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add more detail to tech specs

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Amber Zeller
2021-05-07 23:02:02 -04:00
parent 222f0a33f8
commit 0b3f9f4703
2 changed files with 47 additions and 14 deletions
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37
docs/chibi_pc-09_technical_specification.html
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@@ -55,7 +55,7 @@
<tbody>
<tr>
<td>0000 - 07FF</td>
<td>First Kernel Block</td>
<td>Kernal Root Block</td>
</tr>
<tr>
<td>0800 - EFFE</td>
@@ -67,7 +67,7 @@
</tr>
<tr>
<td>F7FF - FFFF</td>
<td>Reset Vectors</td>
<td>Vector Block</td>
</tr>
</tbody>
</table>
@@ -93,7 +93,22 @@
</tbody>
</table>
<h2 id="expansion-card-description">Expansion Card Description</h2>
<p>Byte 0 of every card should contain a &#39;type&#39; descriptor.</p>
<p>Byte 0 of every card should contain a descriptor. The structure of the descriptor is described in the following table.</p>
<table>
<thead>
<tr>
<th>Bits</th>
<th>Descriptor</th>
</tr>
</thead>
<tbody>
<tr>
<td>0-2</td>
<td>Type</td>
</tr>
</tbody>
</table>
<h3 id="type-descriptor-table">Type Descriptor Table</h3>
<table>
<thead>
<tr>
@@ -104,20 +119,30 @@
</thead>
<tbody>
<tr>
<td>00</td>
<td>000</td>
<td>Block Storage</td>
<td>SD Card</td>
</tr>
<tr>
<td>01</td>
<td>001</td>
<td>ANSI I/O Stream</td>
<td>UART</td>
</tr>
<tr>
<td>02</td>
<td>010</td>
<td>ANSI Compatible Graphics Device</td>
<td>VGA64</td>
</tr>
<tr>
<td>011</td>
<td>Input Device</td>
<td>Keyboard</td>
</tr>
<tr>
<td>1xx</td>
<td>Other</td>
<td>Other</td>
</tr>
</tbody>
</table>

24
docs/chibi_pc-09_technical_specification.md
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@@ -20,10 +20,10 @@
| Address Range | Description |
| ------------- | ---------------------- |
| 0000 - 07FF | First Kernel Block |
| 0000 - 07FF | Kernal Root Block |
| 0800 - EFFE | Standard Memory Blocks |
| EFFF - F7FE | I/O Block |
| F7FF - FFFF | Reset Vectors |
| F7FF - FFFF | Vector Block |
## I/O Block Description
@@ -38,10 +38,18 @@
## Expansion Card Description
Byte 0 of every card should contain a 'type' descriptor.
Byte 0 of every card should contain a descriptor. The structure of the descriptor is described in the following table.
| Type Descriptor | Description | Example |
| --------------- | ------------------------------- | ------- |
| 00 | Block Storage | SD Card |
| 01 | ANSI I/O Stream | UART |
| 02 | ANSI Compatible Graphics Device | VGA64 |
| Bits | Descriptor |
| ---- | ---------- |
| 0-2 | Type |
### Type Descriptor Table
| Type Descriptor | Description | Example |
| --------------- | ------------------------------- | -------- |
| 000 | Block Storage | SD Card |
| 001 | ANSI I/O Stream | UART |
| 010 | ANSI Compatible Graphics Device | VGA64 |
| 011 | Input Device | Keyboard |
| 1xx | Other | Other |