http://www.ninerpedia.org/index.php?action=history&feed=atom&title=Programmable_Flash_Memory_Expansion 2026-04-24T18:32:05Z Revision history for this page on the wiki MediaWiki 1.37.1 http://www.ninerpedia.org/index.php?title=Programmable_Flash_Memory_Expansion&diff=50527&oldid=prev 2021-01-27T13:14:57Z

<p>Mizapf moved page <a href="/wiki/Programmble_Flash_Memory_Expansion" class="mw-redirect" title="Programmble Flash Memory Expansion">Programmble Flash Memory Expansion</a> to <a href="/wiki/Programmable_Flash_Memory_Expansion" title="Programmable Flash Memory Expansion">Programmable Flash Memory Expansion</a>: Typo</p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <tr class="diff-title" lang="en"> <td colspan="1" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="1" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 13:14, 27 January 2021</td> </tr><tr><td colspan="2" class="diff-notice" lang="en"><div class="mw-diff-empty">(No difference)</div> </td></tr></table>

Mizapf http://www.ninerpedia.org/index.php?title=Programmable_Flash_Memory_Expansion&diff=49574&oldid=prev 2015-08-21T13:44:32Z

<p>Created page with &quot;The PFM512 boot device modification replaces the standard 16KiB 28-pin boot EPROM with a 512KiB 32-pin Atmel 29c040 flash chip. The chip is visible in four 128KiB banks residing...&quot;</p> <p><b>New page</b></p><div>The PFM512 boot device modification replaces the standard 16KiB 28-pin boot EPROM with a 512KiB 32-pin Atmel 29c040 flash chip. The chip is visible in four 128KiB banks residing at memory pages 0xF0 - 0xFF. Each page is selected via two re-purposed (normally unused) TMS9901 outputs:<br /> <br /> {| style=&quot;width:70%; margin-top:3ex&quot;<br /> |-<br /> | colspan=&quot;4&quot; style=&quot;background-color:lightgray; text-align:center&quot; | PFM512 Bank Selection<br /> |-<br /> | style=&quot;width:15%; font-weight:bold&quot; | CRU 0x28<br /> | style=&quot;width:15%; font-weight:bold&quot; | CRU 0x3A<br /> | style=&quot;width:15%; font-weight:bold&quot; | Bank<br /> | style=&quot;font-weight:bold&quot; | Notes<br /> |-<br /> | 0<br /> | 0<br /> | Bank 0 Default<br /> | Boot code and Operating System<br /> |-<br /> | 0 <br /> | 1 <br /> | Bank 2<br /> | Flashdisk bank #1<br /> |-<br /> | 1<br /> | 0<br /> | Bank 1 <br /> | Flashdisk bank #2<br /> |-<br /> | 1<br /> | 1<br /> | Bank 3<br /> | Flashdisk bank #3<br /> |}</div>

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