S-Group Instruction Summary - Xerox Alto I Hardware Manual

Alto Hardware Manual
70
APPENDIX E - S-GROUP INSTRUCTION SUMMARY
Opcode Trap location Name
60000-60377 CYCLE
60400-60777 531 RAM trap
61000-61377
532
Parameterless opcodes
to
61026, ROM trap for rest
61400-61777 533 RAM trap
62000-62377 534 RAM trap
62400-62777 535 RAM trap
63000-63377 536 RAM trap
63400-63777 537 RAM trap
64000-64377 540 RAM trap
64400-64777
JSRII
65000-65377 JSRIS
65400-65777 543
RAM
trap
66000-66377 544 RAM trap
66400-66777 545 RAM trap
67000-67377 CONVERT
67400-67777 . 547 RAM trap
70000-70377
550
RAM trap
70400-70777 551 RAM trap
71000-71377 552 RAM trap
71400-71777 553 RAM trap
72000-72377 554 RAM trap
72400-72777 555 RAM trap
73000-73377 556 RAM trap
73400-73777
557
RAM trap
74000-74377 560 RAM trap
74400-74777 561 RAM trap
75000-75377 562 RAM trap
75400-75777 563 RAM trap
76000-76377 564 RAM trap
76400-76777 565 RAM trap
77000-77377 566 RAM trap
77400-77777
567
ROM trap, reserved for Swat
APPENDIX F - ALTO I / ALTO II DIFFERENCES
The minor differences between Alto I and Alto II are explained in this manual. This appendix serves as
an index of those differences:
Memory reference timing (section 2.3)
Certain emulator instructions
(RCLK, SID, SIT, VERS, DREAD,
DEXCH, DIAGNOSE1, DIAGNOSE2;
section 3.3)
Keyboard layout (section 5.1)
External device connector (section 5.4)
Memory. configuration switch (section 5.5)
Memory parity error detection (section 5.5)
2K
ROM
and 3K
RAM
options (section 8.4)
Extended memory option (section 2.3)