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(MESS) okean240.c: Reduce tagmap lookups (nw)

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This commit is contained in:
Wilbert Pol 2013-02-09 12:36:51 +00:00
parent 6b0fc57095
commit 8abc4468e9
1 changed files with 25 additions and 10 deletions
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35
src/mess/drivers/okean240.c
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@ -61,7 +61,9 @@ public:
m_term_data(0),
m_j(0),
m_scroll(0),
m_p_videoram(*this, "p_videoram"){ }
m_p_videoram(*this, "p_videoram"),
m_io_modifiers(*this, "MODIFIERS")
{ }
DECLARE_READ8_MEMBER(okean240_kbd_status_r);
DECLARE_READ8_MEMBER(okean240a_kbd_status_r);
@ -76,11 +78,16 @@ public:
UINT8 m_j;
UINT8 m_scroll;
required_shared_ptr<UINT8> m_p_videoram;
virtual void machine_start();
virtual void machine_reset();
virtual void video_start();
DECLARE_DRIVER_INIT(okean240);
UINT32 screen_update_okean240(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
TIMER_CALLBACK_MEMBER(okean240_boot);
protected:
optional_ioport m_io_modifiers;
ioport_port *m_io_port[11];
};
// okean240 requires bit 4 to change
@ -95,13 +102,11 @@ READ8_MEMBER( okean240_state::okean240_kbd_status_r )
// see if a key is pressed and indicate status
READ8_MEMBER( okean240_state::okean240a_kbd_status_r )
{
char kbdrow[6];
UINT8 i,j;
for (i = 0; i < 11; i++)
{
sprintf(kbdrow,"X%X",i);
j = ioport(kbdrow)->read();
j = m_io_port[i]->read();
if (j)
return (machine().rand() & 0x10) | 2;
}
@ -130,15 +135,13 @@ READ8_MEMBER( okean240_state::okean240_keyboard_r )
READ8_MEMBER( okean240_state::okean240a_keyboard_r )
{
char kbdrow[6];
UINT8 i,j;
if (offset == 0) // port 40 (get a column)
{
for (i = 0; i < 11; i++)
{
sprintf(kbdrow,"X%X",i);
j = ioport(kbdrow)->read();
j = m_io_port[i]->read();
if (j)
{
if (j==m_j) return 0;
@ -152,14 +155,13 @@ READ8_MEMBER( okean240_state::okean240a_keyboard_r )
else
if (offset == 1) // port 41 bits 6&7 (modifier keys), and bit 1 (test rom status bit)
{
return (machine().rand() & 2) | ioport("MODIFIERS")->read();
return (machine().rand() & 2) | m_io_modifiers->read();
}
else // port 42 (get a row)
{
for (i = 0; i < 11; i++)
{
sprintf(kbdrow,"X%X",i);
if (ioport(kbdrow)->read() )
if (m_io_port[i]->read() )
return i;
}
}
@ -362,6 +364,19 @@ TIMER_CALLBACK_MEMBER(okean240_state::okean240_boot)
membank("boot")->set_entry(0);
}
void okean240_state::machine_start()
{
char kbdrow[6];
for (int i = 0; i < 11; i++)
{
sprintf(kbdrow,"X%X",i);
m_io_port[i] = ioport(kbdrow);
}
}
void okean240_state::machine_reset()
{
machine().scheduler().timer_set(attotime::from_usec(10), timer_expired_delegate(FUNC(okean240_state::okean240_boot),this));