Apex Digital Tracer, Reference Manual

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Signal Name Location
000 = CT_OUT0 (J13.5) (default)
001 = CT_OUT1 (J13.6)
010 = CT_OUT2 (J13.11)
011 = IRQ_IN0 (J12.22)
100 = IRQ_IN1 (J9.22)
101 = IRQ_IN2 (J12.8)
110 = 8255 #1 Bit C0 (J12.31)
111 = 8255 #2 Bit C0 (J9.31)
ISC[2:0] = Interrupt source C (selected IRQ driven at J9):
Signal Name Location
000 = CT_OUT0 (J13.5) (default)
001 = CT_OUT1 (J13.6)
010 = CT_OUT2 (J13.11)
011 = IRQ_IN0 (J12.22)
100 = IRQ_IN1 (J9.22)
101 = IRQ_IN2 (J12.8)
110 = 8255 #1 Bit C0 (J12.31)
111 = 8255 #2 Bit C0 (J9.31)
LED[3:0] = LED drive source.
0000 = base address decode (default) *
0001 = Counter/Timer 0 Input (CI0)
0010 = Counter/Timer 1 Input (CI1)
0011 = Counter/Timer 2 Input (CI2)
0100 = Counter/Timer 0 Output
0101 = Counter/Timer 1 Output
0110 = Counter/Timer 2 Output
0111 = Interrupt Source A (ISA) *
1000 = IRQ_IN0
1001 = IRQ_IN1
1010 = IRQ_IN2
1011 = none
1100 = Interrupt Source B (ISB) *
1101 = Interrupt Source C (ISC) *
1110 = LED off always
1111 = LED on always
* LED minimum pulse size is approximately 0.016 seconds which support
8.11 General Configuration Register Tracer Reference Manual
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