0000 - 1FFF.
+ 4000 - up : Extra RAM (required for hack versions)
+
+ Hack versions:
+ - They are fitted with Basic 3.x, require more RAM, and use hardware scrolling.
+ - No schematic has been found, so the code is educated guesswork.
+ - The ZX process is still to be worked out. For now, we return 0xF7 to finish.
+ - There is a machine-language monitor fitted to some models. To access:
+ -- Y = USR(0F000H)
+ -- Commands are S (substitute), M (move), T (test), G (go), Q (quit)
+
+ To Do:
+ - Need software
+ - Fix cassette
+ - Hack versions: fix the ZX process
****************************************************************************/
#include "emu.h"
#include "cpu/z80/z80.h"
+#include "cpu/z80/z80daisy.h"
+#include "machine/z80ctc.h"
+#include "imagedev/cassette.h"
class bcs3_state : public driver_device
{
public:
bcs3_state(const machine_config &mconfig, device_type type, const char *tag)
- : driver_device(mconfig, type, tag),
- m_maincpu(*this, "maincpu"),
- m_p_chargen(*this, "chargen"),
- m_p_videoram(*this, "videoram"),
- m_io_line0(*this, "LINE0"),
- m_io_line1(*this, "LINE1"),
- m_io_line2(*this, "LINE2"),
- m_io_line3(*this, "LINE3"),
- m_io_line4(*this, "LINE4"),
- m_io_line5(*this, "LINE5"),
- m_io_line6(*this, "LINE6"),
- m_io_line7(*this, "LINE7"),
- m_io_line8(*this, "LINE8")
+ : driver_device(mconfig, type, tag)
+ , m_maincpu(*this, "maincpu")
+ , m_ctc(*this, "ctc")
+ , m_p_chargen(*this, "chargen")
+ , m_p_videoram(*this, "videoram")
+ , m_cass(*this, "cassette")
+ , m_io_keyboard(*this, "KEY")
{ }
+ DECLARE_READ8_MEMBER(keyboard_r);
+ DECLARE_READ8_MEMBER(video_r);
+ DECLARE_READ8_MEMBER(zx_r);
+ DECLARE_WRITE_LINE_MEMBER(ctc_z0_w);
+ DECLARE_WRITE_LINE_MEMBER(ctc_z1_w);
+ DECLARE_DRIVER_INIT(bcs3a);
+ DECLARE_DRIVER_INIT(bcs3b);
+ DECLARE_DRIVER_INIT(bcs3c);
+ DECLARE_DRIVER_INIT(bcs3d);
+ UINT32 screen_update_bcs3(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
+ UINT32 screen_update_bcs3a(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
+
+private:
+ bool m_cass_bit;
+ UINT8 s_curs;
+ UINT8 s_init;
+ UINT8 s_rows;
+ UINT8 s_cols;
+
required_device<cpu_device> m_maincpu;
+ required_device<z80ctc_device> m_ctc;
required_memory_region m_p_chargen;
required_shared_ptr<UINT8> m_p_videoram;
- required_ioport m_io_line0;
- required_ioport m_io_line1;
- required_ioport m_io_line2;
- required_ioport m_io_line3;
- required_ioport m_io_line4;
- required_ioport m_io_line5;
- required_ioport m_io_line6;
- required_ioport m_io_line7;
- required_ioport m_io_line8;
- DECLARE_READ8_MEMBER(bcs3_keyboard_r);
- virtual void machine_reset();
- virtual void video_start();
- UINT32 screen_update_bcs3(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
- UINT32 screen_update_bcs3a(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
- UINT32 screen_update_bcs3b(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
- UINT32 screen_update_bcs3c(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
+ required_device<cassette_image_device> m_cass;
+ required_ioport_array<10> m_io_keyboard;
};
-READ8_MEMBER( bcs3_state::bcs3_keyboard_r )
+READ8_MEMBER( bcs3_state::keyboard_r )
{
- UINT8 data = 0;
-
- if (~offset & 0x01)
- data |= m_io_line0->read();
- if (~offset & 0x02)
- data |= m_io_line1->read();
- if (~offset & 0x04)
- data |= m_io_line2->read();
- if (~offset & 0x08)
- data |= m_io_line3->read();
- if (~offset & 0x10)
- data |= m_io_line4->read();
- if (~offset & 0x20)
- data |= m_io_line5->read();
- if (~offset & 0x40)
- data |= m_io_line6->read();
- if (~offset & 0x80)
- data |= m_io_line7->read();
- if (~offset & 0x100)
- data |= m_io_line8->read();
+ UINT8 i, data = 0;
+
+ if (offset == 0)
+ data = (m_cass->input() > +0.01) ? 0x80 : 0;
+
+ offset ^= 0x3ff;
+
+ for (i = 0; i < 10; i++)
+ if BIT(offset, i)
+ data |= m_io_keyboard[i]->read();
return data;
}
-static ADDRESS_MAP_START(bcs3_mem, AS_PROGRAM, 8, bcs3_state)
- ADDRESS_MAP_UNMAP_HIGH
- AM_RANGE( 0x0000, 0x0fff ) AM_ROM
- AM_RANGE( 0x1000, 0x11ff ) AM_READ_PORT("LINE9")
- AM_RANGE( 0x1200, 0x13ff ) AM_READ(bcs3_keyboard_r)
- AM_RANGE( 0x3c00, 0xffff ) AM_RAM
- AM_RANGE( 0x3c50, 0x3d9f ) AM_RAM AM_SHARE("videoram")
-ADDRESS_MAP_END
+// 00-7F = NUL, 0xE0 = end of line.
+READ8_MEMBER( bcs3_state::video_r )
+{
+ UINT8 data = m_p_videoram[offset];
+ return BIT(data, 7) ? data : 0;
+}
-static ADDRESS_MAP_START(bcs3a_mem, AS_PROGRAM, 8, bcs3_state)
- ADDRESS_MAP_UNMAP_HIGH
- AM_RANGE( 0x0000, 0x0fff ) AM_ROM
- AM_RANGE( 0x1000, 0x11ff ) AM_READ_PORT("LINE9")
- AM_RANGE( 0x1200, 0x13ff ) AM_READ(bcs3_keyboard_r)
- AM_RANGE( 0x3c00, 0xefff ) AM_RAM
- AM_RANGE( 0x3c00, 0x5a7f ) AM_RAM AM_SHARE("videoram")
- AM_RANGE( 0xf000, 0xf3ff ) AM_ROM
-ADDRESS_MAP_END
+// Unsure of how this works.
+// 00-7F = NUL, 0xFF = end of line, 0xF7 = finish.
+READ8_MEMBER( bcs3_state::zx_r )
+{
+ return 0xf7;
+}
-static ADDRESS_MAP_START(bcs3b_mem, AS_PROGRAM, 8, bcs3_state)
+static ADDRESS_MAP_START(bcs3_mem, AS_PROGRAM, 8, bcs3_state)
ADDRESS_MAP_UNMAP_HIGH
- AM_RANGE( 0x0000, 0x0fff ) AM_ROM
- AM_RANGE( 0x1000, 0x11ff ) AM_READ_PORT("LINE9")
- AM_RANGE( 0x1200, 0x13ff ) AM_READ(bcs3_keyboard_r)
- AM_RANGE( 0x3c00, 0xefff ) AM_RAM
- AM_RANGE( 0x3c00, 0x657f ) AM_RAM AM_SHARE("videoram")
- AM_RANGE( 0xf000, 0xf3ff ) AM_ROM
+ AM_RANGE( 0x0000, 0x0fff ) AM_MIRROR(0x2000) AM_ROM AM_REGION("roms", 0)
+ AM_RANGE( 0x1000, 0x13ff ) AM_MIRROR(0x2000) AM_READ(keyboard_r)
+ AM_RANGE( 0x1400, 0x17ff ) AM_MIRROR(0x2000) AM_NOP // /WAIT circuit
+ AM_RANGE( 0x1800, 0x1bff ) AM_MIRROR(0x2000) AM_READ(video_r)
+ AM_RANGE( 0x1c00, 0x1fff ) AM_MIRROR(0x2000) AM_RAM AM_SHARE("videoram")
ADDRESS_MAP_END
-static ADDRESS_MAP_START(bcs3c_mem, AS_PROGRAM, 8, bcs3_state)
+static ADDRESS_MAP_START(bcs3a_mem, AS_PROGRAM, 8, bcs3_state)
ADDRESS_MAP_UNMAP_HIGH
- AM_RANGE( 0x0000, 0x0fff ) AM_ROM
- AM_RANGE( 0x1000, 0x11ff ) AM_READ_PORT("LINE9")
- AM_RANGE( 0x1200, 0x13ff ) AM_READ(bcs3_keyboard_r)
- AM_RANGE( 0x3c00, 0xffff ) AM_RAM
- AM_RANGE( 0x3c00, 0x5ab3 ) AM_RAM AM_SHARE("videoram")
+ AM_RANGE( 0x0000, 0x0fff ) AM_MIRROR(0x2000) AM_ROM AM_REGION("roms", 0)
+ AM_RANGE( 0x1000, 0x13ff ) AM_MIRROR(0x2000) AM_READ(keyboard_r)
+ AM_RANGE( 0x1400, 0x17ff ) AM_MIRROR(0x2000) AM_NOP // /WAIT circuit
+ AM_RANGE( 0x1800, 0x1bff ) AM_MIRROR(0x2000) AM_READ(zx_r)
+ AM_RANGE( 0x3c00, 0x7fff ) AM_RAM AM_SHARE("videoram")
+ AM_RANGE( 0xf000, 0xf3ff ) AM_ROM AM_REGION("roms", 0x1000)
ADDRESS_MAP_END
static ADDRESS_MAP_START( bcs3_io, AS_IO, 8, bcs3_state)
ADDRESS_MAP_UNMAP_HIGH
- ADDRESS_MAP_GLOBAL_MASK(0xff)
-// AM_RANGE( 0xf8, 0xfb ) AM_DEVREADWRITE(Z80CTC,"z80ctc",z80ctc_r,z80ctc_w)
+ ADDRESS_MAP_GLOBAL_MASK(3)
+ // coded in the rom as F8 to FB
+ AM_RANGE( 0x00, 0x03 ) AM_DEVREADWRITE("ctc", z80ctc_device, read, write)
ADDRESS_MAP_END
/* Input ports */
static INPUT_PORTS_START( bcs3 )
- PORT_START("LINE0")
- PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("U") PORT_CODE(KEYCODE_U) PORT_CHAR('H')
+ PORT_START("KEY.0")
+ PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("U") PORT_CODE(KEYCODE_U) PORT_CHAR('U')
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("K :") PORT_CODE(KEYCODE_K) PORT_CHAR('K') PORT_CHAR(':')
- PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("A &") PORT_CODE(KEYCODE_A) PORT_CHAR('A') PORT_CHAR('&')
- PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("0") PORT_CODE(KEYCODE_0) PORT_CHAR('O')
- PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNUSED)
-
- PORT_START("LINE1")
+ PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("A &") PORT_CODE(KEYCODE_A) PORT_CHAR('A')
+ PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("0") PORT_CODE(KEYCODE_0) PORT_CHAR('0')
+
+ PORT_START("KEY.1")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("V") PORT_CODE(KEYCODE_V) PORT_CHAR('V')
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("L ;") PORT_CODE(KEYCODE_L) PORT_CHAR('L') PORT_CHAR(';')
- PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("B '") PORT_CODE(KEYCODE_B) PORT_CHAR('B') PORT_CHAR(39)
+ PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("B '") PORT_CODE(KEYCODE_B) PORT_CHAR('B')
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("1 !") PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!')
- PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_START("LINE2")
+ PORT_START("KEY.2")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("W") PORT_CODE(KEYCODE_W) PORT_CHAR('W')
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("M <") PORT_CODE(KEYCODE_M) PORT_CHAR('M') PORT_CHAR('<')
- PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("C (") PORT_CODE(KEYCODE_C) PORT_CHAR('C') PORT_CHAR('(')
+ PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("C (") PORT_CODE(KEYCODE_C) PORT_CHAR('C')
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("2 \"") PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR(34)
- PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_START("LINE3")
+ PORT_START("KEY.3")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("X") PORT_CODE(KEYCODE_X) PORT_CHAR('X')
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("N =") PORT_CODE(KEYCODE_N) PORT_CHAR('N') PORT_CHAR('=')
- PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("D )") PORT_CODE(KEYCODE_D) PORT_CHAR('D') PORT_CHAR(')')
+ PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("D )") PORT_CODE(KEYCODE_D) PORT_CHAR('D')
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("3 #") PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#')
- PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_START("LINE4")
+ PORT_START("KEY.4")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Y") PORT_CODE(KEYCODE_Y) PORT_CHAR('Y')
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("O >") PORT_CODE(KEYCODE_O) PORT_CHAR('O') PORT_CHAR('>')
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("E *") PORT_CODE(KEYCODE_E) PORT_CHAR('E') PORT_CHAR('*')
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("4 $") PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$')
- PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_START("LINE5")
+ PORT_START("KEY.5")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Z") PORT_CODE(KEYCODE_Z) PORT_CHAR('Z')
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("P") PORT_CODE(KEYCODE_P) PORT_CHAR('P')
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F +") PORT_CODE(KEYCODE_F) PORT_CHAR('F') PORT_CHAR('+')
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("5 %") PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%')
- PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_START("LINE6")
+ PORT_START("KEY.6")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Space") PORT_CODE(KEYCODE_SPACE) PORT_CHAR(32)
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Q") PORT_CODE(KEYCODE_Q) PORT_CHAR('Q')
- PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("G ,") PORT_CODE(KEYCODE_G) PORT_CHAR('G') PORT_CHAR('.')
+ PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("G ,") PORT_CODE(KEYCODE_G) PORT_CHAR('G') PORT_CHAR(',')
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("6 &") PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&')
- PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_START("LINE7")
+ PORT_START("KEY.7")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Backspace") PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8)
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("R") PORT_CODE(KEYCODE_R) PORT_CHAR('R')
- PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("H -") PORT_CODE(KEYCODE_H) PORT_CHAR('H')
- PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("7 '") PORT_CODE(KEYCODE_7) PORT_CHAR('7')
- PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNUSED)
-
- PORT_START("LINE8")
+ PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("H -") PORT_CODE(KEYCODE_H) PORT_CHAR('H') PORT_CHAR('-')
+ PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("7 '") PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR(39)
+
+ PORT_START("KEY.8")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Enter") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13)
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("S") PORT_CODE(KEYCODE_S) PORT_CHAR('S')
- PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("I .") PORT_CODE(KEYCODE_I) PORT_CHAR('I')
- PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("8 (") PORT_CODE(KEYCODE_8) PORT_CHAR('8')
- PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNUSED)
-
- PORT_START("LINE9")
+ PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("I .") PORT_CODE(KEYCODE_I) PORT_CHAR('I') PORT_CHAR('.')
+ PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("8 (") PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('(')
+
+ PORT_START("KEY.9")
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Shift") PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("T") PORT_CODE(KEYCODE_T) PORT_CHAR('T')
- PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("J /") PORT_CODE(KEYCODE_J) PORT_CHAR('J')
- PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("9 )") PORT_CODE(KEYCODE_9) PORT_CHAR('9')
- PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_UNUSED)
- PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_UNUSED) // cassette read bit
+ PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("J /") PORT_CODE(KEYCODE_J) PORT_CHAR('J') PORT_CHAR('/')
+ PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("9 )") PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR(')')
INPUT_PORTS_END
-
-void bcs3_state::machine_reset()
-{
-}
-
-void bcs3_state::video_start()
-{
-}
-
+// Official version
UINT32 bcs3_state::screen_update_bcs3(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
UINT8 y,ra,chr,gfx,rat;
- UINT16 sy=0,ma=0,x;
+ UINT16 sy=0,ma=0x50,x;
for (y = 0; y < 12; y++)
{
@@ -281,24 +255,24 @@ UINT32 bcs3_state::screen_update_bcs3(screen_device &screen, bitmap_ind16 &bitma
return 0;
}
-/* This has 100 lines of screen data. I'm assuming that it only shows a portion of this,
- with the cursor always in sight. */
+/* Hacks: When it starts, it has 4 lines of data. Pressing enter causes it to allocate 100 lines.
+ I'm assuming that it only shows a portion of this, with the cursor always in sight. */
UINT32 bcs3_state::screen_update_bcs3a(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
UINT8 y,ra,chr,gfx,rat;
- UINT16 sy=0,ma=128,x;
- UINT16 cursor = (m_p_videoram[0x7a] | (m_p_videoram[0x7b] << 8)) - 0x3c80; // get cursor relative position
- rat = cursor / 30;
- if (rat > 11) ma = (rat-11) * 30 + 128;
+ UINT16 sy = 0, ma = s_init, x;
+ UINT16 cursor = (m_p_videoram[s_curs] | (m_p_videoram[s_curs+1] << 8)) - 0x3c00 - ma; // get cursor relative position
+ rat = cursor / (s_cols+1);
+ if (rat > (s_rows-1)) ma += (rat-(s_rows-1)) * (s_cols+1);
- for (y = 0; y < 12; y++)
+ for (y = 0; y < s_rows; y++)
{
for (ra = 0; ra < 10; ra++)
{
UINT16 *p = &bitmap.pix16(sy++);
rat = (ra + 1) & 7;
- for (x = ma; x < ma + 29; x++)
+ for (x = ma; x < ma + s_cols; x++)
{
if (ra < 8)
{
@@ -321,96 +295,11 @@ UINT32 bcs3_state::screen_update_bcs3a(screen_device &screen, bitmap_ind16 &bitm
*p++ = BIT(gfx, 0);
}
}
- ma+=30;
+ ma+=(s_cols+1);
}
return 0;
}
-UINT32 bcs3_state::screen_update_bcs3b(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
-{
- UINT8 y,ra,chr,gfx,rat;
- UINT16 sy=0,ma=128,x;
- UINT16 cursor = (m_p_videoram[0x7a] | (m_p_videoram[0x7b] << 8)) - 0x3c80; // get cursor relative position
- rat = cursor / 41;
- if (rat > 23) ma = (rat-23) * 41 + 128;
-
- for (y = 0; y < 24; y++)
- {
- for (ra = 0; ra < 10; ra++)
- {
- UINT16 *p = &bitmap.pix16(sy++);
- rat = (ra + 1) & 7;
-
- for (x = ma; x < ma + 40; x++)
- {
- if (ra < 8)
- {
- chr = m_p_videoram[x] & 0x7f;
-
- /* get pattern of pixels for that character scanline */
- gfx = m_p_chargen->base()[(chr<<3) | rat ] ^ 0xff;
- }
- else
- gfx = 0xff;
-
- /* Display a scanline of a character (8 pixels) */
- *p++ = BIT(gfx, 7);
- *p++ = BIT(gfx, 6);
- *p++ = BIT(gfx, 5);
- *p++ = BIT(gfx, 4);
- *p++ = BIT(gfx, 3);
- *p++ = BIT(gfx, 2);
- *p++ = BIT(gfx, 1);
- *p++ = BIT(gfx, 0);
- }
- }
- ma+=41;
- }
- return 0;
-}
-
-UINT32 bcs3_state::screen_update_bcs3c(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
-{
- UINT8 y,ra,chr,gfx,rat;
- UINT16 sy=0,ma=0xb4,x;
- UINT16 cursor = (m_p_videoram[0x08] | (m_p_videoram[0x09] << 8)) - 0x3c80; // get cursor relative position
- rat = cursor / 30;
- if (rat > 11) ma = (rat-11) * 30 + 0xb4;
-
- for (y = 0; y < 12; y++)
- {
- for (ra = 0; ra < 10; ra++)
- {
- UINT16 *p = &bitmap.pix16(sy++);
- rat = (ra + 1) & 7;
-
- for (x = ma; x < ma + 29; x++)
- {
- if (ra < 8)
- {
- chr = m_p_videoram[x] & 0x7f;
-
- /* get pattern of pixels for that character scanline */
- gfx = m_p_chargen->base()[(chr<<3) | rat ] ^ 0xff;
- }
- else
- gfx = 0xff;
-
- /* Display a scanline of a character (8 pixels) */
- *p++ = BIT(gfx, 7);
- *p++ = BIT(gfx, 6);
- *p++ = BIT(gfx, 5);
- *p++ = BIT(gfx, 4);
- *p++ = BIT(gfx, 3);
- *p++ = BIT(gfx, 2);
- *p++ = BIT(gfx, 1);
- *p++ = BIT(gfx, 0);
- }
- }
- ma+=30;
- }
- return 0;
-}
/* F4 Character Displayer */
static const gfx_layout bcs3_charlayout =
@@ -430,13 +319,66 @@ static GFXDECODE_START( bcs3 )
GFXDECODE_ENTRY( "chargen", 0x0000, bcs3_charlayout, 0, 1 )
GFXDECODE_END
+WRITE_LINE_MEMBER( bcs3_state::ctc_z0_w )
+{
+ m_ctc->trg1(state);
+ if (state)
+ {
+ m_cass_bit ^= 1;
+ m_cass->output(m_cass_bit ? -1.0 : +1.0);
+ }
+}
+
+WRITE_LINE_MEMBER( bcs3_state::ctc_z1_w )
+{
+ m_ctc->trg2(state);
+}
+
+static const z80_daisy_config daisy_chain_intf[] =
+{
+ { "ctc" },
+ { NULL }
+};
+
+DRIVER_INIT_MEMBER( bcs3_state, bcs3a )
+{
+ s_curs = 0x7a;
+ s_init = 0x80;
+ s_rows = 12;
+ s_cols = 29;
+}
+
+DRIVER_INIT_MEMBER( bcs3_state, bcs3b )
+{
+ s_curs = 0x7a;
+ s_init = 0x80;
+ s_rows = 24;
+ s_cols = 40;
+}
+
+DRIVER_INIT_MEMBER( bcs3_state, bcs3c )
+{
+ s_curs = 0x08;
+ s_init = 0xa0;
+ s_rows = 12;
+ s_cols = 29;
+}
+
+DRIVER_INIT_MEMBER( bcs3_state, bcs3d )
+{
+ s_curs = 0x08;
+ s_init = 0xb4;
+ s_rows = 12;
+ s_cols = 29;
+}
static MACHINE_CONFIG_START( bcs3, bcs3_state )
/* basic machine hardware */
- MCFG_CPU_ADD("maincpu",Z80, XTAL_5MHz /2)
+ MCFG_CPU_ADD("maincpu", Z80, XTAL_5MHz /2)
MCFG_CPU_PROGRAM_MAP(bcs3_mem)
MCFG_CPU_IO_MAP(bcs3_io)
+ MCFG_CPU_CONFIG(daisy_chain_intf)
/* video hardware */
MCFG_SCREEN_ADD("screen", RASTER)
@@ -446,83 +388,105 @@ static MACHINE_CONFIG_START( bcs3, bcs3_state )
MCFG_SCREEN_VISIBLE_AREA(0,28*8-1,0,12*10-1)
MCFG_SCREEN_UPDATE_DRIVER(bcs3_state, screen_update_bcs3)
MCFG_SCREEN_PALETTE("palette")
-
MCFG_GFXDECODE_ADD("gfxdecode", "palette", bcs3)
MCFG_PALETTE_ADD_BLACK_AND_WHITE("palette")
+
+ MCFG_DEVICE_ADD("ctc", Z80CTC, XTAL_5MHz / 2)
+ MCFG_Z80CTC_INTR_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0))
+ MCFG_Z80CTC_ZC0_CB(WRITELINE(bcs3_state, ctc_z0_w))
+ MCFG_Z80CTC_ZC1_CB(WRITELINE(bcs3_state, ctc_z1_w))
+
+ MCFG_CASSETTE_ADD( "cassette" )
MACHINE_CONFIG_END
-static MACHINE_CONFIG_DERIVED( bcs3a, bcs3 )
+static MACHINE_CONFIG_START( bcs3a, bcs3_state )
+
/* basic machine hardware */
- MCFG_CPU_MODIFY( "maincpu" )
+ MCFG_CPU_ADD("maincpu", Z80, XTAL_7MHz /2)
MCFG_CPU_PROGRAM_MAP(bcs3a_mem)
+ MCFG_CPU_IO_MAP(bcs3_io)
+ MCFG_CPU_CONFIG(daisy_chain_intf)
- MCFG_SCREEN_MODIFY("screen")
+ /* video hardware */
+ MCFG_SCREEN_ADD("screen", RASTER)
+ MCFG_SCREEN_REFRESH_RATE(50)
+ MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
MCFG_SCREEN_SIZE(29*8, 12*10)
MCFG_SCREEN_VISIBLE_AREA(0,29*8-1,0,12*10-1)
MCFG_SCREEN_UPDATE_DRIVER(bcs3_state, screen_update_bcs3a)
-MACHINE_CONFIG_END
+ MCFG_SCREEN_PALETTE("palette")
+ MCFG_GFXDECODE_ADD("gfxdecode", "palette", bcs3)
+ MCFG_PALETTE_ADD_BLACK_AND_WHITE("palette")
-static MACHINE_CONFIG_DERIVED( bcs3b, bcs3 )
- /* basic machine hardware */
- MCFG_CPU_REPLACE( "maincpu", Z80, XTAL_7MHz / 2)
- MCFG_CPU_PROGRAM_MAP(bcs3b_mem)
+ MCFG_DEVICE_ADD("ctc", Z80CTC, XTAL_7MHz / 2)
+ MCFG_Z80CTC_INTR_CB(INPUTLINE("maincpu", INPUT_LINE_IRQ0))
+ MCFG_Z80CTC_ZC0_CB(WRITELINE(bcs3_state, ctc_z0_w))
+ MCFG_Z80CTC_ZC1_CB(WRITELINE(bcs3_state, ctc_z1_w))
+ MCFG_CASSETTE_ADD( "cassette" )
+MACHINE_CONFIG_END
+
+static MACHINE_CONFIG_DERIVED( bcs3b, bcs3a )
MCFG_SCREEN_MODIFY("screen")
MCFG_SCREEN_SIZE(40*8, 24*10)
MCFG_SCREEN_VISIBLE_AREA(0,40*8-1,0,24*10-1)
- MCFG_SCREEN_UPDATE_DRIVER(bcs3_state, screen_update_bcs3b)
MACHINE_CONFIG_END
-static MACHINE_CONFIG_DERIVED( bcs3c, bcs3 )
- /* basic machine hardware */
- MCFG_CPU_MODIFY( "maincpu" )
- MCFG_CPU_PROGRAM_MAP(bcs3c_mem)
-
- MCFG_SCREEN_MODIFY("screen")
- MCFG_SCREEN_SIZE(29*8, 12*10)
- MCFG_SCREEN_VISIBLE_AREA(0,29*8-1,0,12*10-1)
- MCFG_SCREEN_UPDATE_DRIVER(bcs3_state, screen_update_bcs3c)
-MACHINE_CONFIG_END
/* ROM definition */
ROM_START( bcs3 )
- ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
- ROM_LOAD( "se24.bin", 0x0000, 0x0800, CRC(268de5ee) SHA1(78784945956c1b0282a4e82ad55e7c3a77389e50))
+ ROM_REGION( 0x2000, "roms", ROMREGION_ERASEFF )
+ //ROM_LOAD( "se24.bin", 0x0000, 0x0800, CRC(268de5ee) SHA1(78784945956c1b0282a4e82ad55e7c3a77389e50))
+ ROM_LOAD( "se24_000.d6", 0x0000, 0x0400, CRC(157a0d28) SHA1(0a6666c289b95d98128fd282478dff6319031b6e) )
+ ROM_LOAD( "se24_400.d7", 0x0400, 0x0400, CRC(2159de0f) SHA1(09b567e750931019de914f25d5ab1e4910465de6) )
ROM_REGION( 0x0400, "chargen", 0 )
- ROM_LOAD( "se24font.bin", 0x0000, 0x0400, CRC(eaed9d84) SHA1(7023a6187cd6bd0c6489d76ff662453f14e5b636))
+ ROM_LOAD( "bcs_zg_24.d21", 0x0000, 0x0400, CRC(eaed9d84) SHA1(7023a6187cd6bd0c6489d76ff662453f14e5b636))
ROM_END
ROM_START( bcs3a )
- ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
- ROM_LOAD( "se31_29.bin", 0x0000, 0x1000, CRC(e9b55544) SHA1(82bae68c4bcaecf66632f5b43913b50a1acba316))
- ROM_LOAD( "se31mceditor.bin", 0xf000, 0x0400, CRC(8eac92ec) SHA1(8950a3ef05d02abf34269bfce002c46d273ce113))
+ ROM_REGION( 0x2000, "roms", ROMREGION_ERASEFF )
+ //ROM_LOAD( "se31_29.bin", 0x0000, 0x1000, CRC(e9b55544) SHA1(82bae68c4bcaecf66632f5b43913b50a1acba316))
+ ROM_LOAD( "se31_000.d6", 0x0000, 0x0400, CRC(0765bd83) SHA1(137ceffd50eeaf21caab286d3e01161ba3267ea4) )
+ ROM_LOAD( "se31_400.d7", 0x0400, 0x0400, CRC(1a87a3ed) SHA1(c8121ff198f8cf0c7bc7bc7e258ecfa51d3bb02c) )
+ ROM_LOAD( "se31_800.d8", 0x0800, 0x0400, CRC(05654a8f) SHA1(b42fa6cf5710dab23f062dbeea81e85b4c18e1b0) )
+ ROM_LOAD( "se31_c00.d9", 0x0c00, 0x0400, CRC(858ca28b) SHA1(90f943b0c1d102dd058a859ba139057a0bd278a6) )
+ ROM_LOAD( "se31mceditor.bin", 0x1000, 0x0400, CRC(8eac92ec) SHA1(8950a3ef05d02abf34269bfce002c46d273ce113))
ROM_REGION( 0x0400, "chargen", 0 )
- ROM_LOAD( "se31font.bin", 0x0000, 0x0400, CRC(a20c93c9) SHA1(b2be1c0d98b7ac05713349b099b392975968be1d))
+ ROM_LOAD( "bcs_zg_31.d21", 0x0000, 0x0400, CRC(a20c93c9) SHA1(b2be1c0d98b7ac05713349b099b392975968be1d))
ROM_END
ROM_START( bcs3b )
- ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
+ ROM_REGION( 0x2000, "roms", ROMREGION_ERASEFF )
ROM_LOAD( "se31_40.bin", 0x0000, 0x1000, CRC(4e993152) SHA1(6bb01ff5779627fa2eb2df432fffcfccc1e33231))
- ROM_LOAD( "se31mceditor.bin", 0xf000, 0x0400, CRC(8eac92ec) SHA1(8950a3ef05d02abf34269bfce002c46d273ce113))
+ ROM_LOAD( "se31mceditor.bin", 0x1000, 0x0400, CRC(8eac92ec) SHA1(8950a3ef05d02abf34269bfce002c46d273ce113))
ROM_REGION( 0x0400, "chargen", 0 )
- ROM_LOAD( "se31font.bin", 0x0000, 0x0400, CRC(a20c93c9) SHA1(b2be1c0d98b7ac05713349b099b392975968be1d))
+ ROM_LOAD( "bcs_zg_31.d21", 0x0000, 0x0400, CRC(a20c93c9) SHA1(b2be1c0d98b7ac05713349b099b392975968be1d))
ROM_END
ROM_START( bcs3c )
- ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
+ ROM_REGION( 0x2000, "roms", ROMREGION_ERASEFF )
+ ROM_LOAD( "bcs32.bin", 0x0000, 0x1000, CRC(1523b846) SHA1(ca5e3213707a604e02d9e7a7ebfc362ef294ddb8) )
+
+ ROM_REGION( 0x0400, "chargen", 0 )
+ ROM_LOAD( "bcs_zg_32.d21", 0x0000, 0x0400, CRC(abe9e820) SHA1(03a8792d08774cd67b98efd3f83a78e897b4e001) )
+ROM_END
+
+ROM_START( bcs3d )
+ ROM_REGION( 0x2000, "roms", ROMREGION_ERASEFF )
ROM_LOAD( "sp33_29.bin", 0x0000, 0x1000, CRC(1c851eb2) SHA1(4f8bb5274ea1861a35a840e8f3482bdc693047c4))
ROM_REGION( 0x0400, "chargen", 0 )
- ROM_LOAD( "sp33font.bin", 0x0000, 0x0400, CRC(b27f1c07) SHA1(61c80c585f198370ba5e856839c12b15acdc58ee))
+ ROM_LOAD( "bcs_zg_33.d21", 0x0000, 0x0400, CRC(b27f1c07) SHA1(61c80c585f198370ba5e856839c12b15acdc58ee))
ROM_END
/* Driver */
-/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */
-COMP( 1984, bcs3, 0, 0, bcs3, bcs3, driver_device, 0, "Eckhard Schiller", "BCS 3 rev 2.4", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)
-COMP( 1986, bcs3a, bcs3, 0, bcs3a, bcs3, driver_device, 0, "Eckhard Schiller", "BCS 3 rev 3.1 29-column", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)
-COMP( 1986, bcs3b, bcs3, 0, bcs3b, bcs3, driver_device, 0, "Eckhard Schiller", "BCS 3 rev 3.1 40-column", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)
-COMP( 198?, bcs3c, bcs3, 0, bcs3c, bcs3, driver_device, 0, "Eckhard Schiller", "BCS 3 rev 3.3", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)
+/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */
+COMP( 1984, bcs3, 0, 0, bcs3, bcs3, driver_device, 0, "Eckhard Schiller", "BCS 3 rev 2.4", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW )
+COMP( 1986, bcs3a, bcs3, 0, bcs3a, bcs3, bcs3_state, bcs3a, "Eckhard Schiller", "BCS 3 rev 3.1 29-column", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW )
+COMP( 1986, bcs3b, bcs3, 0, bcs3b, bcs3, bcs3_state, bcs3b, "Eckhard Schiller", "BCS 3 rev 3.1 40-column", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW )
+COMP( 1986, bcs3c, bcs3, 0, bcs3a, bcs3, bcs3_state, bcs3c, "Eckhard Schiller", "BCS 3 rev 3.2", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW )
+COMP( 1986, bcs3d, bcs3, 0, bcs3a, bcs3, bcs3_state, bcs3d, "Eckhard Schiller", "BCS 3 rev 3.3", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW )