forked from amberisvibin/chibi-pc09
add more detail to tech specs
This commit is contained in:
@@ -55,7 +55,7 @@
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<tbody>
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<tr>
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<td>0000 - 07FF</td>
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<td>First Kernel Block</td>
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<td>Kernal Root Block</td>
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</tr>
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<tr>
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<td>0800 - EFFE</td>
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@@ -67,7 +67,7 @@
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</tr>
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<tr>
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<td>F7FF - FFFF</td>
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<td>Reset Vectors</td>
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<td>Vector Block</td>
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</tr>
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</tbody>
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</table>
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@@ -93,7 +93,22 @@
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</tbody>
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</table>
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<h2 id="expansion-card-description">Expansion Card Description</h2>
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<p>Byte 0 of every card should contain a 'type' descriptor.</p>
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<p>Byte 0 of every card should contain a descriptor. The structure of the descriptor is described in the following table.</p>
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<table>
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<thead>
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<tr>
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<th>Bits</th>
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<th>Descriptor</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>0-2</td>
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<td>Type</td>
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</tr>
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</tbody>
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</table>
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<h3 id="type-descriptor-table">Type Descriptor Table</h3>
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<table>
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<thead>
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<tr>
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@@ -104,20 +119,30 @@
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</thead>
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<tbody>
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<tr>
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<td>00</td>
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<td>000</td>
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<td>Block Storage</td>
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<td>SD Card</td>
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</tr>
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<tr>
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<td>01</td>
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<td>001</td>
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<td>ANSI I/O Stream</td>
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<td>UART</td>
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</tr>
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<tr>
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<td>02</td>
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<td>010</td>
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<td>ANSI Compatible Graphics Device</td>
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<td>VGA64</td>
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</tr>
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<tr>
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<td>011</td>
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<td>Input Device</td>
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<td>Keyboard</td>
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</tr>
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<tr>
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<td>1xx</td>
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<td>Other</td>
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<td>Other</td>
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</tr>
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</tbody>
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</table>
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