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Minor changes to AT29x and logging.

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This commit is contained in:
Michael Zapf 2015-08-22 14:35:57 +02:00
parent 5072c4d0bd
commit 44a87f8d29
2 changed files with 19 additions and 24 deletions
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6
src/emu/bus/ti99x/genboard.c
View File

@ -1322,21 +1322,21 @@ WRITE_LINE_MEMBER( geneve_mapper_device::pfm_select_lsb )
{ {
if (state==ASSERT_LINE) m_pfm_bank |= 1; if (state==ASSERT_LINE) m_pfm_bank |= 1;
else m_pfm_bank &= 0xfe; else m_pfm_bank &= 0xfe;
logerror("%s: Setting bank (l) = %d\n", tag(), m_pfm_bank); if (TRACE_PFM) logerror("%s: Setting bank (l) = %d\n", tag(), m_pfm_bank);
} }
WRITE_LINE_MEMBER( geneve_mapper_device::pfm_select_msb ) WRITE_LINE_MEMBER( geneve_mapper_device::pfm_select_msb )
{ {
if (state==ASSERT_LINE) m_pfm_bank |= 2; if (state==ASSERT_LINE) m_pfm_bank |= 2;
else m_pfm_bank &= 0xfd; else m_pfm_bank &= 0xfd;
logerror("%s: Setting bank (u) = %d\n", tag(), m_pfm_bank); if (TRACE_PFM) logerror("%s: Setting bank (u) = %d\n", tag(), m_pfm_bank);
} }
WRITE_LINE_MEMBER( geneve_mapper_device::pfm_output_enable ) WRITE_LINE_MEMBER( geneve_mapper_device::pfm_output_enable )
{ {
// Negative logic // Negative logic
m_pfm_output_enable = (state==CLEAR_LINE); m_pfm_output_enable = (state==CLEAR_LINE);
logerror("%s: PFM output %s\n", tag(), m_pfm_output_enable? "enable" : "disable"); if (TRACE_PFM) logerror("%s: PFM output %s\n", tag(), m_pfm_output_enable? "enable" : "disable");
} }
//==================================================================== //====================================================================

37
src/emu/machine/at29x.c
View File

@ -221,28 +221,23 @@ READ8_MEMBER( at29x_device::read )
if (m_id_mode) if (m_id_mode)
{ {
switch (offset) // Experiments showed that the manufacturer code and device code
// are returned for every address 0 and 1 modulo sector_size.
//
if ((offset % m_sector_size)==0) reply = 0x1f; // Manufacturer code
else
{ {
case 0x00000: if ((offset % m_sector_size)==1) reply = m_device_id; // Device code
reply = 0x1f; // Manufacturer code else
break; {
// Boot block lockout detection [1]
case 0x00001: if (offset == 0x00002) reply = m_lower_bbl? 0xff : 0xfe;
reply = m_device_id; // Device code else
break; {
if (offset == 0x7fff2) reply = m_higher_bbl? 0xff : 0xfe;
// Boot block lockout detection [1] else reply = 0;
case 0x00002: }
reply = m_lower_bbl? 0xff : 0xfe; }
break;
case 0x7fff2:
reply = m_higher_bbl? 0xff : 0xfe;
break;
default:
reply = 0;
break;
} }
} }
else if ((m_pgm == PGM_2) || (m_pgm == PGM_3)) else if ((m_pgm == PGM_2) || (m_pgm == PGM_3))