Introduction

ThinkPad X61 is a classical machine, along with T61 they are the last 4:3 ThinkPads made by Lenovo. I bought my X61s used in 2010 (I simply couldn't afford it back in 2007 when it first came out) and keeps using it as my main laptop (I have a much more powerful desktop PC for most of the stuff though). Many of the components have been upgraded since then, 2GB DDR2 is upgraded to 6GB, 160GB spin drive has been replaced by a 512GB SSD, and the TN screen has been replaced with an AFFS (IPS) screen. The thing that never changed is the processor: the 65nm Core 2 Duo L7500.

X61 comes with various CPU options available when buying new:

X61:

• Core 2 Duo T7100, 1.8 GHz, 2 MB L2, FSB 800, 65 nm, 35 W
• Core 2 Duo T7250, 2.0 GHz, 2 MB L2, FSB 800, 65 nm, 35 W
• Core 2 Duo T7300, 2.0 GHz, 4 MB L2, FSB 800, 65 nm, 35 W
• Core 2 Duo T8100, 2.1 GHz, 3 MB L2, FSB 800, 45 nm, 35 W
• Core 2 Duo T8300, 2.4 GHz, 3 MB L2, FSB 800, 45 nm, 35 W
• Core 2 Duo T9300, 2.5 GHz, 6 MB L2, FSB 800, 45 nm, 35 W

X61s:

• Core 2 Duo L7300, 1.4 GHz, 4 MB L2, FSB 800, 65 nm, 17 W
• Core 2 Duo L7500, 1.6 GHz, 4 MB L2, FSB 800, 65 nm, 17 W
• Core 2 Duo L7700, 1.8 GHz, 4 MB L2, FSB 800, 65 nm, 17 W

However, when buying used, especially in 2020, it is really hard to pick one specific processor. Most of the listings online come with a T7100 or T7300 processor, built with a 65 nm process. If the machine is an X61s, then the 65 nm processor is pretty much the only choice.

Unless the processor can be replaced or upgraded.

It is quite common to replace the processor in T61s, just buy a new processor, install that on to the motherboard, done. Or if one wants to use newer FSB 1066 processors or even quad-core processor, BIOS mod and motherboard mod are available to allow the processor to run on the T61 motherboard.

The X61, on the other hand, has the processor soldered down on to the board, making it harder to replace the processor. And it is much harder to buy BGA processors than just normal PGA processors: pretty much no one would take out the BGA processor from their laptop and just sell that, and it is pretty hard to buy new old stock BGA processors. But the good thing is if the CPU can be indeed bought and installed, all the mods available to the T61 are also available to the X61.

This post is a comprehensive note about how to install probably any Core 2 Duo mobile processors onto X61 if the power supply and cooling allow. And my method uses a PGA processor rather than a BGA processor so the processor is still easily purchasable on eBay or other platforms. Quad-core processors run much hotter and require further ACPI mod which is not described in this post.

I understand that these kinds of mod have been done on X61 many times before. But I just want to document comprehensively how I did it and what each step is.

I am also aware of the existence of the X62/X63 motherboard project. This project only focuses on upgrading the original motherboard.

I used P8600 as an example in this post, but other processors should also work.

All information is provided "as is". I will not be responsible for any damage due to the use or misuse of the information provided. Modding BIOS and hardware is risky and likely to permanently brick the machine if not done properly. Do this at your own risk.

有段时间没有写过测评了，这次为大家带来的是第一款登上太空的电脑——ThinkPad 750C以及其小改款755C的简单展示。

基本信息

• 产品名称：ThinkPad 750C / 755C
• 厂商：IBM
• 类别：Laptop
• 发布年份：1993 / 1994年
• CPU：Intel 80486SL-33 / 80486DX2-50
• 硬盘：170MB / 340MB HDD
• 软驱：1.44MB / 2.88MB
• RAM：板载4MB-8MB 外扩16MB
• 屏幕类型：TFT液晶显示器，TN Normal-White，256色
• 屏幕规格：640x480 10.4"
• 音源：CS4248 WSS
• 接口：2xPCMCIA + MIC + 耳机 + 端口扩展器接口
• 供电：AC + Li-Ion电池
• 质量：2.8 kg (含电池)
• 操作系统：DOS / Windows 3.x

展示

这个机子本身设计没有太多的亮点，所以就稍微放几张图看看好了。

前言

基本信息

Before you read

本文大概是我写的第一篇博文吧，09年，那年我应该是小学五年级。文本有经过改动，代码没有修改。

前言

有这么一篇文章:《利用thinkpad aps重力感应系统玩游戏！！！》，不知道用小黑的朋友有没有看过，www.douban.com/note/39019617/ 通过调用APS来玩游戏。

APS是ThinkPad内置的一套硬盘保护系统，原理是利用加速度传感器来检测冲击，并在冲击发生时暂停硬盘操作以保护硬盘。本文讨论的是如何自己编程来读取APS的数据。

数据调用

在类型定义里加入:

  ACCElREPORT = record
    PresentState:integer;
    LatestRawAccelDataX:word;
    LatestRawAccelDataY:word;
    LatestAccelDataX:word;
    LatestAccelDataY:word;
    Temperature:char;
    LatestZeroG_X:word;
    LatestZeroG_Y:word;
  end;
  PACCELREPORT=ACCELREPORT;

  HDAPS_API = Integer;

  ReadHDAPS = function(pAcceleration:PACCELREPORT):HDAPS_API;stdcall;

变量定义：

  HDAPS: ReadHDAPS;
  hDLL: THandle;
  HDAPSData: ACCElREPORT;
  OffsetX: Integer;
  OffsetY: Integer;
  LoadOK: Boolean;

DLL加载：

try
    {Get DLL}
    hDLL := LoadLibrary('Sensor.dll');
    if hDLL <> 0 then
      HDAPS := GetProcAddress(hDLL,'ShockproofGetAccelerometerData');
  except
    on ex:Exception do
    begin
      ShowMessage('Error:'+ex.Message);
      Close;
    end;
  end;
    if (HDAPS(@HDAPSData)=1) then
        LoadOK := True;
    DoubleBuffered := True;

#演示应用

我写了个鼠标控制器，可以用来玩仓鼠球。图: