Subject: Re: AV300, AV400, and AV4300 series address map and hardware specs
To: Chris Tribo <email@example.com>
From: Matthew Hudson <firstname.lastname@example.org>
Date: 09/15/2003 23:03:55
Yes the 85/9500+ use the 88410
Chris Tribo wrote:
>some other notes
>the Z8536 is listed as the CIO, who's job it is to provide a programmable
>interval timer and a time of day counter (RTC?)
>the SCN2661 is the keyboard controller.
>Since DUART2 on the AV400 series only uses one port, some of the
>extra register space on the chip is used to provides data strobe and
>data select lines to the parallel interface chip, which I can't see
>because it's under the frame buffer. Interesting method of flow control.
>the speaker and associated counter/timer are programmed through registers
>on DUART1, odd.
>LANCE AM7990 ethernet - "The LAN interface does not have data buffers; the
>interface uses system memory as its data buffer. The controller has access
>to the first 16MB of system memory, which may be shared with other
>resources. The operating system, via the control and status registers,
>must ensure that the Ethernet controller does not access memory used by
>other controllers. Access to system memory must be carefully tracked to
>prevent overwriting valid data with new data." Well, I guess we can get
>something bigger than an 8k FIFO with this :)
>as for 884xx CMU's on the 8500+, I don't know offhand, but I can find out
>in a few weeks if/when the system is taken out of production use(!). Or,
>if I have the 8500 programming book, but I don't think I do. The manuals I
>have in front of me cover the 100,200,300,400,3000,4300,5000, and 6000.
>The nice thing about Windows is - It does not just crash, it displays a
>dialog box and lets you press 'OK' first.
> -- Arno Schaefer