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zorba: Fix regression; document a few more things (nw)

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This commit is contained in:
AJR 2019-07-02 23:40:49 -04:00
parent 0ca3401a04
commit 2cb7842e56
1 changed files with 9 additions and 7 deletions
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16
src/mame/drivers/zorba.cpp
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@ -166,20 +166,20 @@ void zorba_state::zorba(machine_config &config)
m_dma->in_iorq_callback().set(FUNC(zorba_state::io_read_byte));
m_dma->out_iorq_callback().set(FUNC(zorba_state::io_write_byte));
I8251(config, m_uart0, 0); // U32 COM port J2
I8251(config, m_uart0, 24_MHz_XTAL / 12); // U32 COM port J2
m_uart0->txd_handler().set("rs232", FUNC(rs232_port_device::write_txd)); // TODO: this line has a LED attached
m_uart0->dtr_handler().set("rs232", FUNC(rs232_port_device::write_dtr));
m_uart0->rts_handler().set("rs232", FUNC(rs232_port_device::write_rts));
m_uart0->rxrdy_handler().set(FUNC(zorba_state::tx_rx_rdy_w<1>));
m_uart0->txrdy_handler().set(FUNC(zorba_state::tx_rx_rdy_w<0>));
I8251(config, m_uart1, 0); // U31 printer port J3
I8251(config, m_uart1, 24_MHz_XTAL / 12); // U31 printer port J3
m_uart1->txd_handler().set("serprn", FUNC(rs232_port_device::write_txd));
m_uart1->rts_handler().set("serprn", FUNC(rs232_port_device::write_rts));
m_uart1->rxrdy_handler().set(FUNC(zorba_state::tx_rx_rdy_w<3>));
m_uart1->txrdy_handler().set(FUNC(zorba_state::tx_rx_rdy_w<2>));
I8251(config, m_uart2, 0); // U30 serial keyboard J6
I8251(config, m_uart2, 24_MHz_XTAL / 12); // U30 serial keyboard J6
m_uart2->txd_handler().set("keyboard", FUNC(zorba_keyboard_device::txd_w));
m_uart2->rxrdy_handler().set(FUNC(zorba_state::tx_rx_rdy_w<5>));
m_uart2->txrdy_handler().set(FUNC(zorba_state::tx_rx_rdy_w<4>));
@ -214,8 +214,9 @@ void zorba_state::zorba(machine_config &config)
pit.out_handler<2>().append(m_uart2, FUNC(i8251_device::write_rxc));
// CRTC
I8275(config, m_crtc, 14.318'181_MHz_XTAL / 7);
I8275(config, m_crtc, 14.318'181_MHz_XTAL / 8); // TODO: character clock divider is 9 during HRTC
m_crtc->set_character_width(8);
m_crtc->set_refresh_hack(true);
m_crtc->set_display_callback(FUNC(zorba_state::zorba_update_chr), this);
m_crtc->drq_wr_callback().set(m_dma, FUNC(z80dma_device::rdy_w));
m_crtc->irq_wr_callback().set("irq0", FUNC(input_merger_device::in_w<1>));
@ -500,15 +501,16 @@ I8275_DRAW_CHARACTER_MEMBER( zorba_state::zorba_update_chr )
uint8_t gfx = m_p_chargen[(linecount & 15) + (charcode << 4) + ((gpa & 1) << 11)];
if (rvv)
gfx ^= 0xff;
// VSP actually overrides reverse video here
if (vsp)
gfx = 0;
if (lten)
gfx = 0xff;
if (rvv)
gfx ^= 0xff;
for(i=0;i<8;i++)
bitmap.pix32(y, x + 7 - i) = palette[BIT(gfx, i) ? (hlgt ? 2 : 1) : 0];
}