Steve Toner-
Program Load
03/20/2018 at 00:55 • 0 comments -
Tracking Down a Problem in the Microcode
03/16/2018 at 15:36 • 0 comments -
Hello World!
03/05/2018 at 16:54 • 0 comments -
Memory Test
02/27/2018 at 00:41 • 0 comments -
Microcode Assembler
02/14/2018 at 05:30 • 0 comments -
Trying to Run Some Microcode
02/10/2018 at 01:25 • 0 comments -
Testing the Front Panel
02/02/2018 at 18:49 • 0 comments -
Feature Creep?
01/15/2018 at 19:54 • 0 commentsNo, not feature creep, just an ECO...
I want to have diagnostic code in the microcode and need some way to report an error condition. What I've decided on is to reserve the last 15 instructions in microcode memory for error conditions. These locations will contain instructions that jump to themselves. Then I can check if the high 8 bits of the address are FF (hex) and display the contents of the lowest 4 bits on some board-mounted LEDs if so. I looked at using a nifty hexadecimal display (TIL311/DIS1417/HDSP0762) but they are rather expensive (especially for something that is never supposed to happen). So settled on a Kingbright WP914CK/$IDT display.
Updated schematics:
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Making the Boards
12/25/2017 at 00:48 • 0 comments -
Front Panel
12/17/2017 at 04:47 • 0 comments
