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attache: switched around the RTC read and write operations, now the CMOS and RTC play nice with each other, although the date/time still cannot be set. (no whatsnew)

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mahlemiut 2013-06-14 04:46:28 +00:00
parent 91d3679d13
commit c37de741f1
1 changed files with 8 additions and 6 deletions
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14
src/mess/drivers/attache.c
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@ -111,8 +111,8 @@ public:
{
PIO_SEL_8910_ADDR = 0,
PIO_SEL_8910_DATA,
PIO_SEL_5832_WRITE,
PIO_SEL_5832_READ,
PIO_SEL_5832_WRITE,
PIO_SEL_5101_WRITE,
PIO_SEL_5101_READ,
PIO_SEL_LATCH,
@ -510,7 +510,7 @@ void attache_state::operation_strobe(address_space& space, UINT8 data)
break;
case PIO_SEL_5832_READ:
m_rtc->cs_w(1);
m_rtc->write_w(1);
m_rtc->write_w(0);
m_rtc->read_w(0);
m_rtc->address_w((data & 0xf0) >> 4);
logerror("RTC: write %01x to %01x (read)\n",data & 0x0f,(data & 0xf0) >> 4);
@ -561,8 +561,8 @@ WRITE8_MEMBER(attache_state::pio_portB_w)
// B2-4 = OPERATION SELECT
// 0 = 8910 ADDR LOAD
// 1 = 8910 DATA LOAD
// 2 = 5832 WRITE
// 3 = 5832 READ
// 2 = 5832 WRITE -- the CP/M BIOS dumped from an actual disc seems to switch the RTC operations around
// 3 = 5832 READ this differs from the BIOS source listings available for both CP/M 2.2.3 and 2.2.5
// 4 = 5101 WRITE
// 5 = 5101 READ
// 6 = LATCH LOAD
@ -570,10 +570,12 @@ WRITE8_MEMBER(attache_state::pio_portB_w)
//B5 = /'138 OPERATION STROBE
//B6 = /KEYBOARD DATA IN
//B7 = /KEYBOARD CLOCK OUT
m_pio_select = (data & 0x1c) >> 2;
m_cmos_select = ((data & 0x03) << 4) | (m_cmos_select & 0x0f);
if((data & 0x20) && !(m_pio_portb & 0x20))
if(!(data & 0x20) && (m_pio_portb & 0x20))
{
m_pio_select = (data & 0x1c) >> 2;
operation_strobe(space,m_pio_porta);
}
m_pio_portb = data;
keyboard_clock_w(data & 0x80);
}