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(MESS) ti99: Fixed dropouts in RS232, caused by sdlsocket/corefile

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wiping the input buffer on next write.
This commit is contained in:
Michael Zapf 2013-08-25 15:22:30 +00:00
parent af2b8f15ba
commit 784a36b87f
2 changed files with 33 additions and 4 deletions
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23
src/mess/machine/ti99/ti_rs232.c
View File

@ -684,7 +684,6 @@ void ti_rs232_pio_device::receive_data_or_line_state(int uartind)
{
device_image_interface *serial;
UINT8 buffer;
int len = 0;
serial = dynamic_cast<device_image_interface *>(m_serdev[uartind]);
@ -700,8 +699,15 @@ void ti_rs232_pio_device::receive_data_or_line_state(int uartind)
// elapsed, we can get a new value.
if (m_time_hold[uartind] > 1.0)
{
len = serial->fread(&buffer, 1);
if (len==0) return;
// Buffer empty?
if (m_bufpos[uartind] == m_buflen[uartind])
{
// Get all out of sdlsocket
m_buflen[uartind] = serial->fread(m_recvbuf[uartind], 512);
m_bufpos[uartind] = 0;
if (m_buflen[uartind]==0) return;
}
buffer = m_recvbuf[uartind][m_bufpos[uartind]++];
}
else
{
@ -1030,6 +1036,15 @@ void ti_rs232_pio_device::device_start()
m_serdev[0] = subdevice<ti_rs232_attached_device>("serdev0");
m_serdev[1] = subdevice<ti_rs232_attached_device>("serdev1");
m_piodev = subdevice<ti_pio_attached_device>("piodev");
// Prepare the receive buffers
m_recvbuf[0] = (UINT8*)malloc(512);
m_recvbuf[1] = (UINT8*)malloc(512);
}
void ti_rs232_pio_device::device_stop()
{
if (m_recvbuf[0] != NULL) free(m_recvbuf[0]);
if (m_recvbuf[1] != NULL) free(m_recvbuf[1]);
}
void ti_rs232_pio_device::device_reset()
@ -1047,6 +1062,8 @@ void ti_rs232_pio_device::device_reset()
m_recv_mode[0] = RECV_MODE_NORMAL;
m_recv_mode[1] = RECV_MODE_NORMAL;
m_bufpos[0] = m_bufpos[1] = m_buflen[0] = m_buflen[1] = 0;
if (m_genmod)
{
m_select_mask = 0x1fe000;

14
src/mess/machine/ti99/ti_rs232.h
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@ -49,6 +49,7 @@ public:
protected:
virtual void device_start(void);
virtual void device_reset(void);
virtual void device_stop(void);
virtual const rom_entry *device_rom_region(void) const;
virtual machine_config_constructor device_mconfig_additions() const;
virtual ioport_constructor device_input_ports() const;
@ -66,13 +67,24 @@ private:
void output_exception(int uartind, int param, UINT8 value);
void ctrl_callback(int uartind, int type, UINT8 data);
// UART chips
tms9902_device* m_uart[2];
// Connected images (file or socket connection) that represent the
// devices that are connected to the serial adapters
ti_rs232_attached_device* m_serdev[2];
// Connected image (file) that represents the device connected to the
// parallel interface
ti_pio_attached_device* m_piodev;
address_space* m_space;
UINT8* m_dsrrom;
UINT8 m_signals[2]; // Latches the state of the output lines for UART0/UART1
// Input buffer for each UART. We have to copy the contents of sdlsocket here
// because the buffer in corefile will be lost on the next write operation
UINT8* m_recvbuf[2];
int m_bufpos[2], m_buflen[2];
// Latches the state of the output lines for UART0/UART1
UINT8 m_signals[2];
int m_recv_mode[2]; // May be NORMAL or ESC
// Baud rate management