NorthStar HORIZON Random Access Memory Operation & User’s Manual

57, HRAM USER/TECHNICAL MANUAL HRAM INTERFACE SIGNALS APPENDIX B Type of Signal Signal Name Description Address A15-AO 16 bits of address from the processor D17-DIO 8 bits of data to the processor Data D07-D00 8 bits of data from the processor SMEMR True on…

58, HRAM USER/TECHNICAL MANUAL HRAM B-1 User/Technical Manual Type of Signal Signal Name Description PHASE 2 Clock from processor POC True when processor is being reset due to power on clear logic or the rear panel reset switch. Miscellaneous PHANTOM Not used in a standard H…

30, HRAM USER/TECHNICAL MANUAL Each of the switches in S1 corresponds to one 8K section of the address space. The last 8K section is further divided into 1K sections by the switches in S2. For addresses OOOOH through DFFFH, each 8K section is controlled by the switches in S1 and …

1, NorthStar HORIZON Random Access Memory North Star Computers, Inc. 14440 Catalina St., San Leandro, CA 94577 USA (415) 357-8500 TWX/Telex (910) 366-7001 HRAM HORIZON Random Access Memory USER/ TECHNICAL MANUAL HORIZON is a registered trademark of Nor…

51, HRAM USER/TECHNICAL MANUAL TROUBLESHOOTING 6 The procedures in the following sections may be used to troubleshoot the HORIZON system when it is suspected that the HRAM board is not functioning properly. WARNING DO NOT REMOVE THE COVER FROM THE HORIZON UNTIL THE POWER…

49, HRAM USER/TECHNICAL MANUAL 5.10 VOLTAGE REGULATORS There are three voltage regulators on the HRA'M board. These regulators produce +12 volts, +5 volts and -5 volts. All three of these voltages are used by the RAM chips. The +5 volts is also used by the digital logic chip…