AOOC- Wishbone Amiga OCS SoC Implementation

The OpenCores aoOCS SoC is a Wishbone compatible implementation of most of the Amiga Original Chip Set (OCS) and computer functionality.
AOOCis not related in any way with Minimig - it is a new and independent Amiga OCS implementation.

介绍

July 2011: Project copied to (https://github.com/alfikpl/aoOCS). Further development of aoOCS will continue on github.

Features

• The aoOCS SoC contains the following Amiga/OCS components:
  • blitter
  • copper
  • system control (interrupts)
  • 视频：位数，精灵，碰撞检测
  • audio: 4 channels, low-pass filter
  • user input: PS/2 mouse, PS/2 keyboard and joystick (keyboard arrow keys)
  • floppy: read and write ADF files directly from a SD card. Only the internal floppy drive is implemented
  • 8520年中央情报局
  • AO68000 Opencores IP核心用作AOOCS处理器
• 以上所有组件均为Wishbone修订B.3兼容
• AOOC包含以下其他组件：
  • 用DMA编写的SD卡控制器。仅支持SDHC卡。
  • 用HDL编写的10/100 MBIT以太网控制器发送当前的VGA框架（框架抓框）
  • HDL drivers for SSRAM, PS/2 keyboard, PS/2 mouse, audio codec, VGA DAC
• AOOCS仅使用一个外部内存：带有36位单词和管道访问的SSRAM。SSRAM位于大约250KB的视频缓冲区。ROM使用了另外256KB。所有休息记忆都可以用作芯片公羊。
• 屏幕上的显示器在HDL中作为有限状态机实现。处理SOC所需的固件没有其他控制器/处理器。
• The following options are available on the On-Screen-Display:
  • select ROM file to load (only Amiga Kickstart v1.2 was tested)
  • enable or disable Joystick (keyboard arrow keys)
  • 启用或禁用软盘写保护
  • 插入软盘 - 从列表中选择一个
  • eject an inserted floppy
  • reset the system
• The On-Screen-Display is independent of the running Amiga software. It is enabled and disabled by the Home key and controled by the keyboard arrow keys and the right CTRL key.
• Only PAL timings are implemented.
• 视频输出与VGA兼容：640x480在70 Hz时。一种相当简单的方法用于将256个PAL的水平线扩展到480个VGA线：除了每8个外，所有线都会加倍。
• 该系统通常使用一个时钟：30 MHz。还有两个时钟：与外部硬件（音频编解码器，以太网控制器）接口的12 MHz，25 MHz生成。单个AltPll用于生成一个50 MHz外部时钟的所有三个时钟。有关时钟的更多信息，可以在时钟上找到。
• 实现了VGA框架抓键，该抓框通过IP/UDP数据包中的100 mbit以太网发送捕获的帧。
• 该系统在Altera Cyclone II上使用了约26.400 LE，大约267.000位片上RAM。
• The blitter functionality was tested against the E-UAE Amiga software emulator.
• 仅在Terasic DE2-70板（www.terasic.com.tw）上进行测试。
• Documentation generated by Doxygen (www.doxygen.org) with doxverilog patch (http://developer.berlios.de/projects/doxverilog/). The specification is automatically extracted from the Doxygen HTML output.

叉骨兼容性

• 版本：Wishbone规范修订版B.3，
• 一般说明：32位叉骨接口，
• Wishbone数据端口大小：32位，
• Data port granularity: 8-bits,
• Data port maximum operand size: 32-bits,
• 数据传输订购：大恩迪安，
• Data transfer sequencing: UNDEFINED,
• 约束clk_i信号：时钟中描述。

Similar projects

Other Open-Source Amiga implementations include:

• minimig（http://code.google.com/p/minimig/) - FPGA-based re-implementation of the original Amiga 500 hardware. Runs on the Minimig PCB and also on Terasic DE1,2 boards.

限制

• No filesystem support on the SD card. Data is read from fixed positions. The contents of the SD card is generated by theAOOC_tooldescribed at Operation.
• 没有视频外部同步，蕾丝模式，灯台，genlock音频启用，颜色复合材料（BPLCON0）
• All bitplain data is fetched at once in a burst memory read at the begining of each line. No changes to the bitplain data done after the beginning of a line are visible.
• 目前，AOOC需要一个36位单词SSRAM来存储视频缓冲区。这样，3个像素可以用一个单词存储12位。
• 未实现串行端口。
• Parallel port not implemented.
• Low-pass filter disable/enable by CIA-A port A bit 1 not implemented.
• Proportional controller and light pen not implemented.
• Some rarely used OCS registers are not implemented: strobe video sync, write beam position, coprocessor instruction fetch identify. For a complete list of not implemented registers look at Registers.
• Only some of the Amiga software was tested and works on the aoOCS. A list of aoOCS software compatability is located at Operation.

TODO

• 修复上述一些限制。
• Optimize the design.
• 运行Wishbone验证模型。
• More documentation of Verilog sources.
• 描述在E-UAE来源中进行的测试和更改。
• Prepare scripts for VATS: run_sim -r -> regresion test.
• 将AOOCS SOC移植到Xilinx FPGA。

Status

• Amiga Workbench v1.2 runs with some minor graphic problems: bottom of screen not displayed correctly.
• Prince of Persia runs perfectly.
• 愤怒的翅膀正确运行。简介中的一些声音故障。
• Lotus 2 runs correctly. Some sound problems in intro.
• Warzone runs poor. Some major graphic problems.
• 有关AOOCS软件兼容性的更多信息可在操作中提供。
• July 2011: Project copied to (https://github.com/alfikpl/aoOCS). Further development of aoOCS will continue on github.

要求

• Altera Quartus II synthesis tool (http://www.altera.com) is required to synthesise theAOOCSystem-on-Chip.
• Java SDK（http://java.sun.com) is required to compile theAOOC_tool(The tool is described in Operation).
• A FPGA board. Currently only the Terasic DE2-70 board was tested.
• 伊卡洛斯Verilog模拟器（http://www.icarus.com/eda/verilog/需要编译并运行一些测试。
• Access to Altera Quartus II directory (directory eda/sim_lib/) is required to compile and run some tests.
• GCC（http://gcc.gnu.org)需要编译一些测试es based on E-UAE sources.

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