mirror of
https://github.com/AppleWin/AppleWin.git
synced 2024-11-17 21:04:45 +00:00
39 lines
1.8 KiB
HTML
39 lines
1.8 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
|
<html>
|
|
<head>
|
|
<title>Clock</title>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
|
|
</head>
|
|
<body style="FONT-FAMILY: verdana; BACKGROUND-COLOR: rgb(255,255,255)" alink="#008000"
|
|
link="#008000" vlink="#008000">
|
|
<h2 style="COLOR: rgb(0,128,0)">
|
|
Clock</h2>
|
|
<hr size="4">
|
|
<h3>Clock:</h3>
|
|
<p>AppleWin emulates a No-Slot clock (aka NSC).</p>
|
|
<p>This is a chip (a Dallas SmartWatch DS1216) that sits under one of the 28-pin ROM chips in the Apple II.<br>
|
|
No hardware configuration is required: this chip is always present, but won't interfere with emulation when not in use.
|
|
</p>
|
|
<p>It requires a software driver to be installed (for DOS and ProDOS). This driver then emulates the Thunderclock card.</p>
|
|
<p>Here's a summary of NSC/ROM chip locations and which drivers work:</p>
|
|
<ul>
|
|
<li>"CD" ROM socket: C000-DFFF (internal) ROM space - all drivers work</li>
|
|
<li>"EF" ROM socket: E000-FFFF ROM space - never seen any drivers use this space</li>
|
|
<li>"CF" ROM socket: C000-FFFF (internal) ROM space - all drivers work</li>
|
|
<li>Slot ROM socket: Cs00-CsFF (slot) ROM space - NS.CLOCK.SYSTEM works</li>
|
|
</ul>
|
|
|
|
<p>Here are the drivers and ROM pages they check:</p>
|
|
<ul>
|
|
<li>ProDOS "SWU.SYSTEM" - internal C3</li>
|
|
<li>ProDOS "NS.CLOCK.SYSTEM" - internal C3 C8 / external C1-C7</li>
|
|
<li>GEOS "NoSlot Clock" - internal C8</li>
|
|
</ul>
|
|
|
|
<p><strong>NOTE: </strong>For ProDOS, the load order of drivers is important:</p>
|
|
<p>Some .SYSTEM drivers will <strong>not</strong> chain-load the next driver.<br>
|
|
NS.CLOCK.SYSTEM does, so ensure this is the first one ProDOS finds,
|
|
whereas ZIP.SYSTEM doesn't so put this at the end of the chain.</p>
|
|
</body>
|
|
</html>
|