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From: Wilbert Pol [mailto:wilbert@jdg.info]

Browse Source 
Subject: pcshare.c


The attached patch fixes the self-test responses generated by IBM 5150  
and XT keyboards for MESS.
This commit is contained in:
Aaron Giles 2008-04-02 08:33:39 +00:00
parent bddaca5de2
commit f8c51f9a23
1 changed files with 27 additions and 7 deletions
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34
src/mame/machine/pcshare.c
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@ -506,6 +506,7 @@ void init_pc_common(UINT32 flags)
static struct {
UINT8 data;
int on;
int self_test;
} pc_keyb= { 0 };
UINT8 pc_keyb_read(void)
@ -517,8 +518,14 @@ UINT8 pc_keyb_read(void)
static TIMER_CALLBACK( pc_keyb_timer )
{
at_keyboard_reset();
pc_keyboard();
if ( pc_keyb.on ) {
pc_keyb.self_test = ( pc_keyb.self_test == 1 ) ? 2 : 0;
pc_keyboard();
} else {
/* Clock has been low for more than 5 msec, start diagnostic test */
at_keyboard_reset();
pc_keyb.self_test = 1;
}
}
@ -529,10 +536,18 @@ void pc_keyb_set_clock(int on)
if (pc_keyb.on != on)
{
if (on)
if (!on)
timer_adjust_oneshot(pc_keyboard_timer, ATTOTIME_IN_MSEC(5), 0);
else
timer_reset(pc_keyboard_timer, attotime_never);
else {
if ( pc_keyb.self_test == 1 ) {
/* The self test of the keyboard takes some time. 2 msec seems to work. */
/* This still needs to verified against a real keyboard. */
timer_adjust_oneshot(pc_keyboard_timer, ATTOTIME_IN_MSEC( 2 ), 0);
} else {
timer_reset(pc_keyboard_timer, attotime_never);
pc_keyb.self_test = 0;
}
}
pc_keyb.on = on;
}
@ -541,6 +556,7 @@ void pc_keyb_set_clock(int on)
void pc_keyb_clear(void)
{
pc_keyb.data = 0;
pic8259_set_irq_line(0, 1, 0);
}
void pc_keyboard(void)
@ -554,8 +570,12 @@ void pc_keyboard(void)
if ( (data=at_keyboard_read())!=-1) {
pc_keyb.data = data;
DBG_LOG(1,"KB_scancode",("$%02x\n", pc_keyb.data));
pic8259_set_irq_line(0, 1, 1);
pic8259_set_irq_line(0, 1, 0);
if ( ! ( data & 0x80 ) || pc_keyb.self_test == 2 ) {
pic8259_set_irq_line(0, 1, 1);
if ( pc_keyb.self_test == 2 ) {
pc_keyb.self_test = 0;
}
}
}
}
}