63.3.3.1. Instrukce FPP-12

63.3.3.1. Instrukce FPP-12
	63.3.3. FFP-12 Floating Point Processor

Jak již bylo zmíněno, FPP-12 je zcela samostatný procesor která má také vlastní sadu instrukcí.

Obrázek 63.19. FPP-12 Double word direct addressing

  0   1   2   3   4   5   6   7   8   9  10  11
+---+---+---+---+---+---+---+---+---+---+---+---+
|  OP CODE  | 1 | 0 | + |     X     |  ADDRESS  |
+---+---+---+---+---+---+---+---+---+---+---+---+

 12  13  14  15  16  17  18  19  20  21  22  23
+---+---+---+---+---+---+---+---+---+---+---+---+
|              A  D  D  R  E  S  S              |
+---+---+---+---+---+---+---+---+---+---+---+---+

Obrázek 63.20. FPP-12 Single-Word Addressing Format

  0   1   2   3   4   5   6   7   8   9  10  11
+---+---+---+---+---+---+---+---+---+---+---+---+
|  OP CODE  | 0 | 1 |     O  F  F  S  E  T      |
+---+---+---+---+---+---+---+---+---+---+---+---+

Tabulka 63.18. Instruction Set

kód	název	popis
0	FLDA	Load the FAC from the effective address.
1	FADD	Add the operand to the contents of FAC and store the result in the FAC.
5	FADDM	Add the operand to the contents of the FAC and store the results in the operand.
2	FSUB	Subtract the operand from the contents of the FAC and store the result in the FAC.
3	FDIV	Divide the operand into the contents of the FAC and store the results in the FAC.
4	FMUL	Multiply the contents of the FAC by the operand and store the result in the FAC.
7	FMULM	Multiply the contents of the FAC by the operand and store the result in memory.
6	FSTA	Replace the operand with the contents of the FAC.


63.3.3. FFP-12 Floating Point Processor		63.3.4. RK8 (Cartridge Disk System)