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cs4031: do the previous commit a bit differently

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This commit is contained in:
Dirk Best 2013-08-01 10:11:16 +00:00
parent cc3c0b4996
commit 8857107918
2 changed files with 18 additions and 12 deletions
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29
src/mess/machine/cs4031.c
View File

@ -38,6 +38,7 @@
#define LOG_REGISTER 1
#define LOG_MEMORY 1
#define LOG_IO 1
#define LOG_KEYBOARD 0
//**************************************************************************
@ -210,7 +211,6 @@ cs4031_device::cs4031_device(const machine_config &mconfig, const char *tag, dev
m_refresh_toggle(0),
m_iochck(1),
m_nmi_mask(1),
m_sysctrl(0),
m_cpureset(0),
m_kbrst(1),
m_ext_gatea20(0),
@ -718,12 +718,15 @@ void cs4031_device::a20m()
READ8_MEMBER( cs4031_device::keyb_status_r )
{
if (LOG_KEYBOARD)
logerror("cs4031_device::keyb_status_r\n");
return m_keybc->status_r(space, 0);
}
WRITE8_MEMBER( cs4031_device::keyb_command_w )
{
if (0)
if (LOG_KEYBOARD)
logerror("cs4031_device::keyb_command_w: %02x\n", data);
m_keybc->command_w(space, 0, data);
@ -731,7 +734,7 @@ WRITE8_MEMBER( cs4031_device::keyb_command_w )
READ8_MEMBER( cs4031_device::keyb_data_r )
{
if (0)
if (LOG_KEYBOARD)
logerror("cs4031_device::keyb_data_r\n");
return m_keybc->data_r(space, 0);
@ -739,7 +742,7 @@ READ8_MEMBER( cs4031_device::keyb_data_r )
WRITE8_MEMBER( cs4031_device::keyb_data_w )
{
if (0)
if (LOG_KEYBOARD)
logerror("cs4031_device::keyb_data_w: %02x\n", data);
m_keybc->data_w(space, 0, data);
@ -747,7 +750,7 @@ WRITE8_MEMBER( cs4031_device::keyb_data_w )
WRITE_LINE_MEMBER( cs4031_device::gatea20_w )
{
if (LOG_IO)
if (LOG_KEYBOARD)
logerror("cs4031_device::gatea20_w: %u\n", state);
if (m_ext_gatea20 != state)
@ -759,7 +762,7 @@ WRITE_LINE_MEMBER( cs4031_device::gatea20_w )
WRITE_LINE_MEMBER( cs4031_device::kbrst_w )
{
if (LOG_IO)
if (LOG_KEYBOARD)
logerror("cs4031_device::kbrst_w: %u\n", state);
// active low signal
@ -786,8 +789,6 @@ WRITE8_MEMBER( cs4031_device::sysctrl_w )
if (LOG_IO)
logerror("cs4031_device::sysctrl_w: %u\n", data);
m_sysctrl = data;
m_fast_gatea20 = BIT(data, 1);
a20m();
@ -803,12 +804,18 @@ WRITE8_MEMBER( cs4031_device::sysctrl_w )
READ8_MEMBER( cs4031_device::sysctrl_r )
{
if (LOG_IO)
logerror("cs4031_device::sysctrl_r: %u\n", m_sysctrl);
UINT8 result = 0; // reserved bits read as 0?
return m_sysctrl;
result |= m_cpureset << 0;
result |= m_fast_gatea20 << 1;
if (LOG_IO)
logerror("cs4031_device::sysctrl_r: %u\n", result);
return result;
}
//**************************************************************************
// MISCELLANEOUS
//**************************************************************************

1
src/mess/machine/cs4031.h
View File

@ -240,7 +240,6 @@ private:
int m_refresh_toggle;
int m_iochck;
int m_nmi_mask;
UINT8 m_sysctrl;
// keyboard
at_keyboard_controller_device *m_keybc;