77.5.1.3. PDP-7

77.5.1.3. PDP-7
	77.5.1. 18-ti bitová architektura

Obrázek 77.7. PDP-7 Operate Group 1

  0   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17
+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
| 1   1   1   1 | 0 |CLA|CLL|   |SKP|           |HLT|       |OAS|CML|CMA|
+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
|                           | 0 |                   |RAR|RAL|           |
|                           | 1 |                   |RTR|RTL|           |
+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
|                               | 0 |SNL|SZA|SMA|                       |
|                               | 1 |SZL|SNA|SPA|                       |
+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+

Obrázek 77.8. PDP-7 Operate Group 2 (LAW)

  0   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17
+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
| 1   1   1   1 | 1 |                      adresa                       |
+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+

Tabulka 77.7. Přehled instrukcí PDP-7

Mnemo	Code	cycl	popis
cal Y	00	2	Call Subroutine
dac Y	04	2	Deposit AC
jms Y	10	2	Jump to subroutine
dzm Y	14	2	Deposit zero in memory.
lac Y	20	2	Load AC
xor Y	24	2	Exclusive OR: AC xor Y → AC
add Y	30	2	Add (1's complement)
tad Y	34	2	Two's complement add.
xct Y	40	1+	Execute
isz Y	44	2	Increment and skip if zero
and Y	50	2	AND
sad Y	54	2	Skip if AC and Y differ
jmp Y	60	1	Jump
	64
iot	70
opr	74
law N	76	8


77.5.1.2. PDP-4		77.5.2. 12-ti bitová rodina