Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-05-05 22:04:43 +03:00
Code Issues Actions 4 Packages Projects Releases Wiki Activity

(MESS) Uses the IO line from the SASI bus to determine the direction of the SASI data port. This seems the most likely way the hardware works. [smf]

Browse Source
This commit is contained in:
smf- 2012-10-07 23:07:44 +00:00
parent 95dcf93a69
commit c683bc7181
2 changed files with 30 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
src/mess/drivers/v1050.c
View File

@ -345,6 +345,28 @@ WRITE8_MEMBER( v1050_state::dvint_clr_w )
m_subcpu->set_input_line(INPUT_LINE_IRQ0, CLEAR_LINE);
}
WRITE8_MEMBER( v1050_state::sasi_data_w )
{
data_out = data;
if( m_sasibus->scsi_io_r() != 0 )
{
m_sasibus->scsi_data_w( data );
}
}
WRITE_LINE_MEMBER( v1050_state::sasi_io_w )
{
if( state != 0 )
{
m_sasibus->scsi_data_w( data_out );
}
else
{
m_sasibus->scsi_data_w( 0xff );
}
}
READ8_MEMBER( v1050_state::sasi_status_r )
{
/*
@ -447,7 +469,7 @@ static ADDRESS_MAP_START( v1050_io, AS_IO, 8, v1050_state )
AM_RANGE(0xb0, 0xb0) AM_READWRITE(dint_clr_r, dint_clr_w)
AM_RANGE(0xc0, 0xc0) AM_WRITE(v1050_i8214_w)
AM_RANGE(0xd0, 0xd0) AM_WRITE(bank_w)
AM_RANGE(0xe0, 0xe0) AM_DEVREADWRITE(SASIBUS_TAG ":host", scsicb_device, scsi_data_r, scsi_data_w)
AM_RANGE(0xe0, 0xe0) AM_WRITE(sasi_data_w) AM_DEVREAD(SASIBUS_TAG ":host", scsicb_device, scsi_data_r)
AM_RANGE(0xe1, 0xe1) AM_READWRITE(sasi_status_r, sasi_ctrl_w)
ADDRESS_MAP_END
@ -989,7 +1011,7 @@ static const SCSICB_interface sasi_intf =
DEVCB_NULL,
DEVCB_NULL,
DEVCB_NULL,
DEVCB_NULL,
DEVCB_DRIVER_LINE_MEMBER(v1050_state, sasi_io_w),
DEVCB_NULL,
DEVCB_NULL,
DEVCB_NULL,

6
src/mess/includes/v1050.h
View File

@ -128,6 +128,8 @@ public:
DECLARE_READ8_MEMBER( videoram_r );
DECLARE_WRITE8_MEMBER( videoram_w );
DECLARE_WRITE_LINE_MEMBER( crtc_vs_w );
DECLARE_WRITE8_MEMBER(sasi_data_w);
DECLARE_WRITE_LINE_MEMBER(sasi_io_w);
DECLARE_READ8_MEMBER( sasi_status_r );
DECLARE_WRITE8_MEMBER( sasi_ctrl_w );
@ -157,6 +159,10 @@ public:
required_shared_ptr<UINT8> m_video_ram; // video RAM
UINT8 *m_attr_ram; // attribute RAM
UINT8 m_attr; // attribute latch
// sasi state
UINT8 data_out;
TIMER_DEVICE_CALLBACK_MEMBER(v1050_keyboard_tick);
TIMER_DEVICE_CALLBACK_MEMBER(sasi_ack_tick);
TIMER_DEVICE_CALLBACK_MEMBER(sasi_rst_tick);