bdmr4011.htm

mips架构的bootloader,99左右的版本 但源代码现在没人更新了

<title>BDMR4011</title>
<h1 align=center>BDMR4011</h1>
<!--INDEX "LR4011 Evaluation Board" BDMR4011 4011 "Nitro II" LR4500 -->
<!--INDEX Sonic 2681 Am29F080 -->

</dl><h2>Description</h2><dl><dd>

The BDMR4011 is the evaluation board for the 4011 Processor. It comes
with it's own special power supply.<p>

</dl><h2>Memory Map</h2><dl><dd>
<pre>
	RAM	   a000.0000 8MB
	ROM	   bfc0.0000 1 eprom socket
	DUART	   be00.0000 2681
	Flash	   bfd0.0000 when not configured as boot device
	Ethernet   Sonic 10baseT only
</pre>

</dl><h2>Crystals</h2><dl><dd>
<pre>
	U2	CPU clock (typ 80MHz)
	U3	SerialICE Port (1.8432MHz=115200 or 20MHz=1250000)
</pre>

</dl><h2>Interrupts</h2><dl><dd>
<pre>
	int0	2681 duart
	int1	Sonic
	int2	rtc_sqw
	int3	rtc_inta
	int4	rtc_intb + on-chip SerialICE port
	int5	-
</pre>

</dl><h2>External Connections</h2><dl><dd>
<pre>
	Power - 5V DC via coaxial power connector.
	RS232
		J19 ChanA (PMON console)
		J18 ChanB
	SerialICE Port J21
		Note that the SerialICE Port header is mounted such that
		the ribbon cable on the wiggler should pass across the
		board (opposite to bdmr4101).
</pre>

</dl><h2>Jumpers</h2><dl><dd>
<pre>
J7 2 pin jumper
	in = Disable both caches
j8 2 pin jumper
	in = Big Endian
	out = Little Endian
J9 2 pin jumper
	in = boot from eprom
	out = boot from flash
J10 2 pin jumper
       in = J18 (tty1 connector) is connected to chanB on DUART
       	    (serial ice uses SerialICE Port connector).
       out =  J18 is connected to the SerialICE Port through level translators.
            and chanB is unavailable. This requires that the onboard osc be
            selected and installed (U3).
J16 3 pin jumper
       1-2 SerialICE Port Clock comes from oscillator.
       2-3 SerialICE Port Clock comes from SerialICE Port connector
       A board will always transmit it's osc clock to the connector. 
       It is swapped with the clock input on the other board in the cable.
</pre><p>

SerialICE via tty1: J10=out J16=1-2<br>
SerialICE via Wiggler: J10=in J16=1-2<br>

</dl><p><hr>
<b>Navigation:</b> 
<a href="index.htm">Document Home</a> | 
<a href="doctoc.htm">Document Contents</a> | 
<a href="docindex.htm">Document Index</a> <p>