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serproc bit 6 switches between cassette and rs423. (nw)

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This commit is contained in:
Wilbert Pol 2013-04-26 18:42:24 +00:00
parent 4f30e2928a
commit 9354274c3b
2 changed files with 19 additions and 19 deletions
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14
src/mess/includes/bbc.h
View File

@ -161,10 +161,10 @@ public:
int m_len3;
int m_mc6850_clock;
UINT8 m_serproc_data;
int m_dcd;
int m_rxd;
int m_txd;
int m_cts;
int m_dcd_cass;
int m_rxd_cass;
int m_rxd_rs423;
int m_cts_rs423;
UINT32 m_nr_high_tones;
emu_timer *m_tape_timer;
@ -327,9 +327,9 @@ public:
DECLARE_WRITE_LINE_MEMBER(bbc_wd177x_intrq_w);
DECLARE_WRITE_LINE_MEMBER(bbc_wd177x_drq_w);
DECLARE_WRITE_LINE_MEMBER(bbc_vsync);
DECLARE_READ_LINE_MEMBER(bbc_rxd_r) { return m_rxd; }
DECLARE_READ_LINE_MEMBER(bbc_dcd_r) { return m_dcd; }
DECLARE_READ_LINE_MEMBER(bbc_cts_r) { return m_cts; }
DECLARE_READ_LINE_MEMBER(bbc_rxd_r) { return ( m_serproc_data & 0x40 ) ? m_rxd_rs423 : m_rxd_cass; }
DECLARE_READ_LINE_MEMBER(bbc_dcd_r) { return ( m_serproc_data & 0x40 ) ? 0 : m_dcd_cass; }
DECLARE_READ_LINE_MEMBER(bbc_cts_r) { return ( m_serproc_data & 0x40 ) ? m_cts_rs423 : 1; }
DECLARE_DEVICE_IMAGE_LOAD_MEMBER( bbcb_cart );

24
src/mess/machine/bbc.c
View File

@ -1292,7 +1292,7 @@ const uPD7002_interface bbc_uPD7002 =
void bbc_state::MC6850_Receive_Clock(int new_clock)
{
m_rxd = new_clock;
m_rxd_cass = new_clock;
//
// Somehow the "serial processor" generates 16 clock signals towards
@ -1317,7 +1317,7 @@ TIMER_CALLBACK_MEMBER(bbc_state::bbc_tape_timer_cb)
//this is to long to recive anything so reset the serial IC. This is a hack, this should be done as a timer in the MC6850 code.
logerror ("Cassette length %d\n",m_wav_len);
m_nr_high_tones = 0;
m_dcd = 0;
m_dcd_cass = 0;
m_len0=0;
m_len1=0;
m_len2=0;
@ -1339,7 +1339,7 @@ TIMER_CALLBACK_MEMBER(bbc_state::bbc_tape_timer_cb)
/* Clock a 0 onto the serial line */
logerror("Serial value 0\n");
m_nr_high_tones = 0;
m_dcd = 0;
m_dcd_cass = 0;
MC6850_Receive_Clock(0);
m_len0=0;
m_len1=0;
@ -1354,7 +1354,7 @@ TIMER_CALLBACK_MEMBER(bbc_state::bbc_tape_timer_cb)
m_nr_high_tones++;
if ( m_nr_high_tones > 100 )
{
m_dcd = 1;
m_dcd_cass = 1;
}
MC6850_Receive_Clock(1);
m_len0=0;
@ -1987,10 +1987,10 @@ DEVICE_IMAGE_LOAD_MEMBER( bbc_state, bbcb_cart )
DRIVER_INIT_MEMBER(bbc_state,bbc)
{
m_Master=0;
m_rxd = 0;
m_dcd = 0;
m_txd = 0;
m_cts = 1;
m_rxd_cass = 0;
m_rxd_rs423 = 0;
m_dcd_cass = 0;
m_cts_rs423 = 1;
m_nr_high_tones = 0;
m_serproc_data = 0;
m_tape_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(bbc_state::bbc_tape_timer_cb),this));
@ -1999,10 +1999,10 @@ DRIVER_INIT_MEMBER(bbc_state,bbc)
DRIVER_INIT_MEMBER(bbc_state,bbcm)
{
m_Master=1;
m_rxd = 0;
m_dcd = 0;
m_txd = 0;
m_cts = 1;
m_rxd_cass = 0;
m_rxd_rs423 = 0;
m_dcd_cass = 0;
m_cts_rs423 = 1;
m_nr_high_tones = 0;
m_serproc_data = 0;
m_tape_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(bbc_state::bbc_tape_timer_cb),this));