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MVME5100 Single Board Computer Programmer's Reference Guide

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3<br />

System Memory Controller (SMC)<br />

512MB<br />

(64Mx4)<br />

$00000000<br />

$00008000<br />

$10000000<br />

64MB<br />

(8Mx16) 2<br />

$00000000<br />

$00002000<br />

Table 3-20. Address Lists for Different Block Size Checks<br />

256MB<br />

(32Mx8)<br />

$00000000<br />

$00004000<br />

$08000000<br />

64MB<br />

(8Mx8) 2<br />

$00000000<br />

$00002000<br />

256MB<br />

(32Mx4)<br />

$00000000<br />

$00008000<br />

32MB<br />

(4Mx16) 3<br />

$00000000<br />

$00001000<br />

128MB<br />

(16Mx16)<br />

$00000000<br />

$04000000<br />

128MB<br />

(16Mx8) 1<br />

$00000000<br />

$00004000<br />

128MB<br />

(16Mx4) 1<br />

$00000000<br />

$00004000<br />

Notes 1. 16Mx8 and 16Mx4 are the same. If the real size is either<br />

one of these, this algorithm will program for 16Mx8<br />

regardless of whether the SDRAM size is 16Mx8 or 16Mx4.<br />

This is not a problem because the Hawk behaves identically<br />

when programmed for either size.<br />

2. 8Mx16 and 8Mx8 are the same. The same idea that applies<br />

to 16Mx8 and 16Mx4 applies to them.<br />

3. This needed only to check for non-zero size.<br />

3. Wait enough time to allow at least 1 SDRAM refresh to occur before<br />

beginning any SDRAM accesses.<br />

3-86 <strong>Computer</strong> Group Literature Center Web Site

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