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rc702: more WIP (nw)
This commit is contained in:
Robbbert
parent
636a2bbbf4
commit
5a856570ca
@ -7,10 +7,19 @@ Regnecentralen Piccolo RC702
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2016-09-10 Skeleton driver
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Undumped prom at IC55 type 74S287
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Keyboard has 8048 and 2758, both undumped.
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ToDo:
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- Everything
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Issues:
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- Floppy disc isn't being detected.
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(bios 1 issues)
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- Daisy chain:
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- Hitting a key causes CTC to interrupt, even though CTC and PIO are not connected.
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- After that, IRQ isn't released, causing the system to be stuck in a loop.
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****************************************************************************************************************/
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@ -64,15 +73,18 @@ public:
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DECLARE_WRITE_LINE_MEMBER(tc_w);
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DECLARE_WRITE_LINE_MEMBER(q_w);
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DECLARE_WRITE_LINE_MEMBER(qbar_w);
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DECLARE_WRITE_LINE_MEMBER(dack1_w);
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I8275_DRAW_CHARACTER_MEMBER(display_pixels);
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DECLARE_WRITE8_MEMBER(kbd_put);
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private:
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UINT8 *m_charmap;
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UINT8 *m_p_chargen;
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bool m_q_state;
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bool m_qbar_state;
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bool m_drq_state;
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UINT16 m_beepcnt;
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UINT8 m_dack;
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bool m_tc;
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required_device<palette_device> m_palette;
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required_device<cpu_device> m_maincpu;
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required_device<z80dart_device> m_sio1;
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@ -96,7 +108,7 @@ static ADDRESS_MAP_START(rc702_io, AS_IO, 8, rc702_state)
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ADDRESS_MAP_UNMAP_HIGH
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AM_RANGE(0x00, 0x01) AM_DEVREADWRITE("crtc", i8275_device, read, write)
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AM_RANGE(0x04, 0x05) AM_DEVICE("fdc", upd765a_device, map)
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AM_RANGE(0x08, 0x0b) AM_DEVREADWRITE("sio1", z80dart_device, ba_cd_r, ba_cd_w)
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AM_RANGE(0x08, 0x0b) AM_DEVREADWRITE("sio1", z80dart_device, cd_ba_r, cd_ba_w) // boot sequence doesn't program this
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AM_RANGE(0x0c, 0x0f) AM_DEVREADWRITE("ctc1", z80ctc_device, read, write)
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AM_RANGE(0x10, 0x13) AM_DEVREADWRITE("pio", z80pio_device, read, write)
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AM_RANGE(0x14, 0x17) AM_READ_PORT("DSW") AM_WRITE(port14_w) // motors
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@ -139,6 +151,11 @@ MACHINE_RESET_MEMBER( rc702_state, rc702 )
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membank("bankr0")->set_entry(0); // point at rom
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membank("bankw0")->set_entry(0); // always write to ram
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m_beepcnt = 0xffff;
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m_dack = 0;
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m_tc = 0;
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m_7474->preset_w(1);
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m_fdc->set_ready_line_connected(1); // always ready for minifloppy; controlled by fdc for 20cm
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m_fdc->set_unscaled_clock(4000000); // 4MHz for minifloppy; 8MHz for 20cm
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m_maincpu->reset();
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}
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@ -179,7 +196,26 @@ WRITE_LINE_MEMBER( rc702_state::crtc_drq_w )
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WRITE_LINE_MEMBER( rc702_state::tc_w )
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{
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m_fdc->tc_w(state);
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m_tc = state;
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if ((m_dack == 1) && m_tc)
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{
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m_dack = 0;
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m_fdc->tc_w(1);
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}
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else
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m_fdc->tc_w(0);
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}
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WRITE_LINE_MEMBER( rc702_state::dack1_w )
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{
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m_dack = 1;
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if ((m_dack == 1) && m_tc)
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{
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m_dack = 0;
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m_fdc->tc_w(1);
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}
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else
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m_fdc->tc_w(0);
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}
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WRITE8_MEMBER( rc702_state::port14_w )
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@ -200,10 +236,10 @@ WRITE8_MEMBER( rc702_state::port1c_w )
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m_beepcnt = 0x3000;
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}
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// monitor is orange even when powered off
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static const rgb_t our_palette[3] = {
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rgb_t(0x00, 0x00, 0x00), // black
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rgb_t(0xa0, 0xa0, 0xa0), // white
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rgb_t(0xff, 0xff, 0xff) // highlight
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rgb_t(0xc0, 0x60, 0x00), // off
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rgb_t(0xff, 0xb4, 0x00), // on
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};
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DRIVER_INIT_MEMBER( rc702_state, rc702 )
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@ -213,31 +249,32 @@ DRIVER_INIT_MEMBER( rc702_state, rc702 )
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membank("bankr0")->configure_entry(1, &main[0x0000]);
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membank("bankr0")->configure_entry(0, &main[0x10000]);
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membank("bankw0")->configure_entry(0, &main[0x0000]);
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m_charmap = memregion("chargen")->base();
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m_p_chargen = memregion("chargen")->base();
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m_palette->set_pen_colors(0, our_palette, ARRAY_LENGTH(our_palette));
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}
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I8275_DRAW_CHARACTER_MEMBER( rc702_state::display_pixels )
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{
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const rgb_t *palette = m_palette->palette()->entry_list_raw();
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UINT8 pixels = m_charmap[(linecount & 15) | (charcode << 4)];
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UINT8 gfx = 0;
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if (vsp)
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pixels = 0;
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if (!vsp)
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gfx = m_p_chargen[(linecount & 15) | (charcode << 4)];
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if (lten)
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pixels = 0xff;
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gfx = 0xff;
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if (rvv)
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pixels ^= 0xff;
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gfx ^= 0xff;
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bitmap.pix32(y, x++) = palette[BIT(pixels, 1) ? (hlgt ? 2 : 1) : 0];
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bitmap.pix32(y, x++) = palette[BIT(pixels, 2) ? (hlgt ? 2 : 1) : 0];
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bitmap.pix32(y, x++) = palette[BIT(pixels, 3) ? (hlgt ? 2 : 1) : 0];
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bitmap.pix32(y, x++) = palette[BIT(pixels, 4) ? (hlgt ? 2 : 1) : 0];
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bitmap.pix32(y, x++) = palette[BIT(pixels, 5) ? (hlgt ? 2 : 1) : 0];
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bitmap.pix32(y, x++) = palette[BIT(pixels, 6) ? (hlgt ? 2 : 1) : 0];
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bitmap.pix32(y, x++) = palette[BIT(pixels, 7) ? (hlgt ? 2 : 1) : 0];
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// Highlight not used
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bitmap.pix32(y, x++) = palette[BIT(gfx, 1) ? 1 : 0];
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bitmap.pix32(y, x++) = palette[BIT(gfx, 2) ? 1 : 0];
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bitmap.pix32(y, x++) = palette[BIT(gfx, 3) ? 1 : 0];
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bitmap.pix32(y, x++) = palette[BIT(gfx, 4) ? 1 : 0];
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bitmap.pix32(y, x++) = palette[BIT(gfx, 5) ? 1 : 0];
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bitmap.pix32(y, x++) = palette[BIT(gfx, 6) ? 1 : 0];
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bitmap.pix32(y, x++) = palette[BIT(gfx, 7) ? 1 : 0];
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}
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// Baud rate generator. All inputs are 0.614MHz.
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@ -259,10 +296,8 @@ WRITE_LINE_MEMBER( rc702_state::zc0_w )
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WRITE_LINE_MEMBER( rc702_state::crtc_irq_w )
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{
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m_7474->clear_w(0);
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m_ctc1->trg2(1);
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m_7474->clear_w(1);
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m_ctc1->trg2(0);
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m_7474->clear_w(!state);
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m_ctc1->trg2(state);
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}
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WRITE_LINE_MEMBER( rc702_state::busreq_w )
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@ -328,15 +363,16 @@ static MACHINE_CONFIG_START( rc702, rc702_state )
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MCFG_DEVICE_ADD("dma", AM9517A, XTAL_8MHz / 2)
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MCFG_I8237_OUT_HREQ_CB(WRITELINE(rc702_state, busreq_w))
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MCFG_I8237_OUT_EOP_CB(WRITELINE(rc702_state, tc_w))
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MCFG_I8237_OUT_EOP_CB(WRITELINE(rc702_state, tc_w)) // inverted
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MCFG_I8237_IN_MEMR_CB(READ8(rc702_state, memory_read_byte))
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MCFG_I8237_OUT_MEMW_CB(WRITE8(rc702_state, memory_write_byte))
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MCFG_I8237_IN_IOR_1_CB(DEVREAD8("fdc", upd765a_device, mdma_r))
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MCFG_I8237_OUT_IOW_1_CB(DEVWRITE8("fdc", upd765a_device, mdma_w))
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MCFG_I8237_OUT_IOW_2_CB(DEVWRITE8("crtc", i8275_device, dack_w))
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MCFG_I8237_OUT_IOW_3_CB(DEVWRITE8("crtc", i8275_device, dack_w))
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MCFG_I8237_OUT_DACK_1_CB(WRITELINE(rc702_state, dack1_w)) // inverted
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MCFG_UPD765A_ADD("fdc", true, true)
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MCFG_UPD765A_ADD("fdc", false, true)
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MCFG_UPD765_INTRQ_CALLBACK(DEVWRITELINE("ctc1", z80ctc_device, trg3))
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MCFG_UPD765_DRQ_CALLBACK(DEVWRITELINE("dma", am9517a_device, dreq1_w))
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MCFG_FLOPPY_DRIVE_ADD("fdc:0", floppies, "drive0", floppy_image_device::default_floppy_formats)
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@ -362,7 +398,7 @@ static MACHINE_CONFIG_START( rc702, rc702_state )
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MCFG_I8275_DRAW_CHARACTER_CALLBACK_OWNER(rc702_state, display_pixels)
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MCFG_I8275_IRQ_CALLBACK(WRITELINE(rc702_state, crtc_irq_w))
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MCFG_I8275_DRQ_CALLBACK(WRITELINE(rc702_state, crtc_drq_w))
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MCFG_PALETTE_ADD("palette", 3)
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MCFG_PALETTE_ADD("palette", 2)
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/* sound hardware */
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MCFG_SPEAKER_STANDARD_MONO("mono")
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@ -374,11 +410,12 @@ MACHINE_CONFIG_END
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/* ROM definition */
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ROM_START( rc702 )
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ROM_REGION( 0x10800, "maincpu", 0 )
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ROM_LOAD( "roa375.ic66", 0x10000, 0x0800, CRC(034cf9ea) SHA1(306af9fc779e3d4f51645ba04f8a99b11b5e6084) ) // rc702_boot
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ROM_REGION( 0x14000, "user1", 0 ) // not connected up yet
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ROM_LOAD( "rob357.rom", 0x0000, 0x0800, CRC(dcf84a48) SHA1(7190d3a898bcbfa212178a4d36afc32bbbc166ef) ) // rc703_boot
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ROM_LOAD( "rob358.rom", 0x0800, 0x0800, CRC(254aa89e) SHA1(5fb1eb8df1b853b931e670a2ff8d062c1bd8d6bc) ) // rc700_boot
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ROM_SYSTEM_BIOS(0, "rc700", "RC700")
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ROMX_LOAD( "rob358.rom", 0x10000, 0x0800, CRC(254aa89e) SHA1(5fb1eb8df1b853b931e670a2ff8d062c1bd8d6bc), ROM_BIOS(1))
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ROM_SYSTEM_BIOS(1, "rc702", "RC702")
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ROMX_LOAD( "roa375.ic66", 0x10000, 0x0800, CRC(034cf9ea) SHA1(306af9fc779e3d4f51645ba04f8a99b11b5e6084), ROM_BIOS(2))
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ROM_SYSTEM_BIOS(2, "rc703", "RC703")
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ROMX_LOAD( "rob357.rom", 0x10000, 0x0800, CRC(dcf84a48) SHA1(7190d3a898bcbfa212178a4d36afc32bbbc166ef), ROM_BIOS(3))
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ROM_REGION( 0x1000, "chargen", 0 )
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ROM_LOAD( "roa296.rom", 0x0000, 0x0800, CRC(7d7e4548) SHA1(efb8b1ece5f9eeca948202a6396865f26134ff2f) ) // char
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