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Alto Hardware Manual
APPENDIX H • PARC/SDD RESERVED MEMORY LOCATIONS
All numbers are in octal.
Location
Name
Page 0:
451
456
526
622
630-640
631-661
640-644
640-651
720-777
776-777
Page 376B:
177100
177101
177140-177157
177200-177204
177234-177237
177240-177257
177244-177247
Page 377B:
177400-177405
177400
177420
177440
177460
177600-177677
177700
Contents
Color map pointer
Mesa disaster flag
SamllTaik trap exit instruction
Tape control block list
Second Ethernet control block
Hexadecimal floating-point microcode
Trident disk control block
Third Ethernet control block
SLOT devices
Music
Summagraphics tablet X
Summagraphics tablet Y
Organ keyboard
PROM programmer
Experimental cursor control
Alto II debugger
Graphics keyboard
Maxc2 maintenance interface
!,Jto DLS input
Alto DLS output
177701
177720-177737
177764-177773
EIALOC
EIA interface output bit
EIA interface input bit
- 177776
177776
177777
TV Camera Interface
Redactron tape drive
Digital-Analog Converter -
Digital-Anslog Converter, Joystick
Digital-Analog Converter, Joystick
APPENDIX I • PARC/SDD RESERVED
8IO (8TARTF)
BITS
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit
8
Bit 9
Bit 10
Bit 11
Bit 12
Bit 13
O4OO00B
020000B
O10000B
OO4000B
oo2000B
oo1000B
000200B
000looB
000040B
ooOO20B
000010B
000004B
Maxc2 Memory Interface
Maxc2 Memory Interface
Maxc2 Memory Interface
Aurora
.
Arpanet Interface
Arpanet Interface
Tape controller
available
Trident disk interface
Trident disk interface
available
Printer interfaces (Orbit, Slot)
Bits 10-11 Second Ethernet interface
Bits 12-13 Third Ethernet interface
APPENDIX
J.
PARC/SDD TASKS
Devices
Trident Disk Controller
Orbit
Slot
Tape Controller
Audio
Aurora
Maxc2 Memory Interface
Tasks
3 and 17B
1
1
5 and 6
?
?
17B
72
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