
                                                   11/6/85
                                                   Rob Horning


This is a prioritized list of the issues that need to be resolved
concerning the PDH.  I will try to resolve the A priority issues
this month.

A1 - Change the PAL equations to remove possible glitches, abort
     accesses when ERROR is asserted, and to fix the FP clock.

A2 - Make the changes to give positive margin on the MID_BUS timing.

A3 - Make the changes to fix the problem with accessing the real time
     clock.

A4 - Make the changes to the LED status register to match the latest
     definition.  Establish the definition.

A5 - Make design changes to RTC power isolation circuit.

A6 - Finalize the design of the RTC/EEPROM write protection circuit.

A7 - Select proper diodes and capacitor for the RTC battery.

A8 - Select the EEPROM to use and make sure that there is not a
     problem with the ready line.

A9 - Decide what ROM's/EPROM's will be supported and how many.  Design
     the circuit to support these.  Fix the inverted bit.

A10 - Design the RTC crystal circuit.

A11 - Get the schematic ready for layout.

B1 - Help with layout as needed.

B2 - Bread board and test the changes that were made.

B3 - Decide if a lithium battery should be used and if so design the 
     circuit.

B4 - Characterize the crystals to establish the clock accuracy.

C1 - Investigate getting a better RTC chip.

C2 - Improve the ROM access time.

