From: Spiro Trikaliotis (trik-news_at_gmx.de)
Date: 2003-09-24 10:18:06
Hello Nick,
On Wed, Sep 24, 2003 at 03:35:53PM +0800, ncoplin@orbeng.com wrote:
> One thing I didn't uderstand from the schematic (not being able to read
> german) is how are the LEDs refreshed... is the memory location accessed
> often enough that the display is updated and steadily lit?
Reading the text: Yes, that is exactly what the two boards do. There is no
storing of information. From this, I conclude that they are written often
enough. This obviously will be true when doing disc accesses, anyway, I'm not
sure if it is true if the drive is idle. Possibly, the job queue will access
these RAM areas regularly if idle, but I'm not sure.
The EPROM does the hex to bcd conversion. The text says that these
converters are had to come by (at least at 1991).
HTH,
Spiro.
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