diff --git a/rb70a3.inc b/rb70a3.inc
new file mode 100644
index 0000000..2a88ca2
--- /dev/null
+++ b/rb70a3.inc
@@ -0,0 +1,56 @@
+;********************************************
+;* Red Brick 70A first seen November 2016 *
+;* Blue circuit board labeled 500403-1040-02 *
+;********************************************
+
+.equ    F_CPU           = 16000000
+.equ    USE_INT0        = 1
+.equ    USE_I2C         = 0
+.equ    USE_UART        = 0
+.equ    USE_ICP         = 0
+
+;*********************
+; PORT D definitions *
+;*********************
+.equ    c_comp          = 6     ;10 i common comparator input (AIN0)
+.equ    AnFET           = 5     ;30 o
+.equ    ApFET           = 4     ;31 o
+.equ    rcp_in          = 2     ;32 i r/c pulse input
+.equ    INIT_PD         = 0
+.equ    DIR_PD          = (1<<ApFET)+(1<<AnFET)
+.equ    ApFET_port      = PORTD
+.equ    AnFET_port      = PORTD
+
+;*********************
+; PORT C definitions *
+;*********************
+.equ    mux_c           = 7     ; ADC7 voltage input (47k from Vbat, 2.0k to gnd, 10.10V in -> .402V at ADC7)
+.equ    mux_a           = 6     ; ADC6
+.equ    CpFET           = 5     ; ADC5
+.equ    CnFET           = 4     ; ADC4
+.equ    BpFET           = 3     ; ADC3
+.equ    mux_voltage     = 2     ; ADC2
+;.equ                   = 1     ; ADC1
+.equ    mux_b           = 0     ; ADC0
+.equ    BpFET_port      = PORTC
+.equ    CpFET_port      = PORTC
+.equ    CnFET_port      = PORTC
+.equ    O_POWER         = 47
+.equ    O_GROUND        = 2
+.equ    INIT_PC         = 0
+.equ    DIR_PC          = (1<<BpFET)+(1<<CpFET)+(1<<CnFET)
+
+;*********************
+; PORT B definitions *
+;*********************
+;.equ                   = 7
+;.equ                   = 6
+;.equ                   = 5     (sck stk200 interface)
+;.equ                   = 4     (miso stk200 interface)
+;.equ                   = 3     (mosi stk200 interface)
+;.equ                   = 2
+;.equ                   = 1
+.equ   BnFET            = 0
+.equ    BnFET_port      = PORTB
+.equ    INIT_PB         = 0
+.equ    DIR_PB          = (1<<BnFET)