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pc8001: why was it all backwards? (nw)

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This commit is contained in:
cracyc 2014-04-28 04:11:28 +00:00
parent bb2fcfc661
commit 9fb932b6a9
2 changed files with 17 additions and 49 deletions
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58
src/mess/drivers/pc8001.c
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@ -188,7 +188,7 @@ static ADDRESS_MAP_START( pc8001_io, AS_IO, 8, pc8001_state )
AM_RANGE(0x30, 0x30) AM_MIRROR(0x0f) AM_WRITE(port30_w) AM_RANGE(0x30, 0x30) AM_MIRROR(0x0f) AM_WRITE(port30_w)
AM_RANGE(0x40, 0x40) AM_MIRROR(0x0f) AM_READWRITE(port40_r, port40_w) AM_RANGE(0x40, 0x40) AM_MIRROR(0x0f) AM_READWRITE(port40_r, port40_w)
AM_RANGE(0x50, 0x51) AM_DEVREADWRITE(UPD3301_TAG, upd3301_device, read, write) AM_RANGE(0x50, 0x51) AM_DEVREADWRITE(UPD3301_TAG, upd3301_device, read, write)
AM_RANGE(0x60, 0x68) AM_DEVREADWRITE(I8257_TAG, i8257_device, i8257_r, i8257_w) AM_RANGE(0x60, 0x68) AM_DEVREADWRITE(I8257_TAG, i8257n_device, read, write)
// AM_RANGE(0x70, 0x7f) unused // AM_RANGE(0x70, 0x7f) unused
// AM_RANGE(0x80, 0x80) AM_MIRROR(0x0f) AM_WRITE(pc8011_ext0_w) // AM_RANGE(0x80, 0x80) AM_MIRROR(0x0f) AM_WRITE(pc8011_ext0_w)
// AM_RANGE(0x90, 0x90) AM_MIRROR(0x0f) AM_WRITE(pc8011_ext1_w) // AM_RANGE(0x90, 0x90) AM_MIRROR(0x0f) AM_WRITE(pc8011_ext1_w)
@ -407,32 +407,16 @@ WRITE_LINE_MEMBER( pc8001_state::hrq_w )
m_maincpu->set_input_line(INPUT_LINE_HALT, state); m_maincpu->set_input_line(INPUT_LINE_HALT, state);
/* HACK - this should be connected to the BUSACK line of Z80 */ /* HACK - this should be connected to the BUSACK line of Z80 */
m_dma->i8257_hlda_w(state); m_dma->hlda_w(state);
} }
WRITE8_MEMBER( pc8001_state::dma_mem_w ) READ8_MEMBER( pc8001_state::dma_mem_r )
{
//if (channel == 2)
{
m_crtc->dack_w(space, offset, data);
}
}
READ8_MEMBER( pc8001_state::dma_io_r )
{ {
address_space &program = m_maincpu->space(AS_PROGRAM); address_space &program = m_maincpu->space(AS_PROGRAM);
return program.read_byte(offset); return program.read_byte(offset);
} }
WRITE8_MEMBER( pc8001_state::dma_io_w )
{
address_space &program = m_maincpu->space(AS_PROGRAM);
program.write_byte(offset, data);
}
/* Machine Initialization */ /* Machine Initialization */
void pc8001_state::machine_start() void pc8001_state::machine_start()
@ -444,7 +428,7 @@ void pc8001_state::machine_start()
m_rtc->oe_w(1); m_rtc->oe_w(1);
/* initialize DMA */ /* initialize DMA */
m_dma->i8257_ready_w(1); m_dma->ready_w(1);
/* setup memory banking */ /* setup memory banking */
UINT8 *ram = m_ram->pointer(); UINT8 *ram = m_ram->pointer();
@ -524,24 +508,17 @@ static MACHINE_CONFIG_START( pc8001, pc8001_state )
MCFG_DEVICE_ADD(I8255A_TAG, I8255A, 0) MCFG_DEVICE_ADD(I8255A_TAG, I8255A, 0)
MCFG_DEVICE_ADD(I8257_TAG, I8257, 4000000) MCFG_DEVICE_ADD(I8257_TAG, I8257N, 4000000)
MCFG_I8257_OUT_HRQ_CB(WRITELINE(pc8001_state, hrq_w)) MCFG_I8257N_OUT_HRQ_CB(WRITELINE(pc8001_state, hrq_w))
MCFG_I8257_OUT_MEMW_CB(WRITE8(pc8001_state, dma_mem_w)) MCFG_I8257N_IN_MEMR_CB(READ8(pc8001_state, dma_mem_r))
MCFG_I8257_IN_IOR_0_CB(READ8(pc8001_state, dma_io_r)) MCFG_I8257N_OUT_IOW_2_CB(DEVWRITE8(UPD3301_TAG, upd3301_device, dack_w))
MCFG_I8257_IN_IOR_1_CB(READ8(pc8001_state, dma_io_r))
MCFG_I8257_IN_IOR_2_CB(READ8(pc8001_state, dma_io_r))
MCFG_I8257_IN_IOR_3_CB(READ8(pc8001_state, dma_io_r))
MCFG_I8257_OUT_IOW_0_CB(WRITE8(pc8001_state, dma_io_w))
MCFG_I8257_OUT_IOW_1_CB(WRITE8(pc8001_state, dma_io_w))
MCFG_I8257_OUT_IOW_2_CB(WRITE8(pc8001_state, dma_io_w))
MCFG_I8257_OUT_IOW_3_CB(WRITE8(pc8001_state, dma_io_w))
MCFG_UPD1990A_ADD(UPD1990A_TAG, XTAL_32_768kHz, NULL, NULL) MCFG_UPD1990A_ADD(UPD1990A_TAG, XTAL_32_768kHz, NULL, NULL)
MCFG_DEVICE_ADD(UPD3301_TAG, UPD3301, 14318180) MCFG_DEVICE_ADD(UPD3301_TAG, UPD3301, 14318180)
MCFG_UPD3301_CHARACTER_WIDTH(8) MCFG_UPD3301_CHARACTER_WIDTH(8)
MCFG_UPD3301_DRAW_CHARACTER_CALLBACK_OWNER(pc8001_state, pc8001_display_pixels) MCFG_UPD3301_DRAW_CHARACTER_CALLBACK_OWNER(pc8001_state, pc8001_display_pixels)
MCFG_UPD3301_VRTC_CALLBACK(DEVWRITELINE(I8257_TAG, i8257_device, i8257_drq2_w)) MCFG_UPD3301_VRTC_CALLBACK(DEVWRITELINE(I8257_TAG, i8257n_device, dreq2_w))
MCFG_CENTRONICS_ADD(CENTRONICS_TAG, centronics_printers, "printer") MCFG_CENTRONICS_ADD(CENTRONICS_TAG, centronics_printers, "printer")
MCFG_CENTRONICS_ACK_HANDLER(WRITELINE(pc8001_state, write_centronics_ack)) MCFG_CENTRONICS_ACK_HANDLER(WRITELINE(pc8001_state, write_centronics_ack))
@ -580,24 +557,17 @@ static MACHINE_CONFIG_START( pc8001mk2, pc8001mk2_state )
MCFG_DEVICE_ADD(I8255A_TAG, I8255A, 0) MCFG_DEVICE_ADD(I8255A_TAG, I8255A, 0)
MCFG_DEVICE_ADD(I8257_TAG, I8257, 4000000) MCFG_DEVICE_ADD(I8257_TAG, I8257N, 4000000)
MCFG_I8257_OUT_HRQ_CB(WRITELINE(pc8001_state, hrq_w)) MCFG_I8257N_OUT_HRQ_CB(WRITELINE(pc8001_state, hrq_w))
MCFG_I8257_OUT_MEMW_CB(WRITE8(pc8001_state, dma_mem_w)) MCFG_I8257N_IN_MEMR_CB(READ8(pc8001_state, dma_mem_r))
MCFG_I8257_IN_IOR_0_CB(READ8(pc8001_state, dma_io_r)) MCFG_I8257N_OUT_IOW_2_CB(DEVWRITE8(UPD3301_TAG, upd3301_device, dack_w))
MCFG_I8257_IN_IOR_1_CB(READ8(pc8001_state, dma_io_r))
MCFG_I8257_IN_IOR_2_CB(READ8(pc8001_state, dma_io_r))
MCFG_I8257_IN_IOR_3_CB(READ8(pc8001_state, dma_io_r))
MCFG_I8257_OUT_IOW_0_CB(WRITE8(pc8001_state, dma_io_w))
MCFG_I8257_OUT_IOW_1_CB(WRITE8(pc8001_state, dma_io_w))
MCFG_I8257_OUT_IOW_2_CB(WRITE8(pc8001_state, dma_io_w))
MCFG_I8257_OUT_IOW_3_CB(WRITE8(pc8001_state, dma_io_w))
MCFG_UPD1990A_ADD(UPD1990A_TAG, XTAL_32_768kHz, NULL, NULL) MCFG_UPD1990A_ADD(UPD1990A_TAG, XTAL_32_768kHz, NULL, NULL)
MCFG_DEVICE_ADD(UPD3301_TAG, UPD3301, 14318180) MCFG_DEVICE_ADD(UPD3301_TAG, UPD3301, 14318180)
MCFG_UPD3301_CHARACTER_WIDTH(8) MCFG_UPD3301_CHARACTER_WIDTH(8)
MCFG_UPD3301_DRAW_CHARACTER_CALLBACK_OWNER(pc8001_state, pc8001_display_pixels) MCFG_UPD3301_DRAW_CHARACTER_CALLBACK_OWNER(pc8001_state, pc8001_display_pixels)
MCFG_UPD3301_VRTC_CALLBACK(DEVWRITELINE(I8257_TAG, i8257_device, i8257_drq2_w)) MCFG_UPD3301_VRTC_CALLBACK(DEVWRITELINE(I8257_TAG, i8257n_device, dreq2_w))
MCFG_CENTRONICS_ADD(CENTRONICS_TAG, centronics_printers, "printer") MCFG_CENTRONICS_ADD(CENTRONICS_TAG, centronics_printers, "printer")

8
src/mess/includes/pc8001.h
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@ -11,7 +11,7 @@
#include "imagedev/cassette.h" #include "imagedev/cassette.h"
#include "machine/buffer.h" #include "machine/buffer.h"
#include "bus/centronics/ctronics.h" #include "bus/centronics/ctronics.h"
#include "machine/8257dma.h" #include "machine/i8257.h"
#include "machine/i8255.h" #include "machine/i8255.h"
#include "machine/i8251.h" #include "machine/i8251.h"
#include "machine/ram.h" #include "machine/ram.h"
@ -48,7 +48,7 @@ public:
required_device<cpu_device> m_maincpu; required_device<cpu_device> m_maincpu;
required_device<upd1990a_device> m_rtc; required_device<upd1990a_device> m_rtc;
required_device<i8257_device> m_dma; required_device<i8257n_device> m_dma;
required_device<upd3301_device> m_crtc; required_device<upd3301_device> m_crtc;
required_device<cassette_image_device> m_cassette; required_device<cassette_image_device> m_cassette;
required_device<centronics_device> m_centronics; required_device<centronics_device> m_centronics;
@ -66,9 +66,7 @@ public:
DECLARE_WRITE8_MEMBER( port40_w ); DECLARE_WRITE8_MEMBER( port40_w );
DECLARE_WRITE_LINE_MEMBER( crtc_drq_w ); DECLARE_WRITE_LINE_MEMBER( crtc_drq_w );
DECLARE_WRITE_LINE_MEMBER( hrq_w ); DECLARE_WRITE_LINE_MEMBER( hrq_w );
DECLARE_WRITE8_MEMBER( dma_mem_w ); DECLARE_READ8_MEMBER( dma_mem_r );
DECLARE_READ8_MEMBER( dma_io_r );
DECLARE_WRITE8_MEMBER( dma_io_w );
/* video state */ /* video state */
int m_width80; int m_width80;