KY11 - ever debug one?

Van: cctalk-bounces at classiccmp.org namens Brad Parker Verzonden: zo 22-04-2007 02:43 Aan: General Discussion: On-Topic and Off-Topic Posts Onderwerp: KY11 - ever debug one? Ok, I still have the printset with all scribbles that I made while working on it. First, how do you boot your 11/34? Do you use the keypad to enter a start address? I'd like to know, because that eliminates a lot of possible problems! (and useless writing here). Ok, only looking at the display stuff. 1. Check DCLO. It is used! (see drawing KY-1) 2. DC OK Led will always be on, as long as +5V is present. 3. Check pins 1, 2, and 7 of the 7447 and the DRIVE # L signals, they should have a repetitive pulse. FIY, the connector pinout is as follows on the console board (ASCII art): __________________________________ | | 19 17 15 13 11 9 7 5 3 1 <---- row of pins near edge of the board | 20 18 16 14 12 10 8 6 4 2 <---- row of pins to the "center" of the board | ^card edge If you do not know if the keypad works, check if the 8008 is running. There should be pulses on D0..D7 and S0-S1-S2. INTR will be active (high, IIRC) if DC LO is active, or the state on S0-1-2 indicates STOP (from the timing states decoder E23, pin 2). Can you tell a bit more what the console does, or does not? - Henk. This message and attachment(s) are intended solely for use by the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a 'reply' message. Thank you for your co-operation.