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This commit is contained in:
R. Belmont 2013-03-09 04:18:42 +00:00
parent 06fe25c262
commit 3d797d3509
1 changed files with 31 additions and 7 deletions
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38
src/mess/machine/3c505.c
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@ -642,23 +642,47 @@ void threecom3c505_device::do_receive_command()
// m_response.data.rcv_resp.buf_ofs = htole16(0);
// m_response.data.rcv_resp.buf_seg = htole16(0);
// m_response.data.rcv_resp.buf_len = htole16(buf_len);
m_response.data.rcv_resp.pkt_len = htole16(m_rx_data_buffer.get_length());
m_response.data.rcv_resp.timeout = htole16(0); // successful completion
m_response.data.rcv_resp.status = htole16(m_rx_data_buffer.get_length() > 0 ? 0 : 0xffff);
m_response.data.rcv_resp.timetag = htole32(0); // TODO: time tag
// htole16 and friends are not portable beyond Linux. It's named differently on *BSD and differently again on OS X. Avoid!
#ifdef LSB_FIRST
m_response.data.rcv_resp.pkt_len = m_rx_data_buffer.get_length();
m_response.data.rcv_resp.timeout = 0; // successful completion
m_response.data.rcv_resp.status = m_rx_data_buffer.get_length() > 0 ? 0 : 0xffff;
m_response.data.rcv_resp.timetag = 0; // TODO: time tag
#else
UINT16 temp;
temp = m_rx_data_buffer.get_length();
m_response.data.rcv_resp.pkt_len = (temp << 8) | (temp>>8);
m_response.data.rcv_resp.timeout = 0; // successful completion
temp = m_rx_data_buffer.get_length() > 0 ? 0 : 0xffff;
m_response.data.rcv_resp.status = (temp << 8) | (temp>>8);
m_response.data.rcv_resp.timetag = 0; // TODO: time tag
#endif
// compute and check no of bytes to be DMA'ed (must be even)
UINT16 buf_len = le16toh(m_response.data.rcv_resp.buf_len) & ~1;
#ifdef LSB_FIRST
UINT16 buf_len = m_response.data.rcv_resp.buf_len & ~1;
#else
UINT16 buf_len = ((m_response.data.rcv_resp.buf_len&0xff)<<8) || ((m_response.data.rcv_resp.buf_len&0xff00)>>8) & ~1;
#endif
if (m_rx_data_buffer.get_length() > buf_len)
{
LOG1(("do_receive_command !!! buffer size too small (%d < %d)", buf_len, m_rx_data_buffer.get_length()));
m_response.data.rcv_resp.pkt_len = htole16(buf_len);
#ifdef LSB_FIRST
m_response.data.rcv_resp.pkt_len = buf_len;
#else
m_response.data.rcv_resp.pkt_len = ((buf_len & 0xff)<<8) | ((buf_len & 0xff00)>>8);
#endif
m_response.data.rcv_resp.status = 0xffff;
}
else
{
buf_len = (m_rx_data_buffer.get_length() + 1) & ~1;
m_response.data.rcv_resp.buf_len = htole16(buf_len);
#ifdef LSB_FIRST
m_response.data.rcv_resp.pkt_len = buf_len;
#else
m_response.data.rcv_resp.pkt_len = ((buf_len & 0xff)<<8) | ((buf_len & 0xff00)>>8);
#endif
}
m_response_length = m_response.length + 2;