Comments on: Problems with 8008 serial routines that posted http://www.willegal.net/blog/?p=5399 computers, trains, wargames, fish, railroads and more Thu, 19 Mar 2015 11:08:19 +0000 hourly 1 http://wordpress.org/?v=4.1.1 By: Mike http://www.willegal.net/blog/?p=5399&cpage=1#comment-4743 Mon, 24 Mar 2014 13:46:50 +0000 http://www.willegal.net/blog/?p=5399#comment-4743 My bad memory fails me again – all my software has the serial transmitter connected to bit 0 of the transmit port. The original code was good, but wouldn’t work when connected to bit 7, which this driver is designed to support.

]]> By: Corey Cohen http://www.willegal.net/blog/?p=5399&cpage=1#comment-4742 Sat, 22 Mar 2014 17:51:11 +0000 http://www.willegal.net/blog/?p=5399#comment-4742 One comment to this new output routine.

You should also load a 200 into the accumulator and output it to initialize the state of the latch in the serial port “box” when your program starts. If you miss this, your first character might not appear correctly because the logic state of the serial port output is unknown. Once the driver outputs it’s first character, the port state is known until you shut off power to the latch in the serial port “box” attached to the Output port, in most cases when you power off the Scelbi.

Cheers,
Corey

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