/
tx0.cpp
1666 lines (1447 loc) · 52.6 KB
/
tx0.cpp
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// license:GPL-2.0+
// copyright-holders:Raphael Nabet
/*
TX-0
Raphael Nabet, 2004
*/
#include "emu.h"
#include "tx0.h"
#include "imagedev/magtape.h"
#include "imagedev/papertape.h"
#include "screen.h"
#include "softlist_dev.h"
/*
TODO:
- due to no known software, it is unknown if this system is capable of running anything.
*/
void tx0_state::init_tx0()
{
static const unsigned char fontdata6x8[tx0_fontdata_size] =
{ /* ASCII characters */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x20,0x20,0x20,0x00,0x20,0x00,
0x50,0x50,0x50,0x00,0x00,0x00,0x00,0x00,0x00,0x50,0xf8,0x50,0xf8,0x50,0x00,0x00,
0x20,0x70,0xc0,0x70,0x18,0xf0,0x20,0x00,0x40,0xa4,0x48,0x10,0x20,0x48,0x94,0x08,
0x60,0x90,0xa0,0x40,0xa8,0x90,0x68,0x00,0x10,0x20,0x40,0x00,0x00,0x00,0x00,0x00,
0x20,0x40,0x40,0x40,0x40,0x40,0x20,0x00,0x10,0x08,0x08,0x08,0x08,0x08,0x10,0x00,
0x20,0xa8,0x70,0xf8,0x70,0xa8,0x20,0x00,0x00,0x20,0x20,0xf8,0x20,0x20,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x30,0x30,0x60,0x00,0x00,0x00,0xf8,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x30,0x30,0x00,0x00,0x08,0x10,0x20,0x40,0x80,0x00,0x00,
0x70,0x88,0x88,0x88,0x88,0x88,0x70,0x00,0x10,0x30,0x10,0x10,0x10,0x10,0x10,0x00,
0x70,0x88,0x08,0x10,0x20,0x40,0xf8,0x00,0x70,0x88,0x08,0x30,0x08,0x88,0x70,0x00,
0x10,0x30,0x50,0x90,0xf8,0x10,0x10,0x00,0xf8,0x80,0xf0,0x08,0x08,0x88,0x70,0x00,
0x70,0x80,0xf0,0x88,0x88,0x88,0x70,0x00,0xf8,0x08,0x08,0x10,0x20,0x20,0x20,0x00,
0x70,0x88,0x88,0x70,0x88,0x88,0x70,0x00,0x70,0x88,0x88,0x88,0x78,0x08,0x70,0x00,
0x00,0x00,0x30,0x30,0x00,0x30,0x30,0x00,0x00,0x00,0x30,0x30,0x00,0x30,0x30,0x60,
0x10,0x20,0x40,0x80,0x40,0x20,0x10,0x00,0x00,0x00,0xf8,0x00,0xf8,0x00,0x00,0x00,
0x40,0x20,0x10,0x08,0x10,0x20,0x40,0x00,0x70,0x88,0x08,0x10,0x20,0x00,0x20,0x00,
0x70,0x88,0xb8,0xa8,0xb8,0x80,0x70,0x00,0x70,0x88,0x88,0xf8,0x88,0x88,0x88,0x00,
0xf0,0x88,0x88,0xf0,0x88,0x88,0xf0,0x00,0x70,0x88,0x80,0x80,0x80,0x88,0x70,0x00,
0xf0,0x88,0x88,0x88,0x88,0x88,0xf0,0x00,0xf8,0x80,0x80,0xf0,0x80,0x80,0xf8,0x00,
0xf8,0x80,0x80,0xf0,0x80,0x80,0x80,0x00,0x70,0x88,0x80,0x98,0x88,0x88,0x70,0x00,
0x88,0x88,0x88,0xf8,0x88,0x88,0x88,0x00,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x00,
0x08,0x08,0x08,0x08,0x88,0x88,0x70,0x00,0x88,0x90,0xa0,0xc0,0xa0,0x90,0x88,0x00,
0x80,0x80,0x80,0x80,0x80,0x80,0xf8,0x00,0x88,0xd8,0xa8,0x88,0x88,0x88,0x88,0x00,
0x88,0xc8,0xa8,0x98,0x88,0x88,0x88,0x00,0x70,0x88,0x88,0x88,0x88,0x88,0x70,0x00,
0xf0,0x88,0x88,0xf0,0x80,0x80,0x80,0x00,0x70,0x88,0x88,0x88,0x88,0x88,0x70,0x08,
0xf0,0x88,0x88,0xf0,0x88,0x88,0x88,0x00,0x70,0x88,0x80,0x70,0x08,0x88,0x70,0x00,
0xf8,0x20,0x20,0x20,0x20,0x20,0x20,0x00,0x88,0x88,0x88,0x88,0x88,0x88,0x70,0x00,
0x88,0x88,0x88,0x88,0x88,0x50,0x20,0x00,0x88,0x88,0x88,0x88,0xa8,0xd8,0x88,0x00,
0x88,0x50,0x20,0x20,0x20,0x50,0x88,0x00,0x88,0x88,0x88,0x50,0x20,0x20,0x20,0x00,
0xf8,0x08,0x10,0x20,0x40,0x80,0xf8,0x00,0x30,0x20,0x20,0x20,0x20,0x20,0x30,0x00,
0x40,0x40,0x20,0x20,0x10,0x10,0x08,0x08,0x30,0x10,0x10,0x10,0x10,0x10,0x30,0x00,
0x20,0x50,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xfc,
0x40,0x20,0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x70,0x08,0x78,0x88,0x78,0x00,
0x80,0x80,0xf0,0x88,0x88,0x88,0xf0,0x00,0x00,0x00,0x70,0x88,0x80,0x80,0x78,0x00,
0x08,0x08,0x78,0x88,0x88,0x88,0x78,0x00,0x00,0x00,0x70,0x88,0xf8,0x80,0x78,0x00,
0x18,0x20,0x70,0x20,0x20,0x20,0x20,0x00,0x00,0x00,0x78,0x88,0x88,0x78,0x08,0x70,
0x80,0x80,0xf0,0x88,0x88,0x88,0x88,0x00,0x20,0x00,0x20,0x20,0x20,0x20,0x20,0x00,
0x20,0x00,0x20,0x20,0x20,0x20,0x20,0xc0,0x80,0x80,0x90,0xa0,0xe0,0x90,0x88,0x00,
0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x00,0x00,0x00,0xf0,0xa8,0xa8,0xa8,0xa8,0x00,
0x00,0x00,0xb0,0xc8,0x88,0x88,0x88,0x00,0x00,0x00,0x70,0x88,0x88,0x88,0x70,0x00,
0x00,0x00,0xf0,0x88,0x88,0xf0,0x80,0x80,0x00,0x00,0x78,0x88,0x88,0x78,0x08,0x08,
0x00,0x00,0xb0,0xc8,0x80,0x80,0x80,0x00,0x00,0x00,0x78,0x80,0x70,0x08,0xf0,0x00,
0x20,0x20,0x70,0x20,0x20,0x20,0x18,0x00,0x00,0x00,0x88,0x88,0x88,0x98,0x68,0x00,
0x00,0x00,0x88,0x88,0x88,0x50,0x20,0x00,0x00,0x00,0xa8,0xa8,0xa8,0xa8,0x50,0x00,
0x00,0x00,0x88,0x50,0x20,0x50,0x88,0x00,0x00,0x00,0x88,0x88,0x88,0x78,0x08,0x70,
0x00,0x00,0xf8,0x10,0x20,0x40,0xf8,0x00,0x08,0x10,0x10,0x20,0x10,0x10,0x08,0x00,
0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x40,0x20,0x20,0x10,0x20,0x20,0x40,0x00,
0x00,0x68,0xb0,0x00,0x00,0x00,0x00,0x00,0x20,0x50,0x20,0x50,0xa8,0x50,0x00,0x00,
};
/* set up our font */
uint8_t *dst = memregion("gfx1")->base();
memcpy(dst, fontdata6x8, tx0_fontdata_size);
}
void tx0_state::tx0_64kw_map(address_map &map)
{
map(0x0000, 0xffff).ram();
}
void tx0_state::tx0_8kw_map(address_map &map)
{
map(0x0000, 0x1fff).ram();
}
static INPUT_PORTS_START( tx0 )
PORT_START("CSW") /* 0: various tx0 operator control panel switches */
PORT_BIT(tx0_control, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("control panel key") PORT_CODE(KEYCODE_LCONTROL)
PORT_BIT(tx0_stop_cyc0, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("stop at cycle 0") PORT_CODE(KEYCODE_Q)
PORT_BIT(tx0_stop_cyc1, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("stop at cycle 1") PORT_CODE(KEYCODE_W)
PORT_BIT(tx0_gbl_cm_sel, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("CM select") PORT_CODE(KEYCODE_E)
PORT_BIT(tx0_stop, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("stop") PORT_CODE(KEYCODE_P)
PORT_BIT(tx0_restart, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("restart") PORT_CODE(KEYCODE_O)
PORT_BIT(tx0_read_in, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("read in") PORT_CODE(KEYCODE_ENTER)
PORT_BIT(tx0_toggle_dn, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("edit next toggle switch register") PORT_CODE(KEYCODE_DOWN)
PORT_BIT(tx0_toggle_up, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("edit previous toggle switch register") PORT_CODE(KEYCODE_UP)
PORT_BIT(tx0_cm_sel, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("TSS CM switch") PORT_CODE(KEYCODE_A)
PORT_BIT(tx0_lr_sel, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("TSS LR switch") PORT_CODE(KEYCODE_SLASH)
PORT_START("MSW") /* 1: operator control panel toggle switch register switches MS */
PORT_BIT( 0002, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Toggle Switch Register Switch 0") PORT_CODE(KEYCODE_S)
PORT_BIT( 0001, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Toggle Switch Register Switch 1") PORT_CODE(KEYCODE_D)
PORT_START("LSW") /* 2: operator control panel toggle switch register switches LS */
PORT_BIT( 0100000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Toggle Switch Register Switch 2") PORT_CODE(KEYCODE_F)
PORT_BIT( 0040000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Toggle Switch Register Switch 3") PORT_CODE(KEYCODE_G)
PORT_BIT( 0020000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Toggle Switch Register Switch 4") PORT_CODE(KEYCODE_H)
PORT_BIT( 0010000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Toggle Switch Register Switch 5") PORT_CODE(KEYCODE_J)
PORT_BIT( 0004000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Toggle Switch Register Switch 6") PORT_CODE(KEYCODE_K)
PORT_BIT( 0002000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Toggle Switch Register Switch 7") PORT_CODE(KEYCODE_L)
PORT_BIT( 0001000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Toggle Switch Register Switch 8") PORT_CODE(KEYCODE_COLON)
PORT_BIT( 0000400, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Toggle Switch Register Switch 9") PORT_CODE(KEYCODE_Z)
PORT_BIT( 0000200, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Toggle Switch Register Switch 10") PORT_CODE(KEYCODE_X)
PORT_BIT( 0000100, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Toggle Switch Register Switch 11") PORT_CODE(KEYCODE_C)
PORT_BIT( 0000040, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Toggle Switch Register Switch 12") PORT_CODE(KEYCODE_V)
PORT_BIT( 0000020, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Toggle Switch Register Switch 13") PORT_CODE(KEYCODE_B)
PORT_BIT( 0000010, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Toggle Switch Register Switch 14") PORT_CODE(KEYCODE_N)
PORT_BIT( 0000004, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Toggle Switch Register Switch 15") PORT_CODE(KEYCODE_M)
PORT_BIT( 0000002, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Toggle Switch Register Switch 16") PORT_CODE(KEYCODE_COMMA)
PORT_BIT( 0000001, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Toggle Switch Register Switch 17") PORT_CODE(KEYCODE_STOP)
PORT_START("TWR.0") /* 3: typewriter codes 00-17 */
PORT_BIT(0x0004, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("E") PORT_CODE(KEYCODE_E)
PORT_BIT(0x0008, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("8") PORT_CODE(KEYCODE_8)
PORT_BIT(0x0020, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("| _") PORT_CODE(KEYCODE_SLASH)
PORT_BIT(0x0040, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("A") PORT_CODE(KEYCODE_A)
PORT_BIT(0x0080, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("3") PORT_CODE(KEYCODE_3)
PORT_BIT(0x0100, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("(Space)") PORT_CODE(KEYCODE_SPACE)
PORT_BIT(0x0200, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("= :") PORT_CODE(KEYCODE_EQUALS)
PORT_BIT(0x0400, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("S") PORT_CODE(KEYCODE_S)
PORT_BIT(0x0800, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("4") PORT_CODE(KEYCODE_4)
PORT_BIT(0x1000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("I") PORT_CODE(KEYCODE_I)
PORT_BIT(0x2000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("+ /") PORT_CODE(KEYCODE_QUOTE)
PORT_BIT(0x4000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("U") PORT_CODE(KEYCODE_U)
PORT_BIT(0x8000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("2") PORT_CODE(KEYCODE_2)
PORT_START("TWR.1") /* 4: typewriter codes 20-37 */
PORT_BIT(0x0002, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME(". )") PORT_CODE(KEYCODE_STOP)
PORT_BIT(0x0004, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("D") PORT_CODE(KEYCODE_D)
PORT_BIT(0x0008, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("5") PORT_CODE(KEYCODE_5)
PORT_BIT(0x0010, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("R") PORT_CODE(KEYCODE_R)
PORT_BIT(0x0020, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("1") PORT_CODE(KEYCODE_1)
PORT_BIT(0x0040, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("J") PORT_CODE(KEYCODE_J)
PORT_BIT(0x0080, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("7") PORT_CODE(KEYCODE_7)
PORT_BIT(0x0100, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("N") PORT_CODE(KEYCODE_N)
PORT_BIT(0x0200, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME(". (") PORT_CODE(KEYCODE_COMMA)
PORT_BIT(0x0400, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F") PORT_CODE(KEYCODE_F)
PORT_BIT(0x0800, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("6") PORT_CODE(KEYCODE_6)
PORT_BIT(0x1000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("C") PORT_CODE(KEYCODE_C)
PORT_BIT(0x2000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("- +") PORT_CODE(KEYCODE_MINUS)
PORT_BIT(0x4000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("K") PORT_CODE(KEYCODE_K)
PORT_START("TWR.2") /* 5: typewriter codes 40-57 */
PORT_BIT(0x0001, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("T") PORT_CODE(KEYCODE_T)
PORT_BIT(0x0004, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Z") PORT_CODE(KEYCODE_Z)
PORT_BIT(0x0008, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Backspace") PORT_CODE(KEYCODE_BACKSPACE)
PORT_BIT(0x0010, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("L") PORT_CODE(KEYCODE_L)
PORT_BIT(0x0020, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Tab Key") PORT_CODE(KEYCODE_TAB)
PORT_BIT(0x0040, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("W") PORT_CODE(KEYCODE_W)
PORT_BIT(0x0100, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("H") PORT_CODE(KEYCODE_H)
PORT_BIT(0x0200, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Return") PORT_CODE(KEYCODE_ENTER)
PORT_BIT(0x0400, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Y") PORT_CODE(KEYCODE_Y)
PORT_BIT(0x1000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("P") PORT_CODE(KEYCODE_P)
PORT_BIT(0x4000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Q") PORT_CODE(KEYCODE_Q)
PORT_START("TWR.3") /* 6: typewriter codes 60-77 */
PORT_BIT(0x0001, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("O") PORT_CODE(KEYCODE_O)
PORT_BIT(0x0004, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("B") PORT_CODE(KEYCODE_B)
PORT_BIT(0x0010, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("G") PORT_CODE(KEYCODE_G)
PORT_BIT(0x0040, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("9") PORT_CODE(KEYCODE_9)
PORT_BIT(0x0100, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("M") PORT_CODE(KEYCODE_M)
PORT_BIT(0x0200, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Upper case") PORT_CODE(KEYCODE_CAPSLOCK)
PORT_BIT(0x0400, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("X") PORT_CODE(KEYCODE_X)
PORT_BIT(0x1000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("V") PORT_CODE(KEYCODE_V)
PORT_BIT(0x2000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Lower Case") PORT_CODE(KEYCODE_LSHIFT)
PORT_BIT(0x4000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("0") PORT_CODE(KEYCODE_0)
INPUT_PORTS_END
static const gfx_layout fontlayout =
{
6, 8, /* 6*8 characters */
tx0_charnum, /* 96+xx characters */
1, /* 1 bit per pixel */
{ 0 },
{ 0, 1, 2, 3, 4, 5, 6, 7 }, /* straightforward layout */
{ 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8 },
8*8 /* every char takes 8 consecutive bytes */
};
/*
The static palette only includes the pens for the control panel and
the typewriter, as the CRT palette is generated dynamically.
The CRT palette defines various levels of intensity between white and
black. Grey levels follow an exponential law, so that decrementing the
color index periodically will simulate the remanence of a cathode ray tube.
*/
static const uint8_t tx0_colors[] =
{
0x00,0x00,0x00, /* black */
0xFF,0xFF,0xFF, /* white */
0x00,0xFF,0x00, /* green */
0x00,0x40,0x00, /* dark green */
0xFF,0x00,0x00, /* red */
0x80,0x80,0x80 /* light gray */
};
static const uint8_t tx0_pens[] =
{
pen_panel_bg, pen_panel_caption, /* captions */
pen_typewriter_bg, pen_black, /* black typing in typewriter */
pen_typewriter_bg, pen_red /* red typing in typewriter */
};
static const uint8_t total_colors_needed = pen_crt_num_levels + sizeof(tx0_colors) / 3;
static GFXDECODE_START( gfx_tx0 )
GFXDECODE_ENTRY( "gfx1", 0, fontlayout, pen_crt_num_levels + sizeof(tx0_colors) / 3, 3 )
GFXDECODE_END
/* Initialise the palette */
void tx0_state::tx0_palette(palette_device &palette) const
{
/* rgb components for the two color emissions */
const double r1 = .1, g1 = .1, b1 = .924, r2 = .7, g2 = .7, b2 = .076;
/* half period in seconds for the two color emissions */
const double half_period_1 = .05, half_period_2 = .20;
/* refresh period in seconds */
const double update_period = 1./refresh_rate;
double decay_1, decay_2;
double cur_level_1, cur_level_2;
#if 0
#ifdef MAME_DEBUG
/* level at which we stop emulating the decay and say the pixel is black */
double cut_level = .02;
#endif
#endif
uint8_t i, r, g, b;
/* initialize CRT palette */
/* compute the decay factor per refresh frame */
decay_1 = pow(.5, update_period / half_period_1);
decay_2 = pow(.5, update_period / half_period_2);
cur_level_1 = cur_level_2 = 255.; /* start with maximum level */
for (i=pen_crt_max_intensity; i>0; i--)
{
/* compute the current color */
r = (int) ((r1*cur_level_1 + r2*cur_level_2) + .5);
g = (int) ((g1*cur_level_1 + g2*cur_level_2) + .5);
b = (int) ((b1*cur_level_1 + b2*cur_level_2) + .5);
/* write color in palette */
palette.set_indirect_color(i, rgb_t(r, g, b));
/* apply decay for next iteration */
cur_level_1 *= decay_1;
cur_level_2 *= decay_2;
}
#if 0
#ifdef MAME_DEBUG
{
int recommended_pen_crt_num_levels;
if (decay_1 > decay_2)
recommended_pen_crt_num_levels = ceil(log(cut_level)/log(decay_1))+1;
else
recommended_pen_crt_num_levels = ceil(log(cut_level)/log(decay_2))+1;
if (recommended_pen_crt_num_levels != pen_crt_num_levels)
osd_printf_debug("File %s line %d: recommended value for pen_crt_num_levels is %d\n", __FILE__, __LINE__, recommended_pen_crt_num_levels);
}
/*if ((cur_level_1 > 255.*cut_level) || (cur_level_2 > 255.*cut_level))
osd_printf_debug("File %s line %d: Please take higher value for pen_crt_num_levels or smaller value for decay\n", __FILE__, __LINE__);*/
#endif
#endif
palette.set_indirect_color(0, rgb_t(0, 0, 0));
/* load static palette */
for ( i = 0; i < 6; i++ )
{
r = tx0_colors[i*3]; g = tx0_colors[i*3+1]; b = tx0_colors[i*3+2];
palette.set_indirect_color(pen_crt_num_levels + i, rgb_t(r, g, b));
}
/* copy colortable to palette */
for( i = 0; i < total_colors_needed; i++ )
palette.set_pen_indirect(i, i);
/* set up palette for text */
for( i = 0; i < 6; i++ )
palette.set_pen_indirect(total_colors_needed + i, tx0_pens[i]);
}
/*
TX-0
*
Raphael Nabet, 2004
*/
/* crt display timer */
enum
{
PF_RWC = 040,
PF_EOR = 020,
PF_PC = 010,
PF_EOT = 004
};
void tx0_state::machine_reset()
{
/* reset device state */
m_tape_reader.rcl = m_tape_reader.rc = 0;
}
void tx0_state::tx0_machine_stop()
{
/* the core will take care of freeing the timers, BUT we must set the variables
to nullptr if we don't want to risk confusing the tape image init function */
m_tape_reader.timer = m_tape_puncher.timer = m_typewriter.prt_timer = m_dis_timer = nullptr;
}
void tx0_state::machine_start()
{
m_tape_reader.timer = timer_alloc(FUNC(tx0_state::reader_callback), this);
m_tape_puncher.timer = timer_alloc(FUNC(tx0_state::puncher_callback), this);
m_typewriter.prt_timer = timer_alloc(FUNC(tx0_state::prt_callback), this);
m_dis_timer = timer_alloc(FUNC(tx0_state::dis_callback), this);
machine().add_notifier(MACHINE_NOTIFY_EXIT, machine_notify_delegate(&tx0_state::tx0_machine_stop,this));
}
/*
perforated tape handling
*/
class tx0_readtape_image_device : public paper_tape_reader_device
{
public:
// construction/destruction
tx0_readtape_image_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
// device_image_interface implementation
virtual const char *file_extensions() const noexcept override { return "tap,rim"; }
virtual std::pair<std::error_condition, std::string> call_load() override;
virtual void call_unload() override;
virtual const char *image_interface() const noexcept override { return "tx0_ptp"; }
protected:
// device_t implementation
virtual void device_start() override { }
private:
required_device<tx0_state> m_tx0;
};
DEFINE_DEVICE_TYPE(TX0_READTAPE, tx0_readtape_image_device, "tx0_readtape_image", "TX0 Tape Reader")
tx0_readtape_image_device::tx0_readtape_image_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: paper_tape_reader_device(mconfig, TX0_READTAPE, tag, owner, clock)
, m_tx0(*this, DEVICE_SELF_OWNER)
{
}
class tx0_punchtape_image_device : public paper_tape_punch_device
{
public:
// construction/destruction
tx0_punchtape_image_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
// device_image_interface implementation
virtual const char *file_extensions() const noexcept override { return "tap,rim"; }
virtual std::pair<std::error_condition, std::string> call_load() override;
virtual std::pair<std::error_condition, std::string> call_create(int format_type, util::option_resolution *format_options) override;
virtual void call_unload() override;
protected:
// device_t implementation
virtual void device_start() override { }
private:
required_device<tx0_state> m_tx0;
};
DEFINE_DEVICE_TYPE(TX0_PUNCHTAPE, tx0_punchtape_image_device, "tx0_punchtape_image", "TX0 Tape Puncher")
tx0_punchtape_image_device::tx0_punchtape_image_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: paper_tape_punch_device(mconfig, TX0_PUNCHTAPE, tag, owner, clock)
, m_tx0(*this, DEVICE_SELF_OWNER)
{
}
class tx0_printer_image_device : public device_t,
public device_image_interface
{
public:
// construction/destruction
tx0_printer_image_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
// device_image_interface implementation
virtual bool is_readable() const noexcept override { return false; }
virtual bool is_writeable() const noexcept override { return true; }
virtual bool is_creatable() const noexcept override { return true; }
virtual bool is_reset_on_load() const noexcept override { return false; }
virtual bool support_command_line_image_creation() const noexcept override { return true; }
virtual const char *file_extensions() const noexcept override { return "typ"; }
virtual const char *image_type_name() const noexcept override { return "printout"; }
virtual const char *image_brief_type_name() const noexcept override { return "prin"; }
virtual std::pair<std::error_condition, std::string> call_load() override;
virtual void call_unload() override;
protected:
// device_t implementation
virtual void device_start() override { }
private:
required_device<tx0_state> m_tx0;
};
DEFINE_DEVICE_TYPE(TX0_PRINTER, tx0_printer_image_device, "tx0_printer_image", "TX0 Typewriter")
tx0_printer_image_device::tx0_printer_image_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, TX0_PRINTER, tag, owner, clock)
, device_image_interface(mconfig, *this)
, m_tx0(*this, DEVICE_SELF_OWNER)
{
}
class tx0_magtape_image_device : public magtape_image_device
{
public:
// construction/destruction
tx0_magtape_image_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
// device_image_interface implementation
virtual const char *file_extensions() const noexcept override { return "tap"; }
virtual std::pair<std::error_condition, std::string> call_load() override;
virtual void call_unload() override;
protected:
// device_t implementation
virtual void device_start() override;
private:
required_device<tx0_state> m_tx0;
};
DEFINE_DEVICE_TYPE(TX0_MAGTAPE, tx0_magtape_image_device, "tx0_magtape_image", "TX0 Magnetic Tape")
tx0_magtape_image_device::tx0_magtape_image_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: magtape_image_device(mconfig, TX0_MAGTAPE, tag, owner, clock)
, m_tx0(*this, DEVICE_SELF_OWNER)
{
}
/*
Open a perforated tape image
unit 0 is reader (read-only), unit 1 is puncher (write-only)
*/
std::pair<std::error_condition, std::string> tx0_readtape_image_device::call_load()
{
if (m_tx0)
{
/* reader unit */
m_tx0->m_tape_reader.fd = this;
/* start motor */
m_tx0->m_tape_reader.motor_on = 1;
/* restart reader IO when necessary */
/* note that this function may be called before tx0_init_machine, therefore
before tape_reader.timer is allocated. It does not matter, as the clutch is never
down at power-up, but we must not call timer_enable with a nullptr parameter! */
if (m_tx0->m_tape_reader.timer)
{
if (m_tx0->m_tape_reader.motor_on && m_tx0->m_tape_reader.rcl)
{
/* delay is approximately 1/400s */
m_tx0->m_tape_reader.timer->adjust(attotime::from_usec(2500));
}
else
{
m_tx0->m_tape_reader.timer->enable(0);
}
}
}
return std::make_pair(std::error_condition(), std::string());
}
void tx0_readtape_image_device::call_unload()
{
/* reader unit */
if (m_tx0)
{
m_tx0->m_tape_reader.fd = nullptr;
/* stop motor */
m_tx0->m_tape_reader.motor_on = 0;
if (m_tx0->m_tape_reader.timer)
m_tx0->m_tape_reader.timer->enable(0);
}
}
/*
Read a byte from perforated tape
*/
int tx0_state::tape_read(uint8_t *reply)
{
if (m_tape_reader.fd && (m_tape_reader.fd->fread(reply, 1) == 1))
return 0; /* unit OK */
else
return 1; /* unit not ready */
}
/*
Write a byte to perforated tape
*/
void tx0_state::tape_write(uint8_t data)
{
if (m_tape_puncher.fd)
{
data |= 0200;
m_tape_puncher.fd->fwrite(& data, 1);
}
}
/*
common code for tape read commands (R1C, R3C, and read-in mode)
*/
void tx0_state::begin_tape_read(int binary)
{
m_tape_reader.rcl = 1;
m_tape_reader.rc = (binary) ? 1 : 3;
/* set up delay if tape is advancing */
if (m_tape_reader.motor_on && m_tape_reader.rcl)
{
/* delay is approximately 1/400s */
m_tape_reader.timer->adjust(attotime::from_usec(2500));
}
else
{
m_tape_reader.timer->enable(0);
}
}
/*
timer callback to simulate reader IO
*/
TIMER_CALLBACK_MEMBER(tx0_state::reader_callback)
{
int not_ready;
uint8_t data;
int ac;
if (m_tape_reader.rc)
{
not_ready = tape_read( & data);
if (not_ready)
{
m_tape_reader.motor_on = 0; /* let us stop the motor */
}
else
{
if (data & 0100)
{
/* read current AC */
ac = m_maincpu->state_int(TX0_AC);
/* cycle right */
ac = (ac >> 1) | ((ac & 1) << 17);
/* shuffle and insert data into AC */
ac = (ac /*& 0333333*/) | ((data & 001) << 17) | ((data & 002) << 13) | ((data & 004) << 9) | ((data & 010) << 5) | ((data & 020) << 1) | ((data & 040) >> 3);
/* write modified AC */
m_maincpu->set_state_int(TX0_AC, ac);
m_tape_reader.rc = (m_tape_reader.rc+1) & 3;
if (m_tape_reader.rc == 0)
{ /* IO complete */
m_tape_reader.rcl = 0;
m_maincpu->set_state_int(TX0_IOS,1);
}
}
}
}
if (m_tape_reader.motor_on && m_tape_reader.rcl)
/* delay is approximately 1/400s */
m_tape_reader.timer->adjust(attotime::from_usec(2500));
else
m_tape_reader.timer->enable(0);
}
/*
timer callback to generate punch completion pulse
*/
std::pair<std::error_condition, std::string> tx0_punchtape_image_device::call_load()
{
/* punch unit */
if (m_tx0)
m_tx0->m_tape_puncher.fd = this;
fseek(0, SEEK_END);
return std::make_pair(std::error_condition(), std::string());
}
std::pair<std::error_condition, std::string> tx0_punchtape_image_device::call_create(int format_type, util::option_resolution *format_options)
{
return call_load();
}
void tx0_punchtape_image_device::call_unload()
{
/* punch unit */
if (m_tx0)
m_tx0->m_tape_puncher.fd = nullptr;
}
TIMER_CALLBACK_MEMBER(tx0_state::puncher_callback)
{
m_maincpu->set_state_int(TX0_IOS,1);
}
/*
Initiate read of a 6-bit word from tape
*/
void tx0_state::tx0_io_r1l(int state)
{
begin_tape_read( 0);
}
/*
Initiate read of a 18-bit word from tape (used in read-in mode)
*/
void tx0_state::tx0_io_r3l(int state)
{
begin_tape_read(1);
}
/*
Write a 7-bit word to tape (7th bit clear)
*/
void tx0_state::tx0_io_p6h(int state)
{
int ac;
/* read current AC */
ac = m_maincpu->state_int(TX0_AC);
/* shuffle and punch 6-bit word */
tape_write(((ac & 0100000) >> 15) | ((ac & 0010000) >> 11) | ((ac & 0001000) >> 7) | ((ac & 0000100) >> 3) | ((ac & 0000010) << 1) | ((ac & 0000001) << 5));
m_tape_puncher.timer->adjust(attotime::from_usec(15800));
}
/*
Write a 7-bit word to tape (7th bit set)
*/
void tx0_state::tx0_io_p7h(int state)
{
int ac;
/* read current AC */
ac = m_maincpu->state_int(TX0_AC);
/* shuffle and punch 6-bit word */
tape_write(((ac & 0100000) >> 15) | ((ac & 0010000) >> 11) | ((ac & 0001000) >> 7) | ((ac & 0000100) >> 3) | ((ac & 0000010) << 1) | ((ac & 0000001) << 5) | 0100);
m_tape_puncher.timer->adjust(attotime::from_usec(15800));
}
/*
Typewriter handling
The alphanumeric on-line typewriter is a standard device on tx-0: it can
both handle keyboard input and print output text.
*/
/*
Open a file for typewriter output
*/
std::pair<std::error_condition, std::string> tx0_printer_image_device::call_load()
{
/* open file */
if (m_tx0)
m_tx0->m_typewriter.fd = this;
fseek(0, SEEK_END);
return std::make_pair(std::error_condition(), std::string());
}
void tx0_printer_image_device::call_unload()
{
if (m_tx0)
m_tx0->m_typewriter.fd = nullptr;
}
/*
Write a character to typewriter
*/
void tx0_state::typewriter_out(uint8_t data)
{
tx0_typewriter_drawchar(data);
if (m_typewriter.fd)
m_typewriter.fd->fwrite(&data, 1);
}
/*
timer callback to generate typewriter completion pulse
*/
TIMER_CALLBACK_MEMBER(tx0_state::prt_callback)
{
m_maincpu->io_complete();
}
/*
prt io callback
*/
void tx0_state::tx0_io_prt(int state)
{
int ac;
int ch;
/* read current AC */
ac = m_maincpu->state_int(TX0_AC);
/* shuffle and print 6-bit word */
ch = bitswap<6>(ac, 15, 12, 9, 6, 3, 0);
typewriter_out(ch);
m_typewriter.prt_timer->adjust(attotime::from_msec(100));
}
/*
timer callback to generate crt completion pulse
*/
TIMER_CALLBACK_MEMBER(tx0_state::dis_callback)
{
m_maincpu->io_complete();
}
/*
Plot one point on crt
*/
void tx0_state::tx0_io_dis(int state)
{
int ac;
int x;
int y;
ac = m_maincpu->state_int(TX0_AC);
x = ac >> 9;
y = ac & 0777;
tx0_plot(x, y);
m_dis_timer->adjust(attotime::from_usec(50));
}
/*
Magtape support
Magtape format:
7-track tape, 6-bit data, 1-bit parity
*/
void tx0_state::schedule_select()
{
attotime delay = attotime::zero;
switch (m_magtape.command)
{
case 0: /* backspace */
delay = attotime::from_usec(4600);
break;
case 1: /* read */
delay = attotime::from_usec(8600);
break;
case 2: /* rewind */
delay = attotime::from_usec(12000);
break;
case 3: /* write */
delay = attotime::from_usec(4600);
break;
}
m_magtape.timer->adjust(delay);
}
void tx0_state::schedule_unselect()
{
attotime delay = attotime::zero;
switch (m_magtape.command)
{
case 0: /* backspace */
delay = attotime::from_usec(5750);
break;
case 1: /* read */
delay = attotime::from_usec(1750);
break;
case 2: /* rewind */
delay = attotime::from_usec(0);
break;
case 3: /* write */
delay = attotime::from_usec(5750);
break;
}
m_magtape.timer->adjust(delay);
}
void tx0_magtape_image_device::device_start()
{
m_tx0->m_magtape.img = this;
}
/*
Open a magnetic tape image
*/
std::pair<std::error_condition, std::string> tx0_magtape_image_device::call_load()
{
if (m_tx0)
{
m_tx0->m_magtape.img = this;
m_tx0->m_magtape.irg_pos = tx0_state::MTIRGP_END;
/* restart IO when necessary */
/* note that this function may be called before tx0_init_machine, therefore
before magtape.timer is allocated. We must not call timer_enable with a
nullptr parameter! */
if (m_tx0->m_magtape.timer)
{
if (m_tx0->m_magtape.state == tx0_state::MTS_SELECTING)
m_tx0->schedule_select();
}
}
return std::make_pair(std::error_condition(), std::string());
}
void tx0_magtape_image_device::call_unload()
{
if (m_tx0)
{
m_tx0->m_magtape.img = nullptr;
if (m_tx0->m_magtape.timer)
{
if (m_tx0->m_magtape.state == tx0_state::MTS_SELECTING)
/* I/O has not actually started, we can cancel the selection */
m_tx0->m_tape_reader.timer->enable(0);
if ((m_tx0->m_magtape.state == tx0_state::MTS_SELECTED) || ((m_tx0->m_magtape.state == tx0_state::MTS_SELECTING) && (m_tx0->m_magtape.command == 2)))
{ /* unit has become unavailable */
m_tx0->m_magtape.state = tx0_state::MTS_UNSELECTING;
m_tx0->m_maincpu->set_state_int(TX0_PF, m_tx0->m_maincpu->state_int(TX0_PF) | PF_RWC);
m_tx0->schedule_unselect();
}
}
}
}
void tx0_state::magtape_callback()
{
uint8_t buf = 0;
int lr;
switch (m_magtape.state)
{
case MTS_UNSELECTING:
m_magtape.state = MTS_UNSELECTED;
[[fallthrough]];
case MTS_UNSELECTED:
if (m_magtape.sel_pending)
{
int mar;
mar = m_maincpu->state_int(TX0_MAR);
if ((mar & 03) != 1)
{ /* unimplemented device: remain in unselected state and set rwc
flag? */
m_maincpu->set_state_int(TX0_PF, m_maincpu->state_int(TX0_PF) | PF_RWC);
}
else
{
m_magtape.state = MTS_SELECTING;
m_magtape.command = (mar & 014 >> 2);
m_magtape.binary_flag = (mar & 020 >> 4);
if (m_magtape.img)
schedule_select();
}
m_magtape.sel_pending = false;
m_maincpu->io_complete();
}
break;
case MTS_SELECTING:
m_magtape.state = MTS_SELECTED;
switch (m_magtape.command)
{
case 0: /* backspace */
m_magtape.long_parity = 0177;
m_magtape.u.backspace_state = MTBSS_STATE0;
break;
case 1: /* read */
m_magtape.long_parity = 0177;
m_magtape.u.read.state = MTRDS_STATE0;
break;
case 2: /* rewind */
break;
case 3: /* write */
m_magtape.long_parity = 0177;
m_magtape.u.write.state = MTWTS_STATE0;
switch (m_magtape.irg_pos)
{
case MTIRGP_START:
m_magtape.u.write.counter = 150;
break;
case MTIRGP_ENDMINUS1:
m_magtape.u.write.counter = 1;
break;
case MTIRGP_END:
m_magtape.u.write.counter = 0;
break;
}
break;
}
[[fallthrough]];
case MTS_SELECTED:
switch (m_magtape.command)
{
case 0: /* backspace */
if (m_magtape.img->ftell() == 0)
{ /* tape at ldp */
m_magtape.state = MTS_UNSELECTING;
m_maincpu->set_state_int(TX0_PF, m_maincpu->state_int(TX0_PF) | PF_RWC);
schedule_unselect();
}
else if (m_magtape.img->fseek( -1, SEEK_CUR))
{ /* eject tape */
m_magtape.img->unload();
}
else if (m_magtape.img->fread(&buf, 1) != 1)
{ /* eject tape */
m_magtape.img->unload();
}
else if (m_magtape.img->fseek( -1, SEEK_CUR))
{ /* eject tape */
m_magtape.img->unload();
}
else
{
buf &= 0x7f; /* 7-bit tape, ignore 8th bit */
m_magtape.long_parity ^= buf;
switch (m_magtape.u.backspace_state)
{