Motorola MVME172 Programmer's Reference Manual page 184

VMEchip2
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SIG0 The SIG0 bit is set when a VMEbus master writes a one
to it. When the SIG0 bit is set, an interrupt is sent to the
local bus interrupter. The SIG0 bit is cleared when the
local processor writes a one to the SIG0 bit in this register
or the CSIG0 bit in the local interrupt clear register.
SIG1 The SIG1 bit is set when a VMEbus master writes a one
to it. When the SIG1 bit is set, an interrupt is sent to the
local bus interrupter. The SIG1 bit is cleared when the
local processor writes a one to the SIG1 bit in this register
or the CSIG1 bit in the local interrupt clear register.
SIG2 The SIG2 bit is set when a VMEbus master writes a one
to it. When the SIG2 bit is set, an interrupt is sent to the
local bus interrupter. The SIG2 bit is cleared when the
local processor writes a one to the SIG2 bit in this register
or the CSIG2 bit in the local interrupt clear register.
SIG3 The SIG3 bit is set when a VMEbus master writes a one
to it. When the SIG3 bit is set, an interrupt is sent to the
local bus interrupter. The SIG3 bit is cleared when the
local processor writes a one to the SIG3 bit in this register
or the CSIG3 bit in the local interrupt clear register.
LM0 This bit is cleared by an LM0 cycle on the VMEbus.
When this bit is cleared, an interrupt is set to the local bus
interrupter. This bit is set when the local processor or a
VMEbus master writes a one to the LM0 bit in this
register or the CLM0 bit in local interrupt clear register.
LM1 This bit is cleared by an LM1 cycle on the VMEbus.
When this bit is cleared, an interrupt is set to the local bus
interrupter. This bit is set when the local processor or a
VMEbus master writes a one to the LM1 bit in this
register or the CLM1 bit in local interrupt clear register.
LM2 This bit is cleared by an LM2 cycle on the VMEbus. This
bit is set when the local processor or a VMEbus master
writes a one to the LM0 bit in this register.
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