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n8vem-gg-archive:html-2015:jun:msg00034 [2024/02/15 14:24] – Initial import from Wayback Machine n8vem-gg-archive:html-2015:jun:msg00034 [2026/06/15 12:05] (current) – external edit 127.0.0.1
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 +/* Imported from Wayback Machine
 +   Original URL : https://www.retrobrewcomputers.org/n8vem-gg-archive/html-2015/Jun/msg00034.html
 +   Snapshot date: 2024-02-15
 +   Generator    : wayback-archiver
 +*/
 +
 +----
 +
 +[[[msg00005.html|Date Prev]]][[[msg00032.html|Date Next]]][[[msg00026.html|Thread Prev]]][[[msg00035.html|Thread Next]]][[[maillist.html#00034|Date Index]]][[[threads.html#00034|Thread Index]]]
 +
 +====== Re: N8-4314 Issues ======
 +
 +----
 +
 +  * //To//: <n8vem@googlegroups.com>
 +  * //Subject//: Re: N8-4314 Issues
 +  * //From//: RichLeary <<Richar...@gmail.com>>
 +  * //Date//: Sat, 13 Jun 2015 08:39:14 -0700 (PDT)
 +  * //In-reply-to//: <1218c8a3-442a-451b-b9ba-10f034cf4ab9@googlegroups.com>
 +  * //References//: <74c7c260-c487-4de0-9d4e-8fa91356ec4f@googlegroups.com> <1218c8a3-442a-451b-b9ba-10f034cf4ab9@googlegroups.com>
 +
 +----
 +
 +Great News - my second attempt at building a N8-4314 appears to be a good one. System booted right up using ROMWBW 2.7.1 and is totally stable. SD card and LED are working as expected. RTC is working correctly.
 +
 + 
 +
 +I need to test floppy interface and just for fun exercise some of the other I/O including the video, PS2 keyboard, and audio. I need to do some research on that score. As is, the 9918 appears to be responding to some ROMWBW initialization as the screen shows a full screen of the same symbol after a reset. The usual lights on a connected keyboard are dark - do not know if that means anything.
 +
 + 
 +
 +A note on as-built configuration. I used all 74LS logic except for the 574's that are 74ALS574's just because I did not immediately find 74LS574's at DigiKey, my preferred source. CPU oscillator is 18.432 MHz. Since I have no plans to use the ECB interface I have not set the K1 configuration - there is no jumper on K1. K21 & K22 are set to 1-2 jumpered but the two 4700 ohm resistors are still in place - without anything connected to the ECB bus this should also be a "don't care".
 +
 + 
 +
 +Rich Leary
 +
 + 
 +
 +----
 +
 +  * **Follow-Ups**:
 +    * **[[msg00035.html|Re: N8-4314 Issues]]**
 +      * //From:// Wayne Warthen <wwar...@gmail.com>
 +
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