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m20: fix 2.0 bioses booting, requires image with nonempty first sector (nw)

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cracyc 2015-06-29 17:57:57 -05:00
parent d3b07cb9e8
commit 12505514ec
1 changed files with 3 additions and 0 deletions
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3
src/mess/drivers/m20.c
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@ -755,6 +755,9 @@ void m20_state::machine_reset()
else else
m_port21 = 0xff; m_port21 = 0xff;
if(system_bios() > 0) // bits have different meanings?
m_port21 &= ~8;
m_fd1797->reset(); m_fd1797->reset();
memcpy(RAM, ROM, 8); // we need only the reset vector memcpy(RAM, ROM, 8); // we need only the reset vector