nucleus產(chǎn)品介紹-資料下載頁(yè)
2024-09-29 20:30本頁(yè)面
【導(dǎo)讀】–基本圖形包，包括畫線、字符等，以及填涂多邊形，調(diào)色板控制等有用的工具；括畫一個(gè)窗口，創(chuàng)建一個(gè)下拉菜單等；不同圖形設(shè)備的特殊應(yīng)用；能很快開發(fā)用戶界面；能為各種尺寸的屏幕創(chuàng)建界面；多種寬度的線條；鍵盤和事件的處理；用戶定義的指針；屏幕和虛擬位圖的“bitblit”轉(zhuǎn)換；本地存儲(chǔ)圖象的保存和恢復(fù)；縮放或裁減圖片到任意尺寸；域的計(jì)算和繪制功能；剪輯成不規(guī)則形狀的區(qū)域；圓角的矩形——填涂或框架；雙色或多色圖案；可編程的虛線的寬度；在對(duì)細(xì)線進(jìn)行擦除的時(shí)候，會(huì)對(duì)兩端的“end-. 可選擇使用“Round-pen”，使得在畫線的時(shí)候。，無(wú)論哪個(gè)方向都可以保證圖象的寬度一致；與Nucleus文件系統(tǒng)的接口：。鼠標(biāo)的輸入和控制。–可以作為一個(gè)Nucleus應(yīng)用程序中的任務(wù)，提供相應(yīng)的調(diào)用函數(shù)；–設(shè)備初始化和管理；應(yīng)用可裁減，以適應(yīng)各種CPU的資源；–下拉菜單，對(duì)話框，按鈕，滾動(dòng)條等；–用戶自定義窗口小部件；能辨認(rèn)PCX和BMP文件格式；也可以支持開發(fā)GIF,JPEG,和TIFF文件格式;
【正文】 tains bad sectors FF8FFF FFF8FFFF End of file FAT 文件系統(tǒng)基本結(jié)構(gòu) FAT Region ? FAT chaining example (FAT16) …… In directory entry FAT 文件系統(tǒng)基本結(jié)構(gòu) Root Directory Region ? Only in FAT12/16 – There is no root directory region in FAT32 ? Array of 32byte directory entry reserved FAT(p) FAT(b) Root dir File and directory …… FAT 文件系統(tǒng)基本結(jié)構(gòu) Root Directory Region ? Max number of root directory entries depends on the type of volume ? FAT32 doesn’t have root directory region, so no limit on count of files/dir in root directory Volume type Max num of root dir entry 360 kB Floppy Disk 112 720 kB Floppy Disk 112 MB Floppy Disk 224 MB Floppy Disk 224 MB Floppy Disk 448 Hard Disk 512 FAT 文件系統(tǒng)基本結(jié)構(gòu) File and Directory Region ? Where real data block resides ? Array of clusters reserved FAT(p) FAT(b) Root dir File and directory …… 目錄體系 ? directory entry – Holds metadata（ 元數(shù)據(jù) ） of files ? () ? File attribute (regular file, directory, volume) ? Creation time/date ? Last access date ? Last modified time/date ? First cluster number ? File size – 32 bytes long 目錄體系 ? Structure (32 bytes) name ext create time create date last modified date last access date last modified time attr unused (0) FAT 12/16 : unused first cluster file size FAT32 : first cluster hi 目錄體系 ? Special meaning of name[0] – 0xE5 : the directory entry is free – 0x00 : the directory entry is free, and no allocated directory entries after this – 0x05 : actual character for this byte is 0xE5 (kludge for Japan KANJI) 目錄體系 ? Attribute archive dir volume system hidden read only This bit is set when file is created, renamed, or written to. support backup utilities If this bit is set, this entry provides disk volume label should be one in entire volume 目錄體系 ? Date ( ~ ) Day of month (131) Month of year (112) Year from 1980 (0127) Time (00:00:00 ~ 23:59:58) 2sec count (029) minutes (059) Hours (023) 長(zhǎng)文件名 ? VFAT ； ? When creating a file with LFN, – Windows creates a conventional name in one directory entry – And, creates one or more secondary directory entries, one for each set of 13 characters in LFN ? Additional LFN entries has all volume, readonly, system, hidden attribute bits set ? LFN uses Unicode (2 bytes) 長(zhǎng)文件名 ? structure filename[15] filename[6] fix (0x00) fix (0x00) checksum attr (0x0F) filename[711] filename[1213] Sequence number of entry in LFN entry set ( last entry must be OR’d by 0x40 (01000000)) 長(zhǎng)文件名 ? LFN example (―The quick ‖) FAT中的計(jì)算 ? 文件系統(tǒng)的關(guān)鍵在于查找 ： – 系列計(jì)算公式 ? FAT1起始邏輯扇區(qū)號(hào)＝ 保留扇區(qū)數(shù)； ? FAT2起始邏輯扇區(qū)號(hào)＝ FAT1起始邏輯扇區(qū)號(hào)＋每 FAT扇區(qū)數(shù)； ? Root起始邏輯扇區(qū)號(hào)＝ FAT2起始邏輯扇區(qū)號(hào)＋每 FAT扇區(qū)數(shù)； ? Data起始邏輯扇區(qū)號(hào)＝ Root起始邏輯扇區(qū)號(hào)＋根目錄項(xiàng)數(shù) 32247。 512； ? 第 k簇的第一個(gè)邏輯扇區(qū)號(hào)＝ Data起始邏輯扇區(qū)號(hào)＋（ k－ 2） 每簇扇區(qū)數(shù)。 NUCLEUS 原型工具 Nucleus MNT/VNET ? Nucleus PLUS for Windows NT – Nucleus PLUS program executing as Windows NT Process – Nucleus PLUS tasks are Windows NT threads ? Virtual Networking using Nucleus NET on Windows NT – Nucleus to Nucleus – Nucleus to WinSock – Nucleus to Physical Network Nucleus VNET Diagram WinSock Application WinSock Application NDIS Virtual NDIS Shared Memory VNETDRV Nucleus NET Nucleus PLUS Physical Network Physical Node Windows NT Application Space Windows NT Kernel MNT ? Microsoft Visual Developer Studio Used to Support Cross Development Tools – Project Manager – Browser – Other software tools
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