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format.txt
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544 microwords x 17 bits
10-bit address.
Format I:
15 14 5 4 3 2 1 0
|F C|_ _ _ _NMA_ _ _ _ _|C|T Y|0|I|
FC = Function Code Mnemonic Operation
00 n No Access
00 u Unknown Access Type
01 d Data Access
10 i Instruction Access
11 a Interrupt Acknowledge
NMA = Next Micro-ROM Address, 10 bits
TY = Type Mnemonic Source of Next Address
00 db NMA
01 a1 Address 1
10 a2 Address 2
11 a3 Address 3
I = IRC Transfer Transfer
CI Mnemonic
00 db Update neither IR nor TVN
01 dbi IRC to IR, update TVN
10 dbc IRC to IR, don't update TVN
11 dbl IRC to IR, pratially update TVN
Format II:
15 14 7 6 2 1 0
|F C|_ _ _NMBA _ _ _| CBC |1|I|
CBC = Conditional Branch Code, 5 bits
NMBA = Next Micro-ROM Base Address, 8 bits (+ 2 more bits to form an adddress)
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366 nanowords x 68 bits