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Windows 2000 PS/2 Keyboard Encoder Design Windows 95/98/NT/2000/X


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HT82K628A
Windows 2000 PS/2 Keyboard Encoder
Design Windows 95/98/NT/2000/XP Supports Windowskeys Supports PC/AT PS/2 code Supports Japanese Korean Brazilian 101/102/104/105/107/109 keys other special
plication keyboard encoder
external keys Supports Mini-keyboard Internet/Multimedia
European
oscillator Phantom detection power consumption
keyboard
WINDOWS registered trademark Microsoft
corporation
40-pin DIP, 48-pin SSOP packages
General Description
HT82K628A keyboard encoder designed PC/AT, PS/2 compatible machines. HT82K628A accepts keyboard inputs provides 16-character first-in-first-out buffer which data stored. inexpensive oscillator used system clock. Simple implementation this device advantage high performance cost keyboard applications.
Assignment
Rev. 1.70
June 2008
HT82K628A
Description
Name Description Keyboard matrix scanning output pins Keyboard matrix scanning input pins Negative power supply, ground Scroll Lock indicator Lock indicator Bidirectional data transmission line Synchronous clock signal. Used clock transmission data. Mini-keyboard select, enables function connected VSS. Macro select, disables function connected VSS. Caps Lock indicator Chip reset input. Active low. Built-in power-on reset circuit reset entire chip. Chip also externally reset RESET pin. 5.0V positive power supply System clock input; 58.3kW resistor connected connection 10~7, 2~1, 40~39, 29~22, R0~R19 14~11 6~3, 38~35 C0~C7 SCROLL DATA CLOCK Select Macro Select CAPS RESET OSC1
Absolute Maximum Ratings
Supply Voltage .VSS-0.3V VSS+5.5V Input Voltage .VSS-0.3V VDD+0.3V Storage Temperature .-50°C 125°C Operating Temperature .-25°C 70°C
Note: These stress ratings only. Stresses exceeding range specified under Maximum cause substantial damage device. Functional operation this device other conditions beyond those listed specification implied prolonged exposure extreme conditions affect device reliability.
Electrical Characteristics
Symbol IOH1 IOH2 ILED Rph1 Rph2 fSYS Parameter Operating Voltage Operating Current OSC) Input Voltage Input High Voltage Sink Current (C0~C7, R0~R19, DATA, CLOCK) Source Current (C0~C7, R0~R19) Source Current (Scroll, Num, Caps) Sink Current (Scroll, Num, Caps) Internal Pull-high Resistance (C0~C7, R0~R19) Internal Pull-high Resistance (DATA, CLOCK) Internal Pull-high Resistance (RESET) System Clock OSC) Test Conditions Conditions load, fSYS= 4MHz VOL= 0.5V VOH= 4.5V VOH= 4.5V VOL=3.4V
Ta=25°C Min. Typ. Max. Unit -2.5 5.25
Rev. 1.70
June 2008
HT82K628A
Functional Description
HT82K628A basic function detect press release activity transmit corresponding scan code, well make break codes system. device also accepts commands from system responds system necessary. communication between keyboard system managed through CLOCK DATA pins. keyboard begins scan pressed released keys commands from system after (Basic Assurance Test) been run. Basic Assurance Test following functions offered Basic Assurance Test:
Turns status indicators. Keyboard processor test. test. Turns status indicators, i.e. LEDs. Reports result system.
Command Set/Reset Status Indicators Echo Invalid Command Select Alternate Scan Codes Invalid Command Read Typematic Rate/Delay Enable Default Disable Default Keys Typematic Keys Make/Break Keys Make Keys Typematic/Make/Break Type Typematic Type Make/Break Type Make Resend Reset
Value
Note:
During BAT, activity line ignored. turned beginning turned BAT. takes minimum 450ms after maximum 2.5s. response satisfactory completion response failure error. reset keyboard command will also cause keyboard execute BAT. Completion codes sent between 500ms after reset command acknowledged. After BAT, keyboard sets keys typematic make/break, sets default typematic rate delay.
commands sent HT82K628A time HT82K628A will respond within 25ms except when performing internal diagnostics executing Reset command. Set/Reset Status Indicators Three status indicators keyboard-Num Lock, Caps Lock, Scroll Lock-are accessible host. HT82K628A activates deactivates these indicators when receives valid command-code sequence from system. command sequence begins with command byte (hex ED). HT82K628A responds command byte with ACK, discontinues scanning, assignments this option byte follow: Indicator Scroll Lock Indicator Lock Indicator Caps Lock Indicator Reserved (Must
Power-on important activities take place when power first applied keyboard. first presence signal (Power-On-Reset) that resets keyboard processor. second activity running self test (Basic Assurance Test) routine.
Command from Host following table shows commands that host send their hexadecimal values. indicator indicator turned indicator turned off.
Rev. 1.70
June 2008
HT82K628A
HT82K628A responds option byte with ACK, sets indicators HT82K628A previously enabled, continues scanning. status indicators will reflect bits option byte activated deactivated combination. another command received place option byte, execution Set/Reset Mode Indicators command stopped, with change indicator status, command processed. Immediately after power-on, lights default state. Default Default Disable commands received, lamps remain state they were before command received. Echo Echo diagnostic aid. When HT82K628A receives this command, issues response HT82K628A previously enabled, continues scanning. Invalid Command invalid commands supported. HT82K628A receives these sends HT82K628A will acknowledge command, returns Resend command continues previous scanning state. Select Alternate Scan Codes This command instructs HT82K628A select three sets scan codes. HT82K628A acknowledges receipt this command with ACK, clears both output buffer typematic key. host then sends option byte keyboard responds with another ACK. option byte value selects scan code selects selects code set3. option byte value causes HT82K628A acknowledge with sends byte telling host which scan code currently use. After establishing scan code set, HT82K628A returns scanning state before receiving Select Alternate Scan Codes command. Read This command requests identification information from HT82K628A. HT82K628A responds with ACK, discontinues scanning sends keyboard bytes Abh. After output second byte, HT82K628A resumes scanning. Typematic Rate/Delay host issues Typematic Rate/Delay command change typematic rate delay. HT82K628A responds command with ACK, stops Rev. 1.70 scanning waits system issue rate/delay value byte. HT82K628A responds value byte with another ACK, sets rate delay value indicated, continues scanning previously enabled). Bit6 indicate delay, bits indicate rate. Bit7 always delay equal plus binary value multiplied 250ms±20%. period (interval from typematic output next) determined following equation: Period (8+A)*(2^B)*0.00417 seconds. Where: binary value bits binary value bits typematic rate each period listed follows: 00000 00001 00010 00011 00100 00101 00110 00111 01000 01001 01010 01011 01100 01101 01110 01111 Typematic Rate 30.0 26.7 24.0 21.8 20.0 18.5 17.1 16.0 15.0 13.3 12.0 10.9 10.0 10000 10001 10010 10011 10100 10101 10110 10111 11000 11001 11010 11011 11100 11101 11110 11111 Typematic Rate
default values HT82K628A follows: Typematic rate= 10.9 characters second Delay 500ms±20% execution this command stops without change existing rate another command received instead rate/delay value byte. Enable Upon receipt this command, HT82K628A will respond with ACK, clears output buffer, clears last typematic key, starts scanning.
June 2008
HT82K628A
Default Disable Default Disable command resets conditions power default states. HT82K628A will respond with ACK, clears output buffer, sets default types (scan code operation only) typematic rate/delay, clears last typematic key. HT82K628A then stops scanning awaits further command. Default Default command resets conditions power default states. HT82K628A will respond with ACK, clears output buffer, sets default types (scan code operation only) typematic rate/delay, clears last typematic then continues scanning. F7H, F8H, F9H, Keys These commands instruct HT82K628A keys type listed below: Value Command Keys-Typematic Keys-Make/Break Keys-Make Keys-Typematic/Make/Break next data output. When Resend received, HT82K628A sends previous output again (unless previous output Resend, which case HT82K628A sends last byte before Resend command). Commands Host following table shows commands that HT82K628A send host, their hexadecimal values. Command Value
Detection Error/Overrun (Code Keyboard Completion Code Failure Core Echo Acknowledge Resend Detection Error/Overrun 83AB (Code
Detection Error HT82K628A sends detection error character conditions keyboard make impossible identify switch closure. HT82K628A using scan code code FFH. sets code 00H. Overrun overrun character placed HT82K628A buffer replaces last code when buffer capacity been exceeded. code sent host when reaches buffer queue. HT82K628A using scan code code FFH. sets code 00H. 83AbH Keyboard keyboard consists bytes, 83AbH. HT82K628A responds Read with ACK, discontinues scanning sends bytes. byte sent first followed high byte. Following output Keyboard HT82K628A begins scanning. Echo HT82K628A sends this code response Echo command. Completion Code Following satisfactory completion BAT, HT82K628A sends AAH. other code indicates keyboard failure.
HT82K628A will respond with ACK, clears output buffer, sets keys type indicated this command, continues scanning previously enabled). Although these commands sent using code set, they affect only scan code operation. FBH, FCH, Type These commands instruct HT82K628A individual keys type listed below: Value Command Type-Typematic Type-Make/Break Type-Make
HT82K628A will respond with ACK, clears output buffer prepares receive identification. identification accomplished host identifying each scan code value defined scan code Only scan code values valid identification. type each identified value indicated command. Although these commands sent using code set, they affect only scan code operation. Resend host sends this command when detects error transmission from HT82K628A. sent only after data transmission before host allows
Rev. 1.70
June 2008
HT82K628A
Failure Code failure occurs, HT82K628A sends this code, discontinues scanning waits host response reset. Resend HT82K628A issues Resend command following receipt invalid input input with incorrect parity. host sends nothing HT82K628A, response required. Data Communications
Data output
Data input
system overrides clock line least 60ms. keyboard checks clock line state intervals 10ms system request-to-send detected, keyboard counts data bits. Data will valid before rising edge beyond falling edge After 10th bit, keyboard checks active level line. line active forced inactive, counts more bit. Note: This action signals system that keyboard received data. Upon reception this signal, system returns ready state, which accept keyboard outputs goes inhibit state until ready.
CLK=0, transmission (keyboard inhibited). CLK=1, DATA=0, transmission (system request send). CLK=1, DATA=1, transmission permitted. Data will valid before trailing edge beyond leading edge clock. checks clock line active level least every 60ms. line contention occurs (system brings clock before tenth clock), clock=data=high.
keyboard line found inactive level following 10th bit, frame error occurred, keyboard continues count until line becomes active. keyboard then makes line inactive sends Resend.
Data Stream Mode 1,2,3 b10: b11: Note: start always data data data data data data data data parity (odd par) stop always
parity either data bits, plus parity bit, always have number 1ms.
Code Number Symbol Make/Break Code 29/A9 02/82 03/83 04/84 05/85 06/86 07/87 08/88 Number Symbol Make/Break Code 2D/AD 2E/AE 2F/AF 30/B0 31/B1 32/B2 33/B3 34/B4
Rev. 1.70
June 2008
HT82K628A
Number Symbol **42 **45 Enter Shift Macro Back Space Make/Break Code 09/89 0A/8A 0B/8B 0C/8C 0D/8D 7D/D6 0E/8E 0F/8F 10/90 11/91 12/92 13/93 14/94 15/95 16/96 17/97 18/98 19/99 1A/9A 1B/9B 2B/AB 3A/BA 1E/9E 1F/9F 20/A0 21/A1 22/A2 23/A3 24/A4 25/A5 26/A6 27/A7 28/A8 2B/AB 1C/9C 2A/AA 56/D6 2C/AC Enter Scroll Lock PgUp PgDn Number Symbol Shift Ctrl Space Ctrl Lock Home Make/Break Code 35/B5 36/B6 1D/9D 38/B8 39/B9 38/E0 1D/E0 45/C5 47/C7 4B/CB 4F/CF 48/C8 4C/CC 50/D0 52/D2 37/B7 49/C9 4D/CD 51/D1 53/D3 4A/CA 4E/CE 7E/FE 1C/E0 01/81 3B/BB 3C/BC 3D/BD 3E/BE 3F/BF 40/C0 41/C1 42/C2 43/C3 44/C4 57/D7 58/D8 46/C6
Caps Lock
*101-Key Keyboard Only **102-Key Keyboard Only
Rev. 1.70
June 2008
HT82K628A
Number Symbol Insert Delete Home PgUp PgDn Base Case Shift+Num Left-Shift Right-Shift Lock
When both shift keys held down: number Number Symbol
Both Shift 52/E0
Base 35/E0
Left-Shift
Right-Shift
35/E0 35/E0 Both Shift 35/E0
When both shift keys held down: number
Number Symbol Print Screen
Base 37/E0 Base
Shift/Ctrl 37/E0
54/D4 Ctrl
Number Symbol Pause
This typematic, associated scan codes occur make code. Number Function ACPI ACPI ACPI Power Sleep Wake-up Number Function Brazil Japanese J131 Japanese J132 Japanese J133 Korea KC-L Korea KC-R
Make/Break code 5E/E0 5F/E0 63/E0
Default Make/Break Make/Break Make/Break
Make/Break code 73/F3 7B/FB 79/F9 70/F0 F1/F0/-
Default Typematic Make Make Make Make Make
Rev. 1.70
June 2008
HT82K628A
Multimedia Function E-Mail Home Favorites Search Refresh Stop Forward Back Media Play/Pause Stop Prev Track Next Track Volume+ VolumeMute Computer Calculator Screen save Minimize Eject Code Number Symbol Make/Break Code 0E/F0 16/F0 1E/F0 26/F0 25/F0 2E/F0 36/F0 3D/F0 3E/F0 46/F0 45/F0 4E/F0 55/F0 6A/F0 Shift Ctrl Space Number Symbol Make/Break Code 22/F0 21/F0 2A/F0 32/F0 31/F0 3A/F0 41/F0 49/F0 4A/F0 59/F0 14/F0 11/F0 29/F0 11/E0 Make/Break code 6C/E0 32/E0 66/E0 E065/E0 67/E0 68/E0 69/E0 6A/E0 6D/E0 22/E0 24/E0 10/E0 19/E0 30/E0 2E/E0 20/E0 6B/E0 21/E0 26/E0 1E/E0 17/E0 2D/E0 11/E0
Rev. 1.70
June 2008
HT82K628A
Number Symbol **42 **45 Enter Shift Macro Back Space Make/Break Code 66/F0 0D/F0 15/F0 1D/F0 24/F0 2D/F0 2C/F0 35/F0 3C/F0 43/F0 44/F0 4D/F0 54/F0 5B/F0 5D/F0 58/F0 1C/F0 1B/F0 23/F0 2B/F0 34/F0 33/F0 3B/F0 42/F0 4B/F0 4C/F0 52/F0 5D/F0 5A/F0 12/F0 61/F0 1A/F0 Enter Scroll Lock PgUp PgDn Number Symbol Ctrl Lock Home Make/Break Code 14/E0 77/F0 6C/F0 6B/F0 69/F0 75/F0 73/F0 72/F0 70/F0 7C/F0 7D/F0 71/F0 7B/F0 79/F0 6D/F0 5A/E0 76/F0 05/F0 06/F0 04/F0 0C/F0 03/F0 83/F0 0A/F0 01/F0 09/F0 78/F0 07/F0 7E/F0
Caps Lock
*101-Key Keyboard Only **102-Key Keyboard Only
Rev. 1.70
June 2008
HT82K628A
Number Symbol Insert Delete Home PgUp PgDn Base Case Shift+Num When both shift keys held down: number Number Symbol E059 Both Shift 52/E0 Left-Shift Right-Shift Lock
Base
Left-Shift
Right-Shift 4A/E0
4A/E0 4A/E0
When both shift keys held down: number Number Symbol Print Screen
Both Shift 4A/E0
Base 7C/E0 Base
Shift/Ctrl 7C/E0
84/F0 Ctrl
Number Symbol Pause
This typematic, associated scan codes occur make code. Number Function ACPI ACPI ACPI Power Sleep Wake-up
Make/Break code 37/E0 3F/E0 5E/E0
Default Make/Break Make/Break Make/Break
Rev. 1.70
June 2008
HT82K628A
Number Function Brazil Japanese J131 Japanese J132 Japanese J133 Korea KC-L Korea KC-R Make/Break code 51/F0 67/F0 64/F0 13/F0 F1/F2/Make/Break code 48/E0 3A/E0 18/E0 10/E0 20/E0 28/E0 30/E0 38/E0 50/E0 34/E0 3B/E0 15/E0 4D/E0 32/E0 21/E0 23/E0 40/E0 2B/E0 4B/E0 1C/E0 43/E0 22/E0 1D/E0 Default Typematic Make Make Make Make Make
Multimedia Function E-Mail Home Favorites Search Refresh Stop Forward Back Media Play/Pause Stop Prev Track Next Track Volume+ VolumeMute Computer Calculator Screen save Minimize Eject
Rev. 1.70
June 2008
HT82K628A
Code Number **42 **45 Make /Break Code 0E/F0 16/F0 1E/F0 26/F0 25/F0 2E/F0 36/F0 3D/F0 3E/F0 46/F0 45/F0 4E/F0 55/F0 5D/F0 66/F0 15/F0 1D/F0 24/F0 2D/F0 2C/F0 35/F0 3C/F0 43/F0 44/F0 4D/F0 54/F0 5B/F0 5C/F0 14/F0 1C/F0 1B/F0 23/F0 2B/F0 34/F0 33/F0 3B/F0 42/F0 4B/F0 4C/F0 52/F0 53/F0 5A/F0 12/F0 13/F0 1A/F0 22/F0 21/F0 2A/F0 32/F0 31/F0 3A/F0 41/F0 49/F0 Default State Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Make/Break Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Make/Break Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Typematic Number Make /Break Code 4A/F0 59/F0 11/F0 8B/F0 19/F0 29/F0 39/F0 8C/F0 58/F0 67/F0 64/F0 61/F0 6E/F0 65/F0 63/F0 60/F0 6F/F0 6D/F0 6A/F0 76/F0 6C/F0 6B/F0 69/F0 77/F0 75/F0 73/F0 72/F0 70/F0 7E/F0 7D/F0 74/F0 7A/F0 71/F0 84/F0 7C/F0 7B/F0 79/F0 08/F0 07/F0 0F/F0 17/F0 1F/F0 27/F0 2F/F0 37/F0 3F/F0 47/F0 4F/F0 56/F0 5E/F0 57/F0 5F/F0 62/F0 8D/F0 Default State Typematic Make/Break Make/Break Make/Break Make/Break Typematic Make Only Make/Break Make Only Make Only Typematic Typematic Make Only Make Only Typematic Typematic Make Only Make Only Typematic Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Typematic Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Make Only Typematic
*101-Key Keyboard Only **102-Key Keyboard Only
Rev. 1.70
June 2008
HT82K628A
Number Function Brazil Japanese J131 Japanese J132 Japanese J133 Korea KC-L Korea KC-R Make/Break code 51/F0 67/F0 64/F0 13/F0 F1/F2/Default Typematic Make Make Make Make Make
Timing Diagrams
Data Output
itio llin itio ilia ilia
Keyboard Data Input
itio ilia
Rev. 1.70
June 2008
HT82K628A
usage
Status Location Enter F1/F11 F2/F12 F10/ ScrLock /PgUp ®/End Enter PgDn Enter(R) ScrLock Page Page Down Home Lock Home PgUp Lock Enter(R) Lock Enter(L) ScrLock Page Page Down Home Lock
Rev. 1.70
June 2008
HT82K628A
Matrix PAUSE SCROLL LOCK |(\) 7(Home) 9(PgUp) Wake-up Screen Save KC-L Media Computer E-mail Calculator SHIFT-L WIN-L WIN-R Home Page 6(®) 3(PgDn) ENTER-R SHIFT-R Search Back Page Down Forward Home Stop .(Del) BACK 1(End) 0(Ins) \(|) SPACE [({) Vol28 ;(:) ALT-L Vol+ ENTER-L LOCK PgUp HOME F1/F11 Eject F2/F12 Refresh F10/ Scroll KC-R Bkmk ](}) |(\) ALT-R .(>) ,(<) /(?) Mute CAPS LOCK \(-) _(-) PRINT SCREEN POWER Track =(+) Stop |(\) Play/Pause CTRL-R Next Track N-CHG ROMA 6(^) 8(*) 5(%) 7(&) 4($) 3(#) CTRL-L 2(@) 1(!)
SLEEP PgDn
Rev. 1.70
June 2008
HT82K628A
Application Circuits
Note: Select GND: Enable Mini Keyboard Macro Select GND: Disable Macro
Rev. 1.70
June 2008
HT82K628A
Package Information
40-pin (600mil) Outline Dimensions
Symbol
Dimensions Min. 2045 Nom. Max. 2065
Rev. 1.70
June 2008
HT82K628A
48-pin SSOP (300mil) Outline Dimensions
Symbol
Dimensions Min. Nom. Max.
Rev. 1.70
June 2008
HT82K628A
Product Tape Reel Specifications
Reel Dimensions
SSOP Symbol Description Reel Outer Diameter Reel Inner Diameter Spindle Hole Diameter Slit Width Space Between Flange Reel Thickness Dimensions 330±1 100±0.1 13+0.5 -0.2 2±0.5 32.2+0.3 -0.2 38.2±0.2
Rev. 1.70
June 2008
HT82K628A
Carrier Tape Dimensions
SSOP Symbol Description Carrier Tape Width Cavity Pitch Perforation Position Cavity Perforation (Width Direction) Perforation Diameter Cavity Hole Diameter Perforation Pitch Cavity Perforation (Length Direction) Cavity Length Cavity Width Cavity Depth Cavity Depth Carrier Tape Thickness Cover Tape Width Dimensions 32±0.3 16±0.1 1.75±0.1 14.2±0.1 Min. 1.5+0.25 4±0.1 2±0.1 12±0.1 16.2±0.1 2.4±0.1 3.2±0.1 0.35±0.05 25.5
Rev. 1.70
June 2008
HT82K628A
Holtek Semiconductor Inc. (Headquarters) No.3, Creation Science Park, Hsinchu, Taiwan Tel: 886-3-563-1999 Fax: 886-3-563-1189 http://www.holtek.com.tw Holtek Semiconductor Inc. (Taipei Sales Office) 4F-2, 3-2, YuanQu St., Nankang Software Park, Taipei 115, Taiwan Tel: 886-2-2655-7070 Fax: 886-2-2655-7373 Fax: 886-2-2655-7383 (International sales hotline) Holtek Semiconductor Inc. (Shanghai Sales Office) Floor, Building No.889, Shan Rd., Shanghai, China 200233 Tel: 86-21-6485-5560 Fax: 86-21-6485-0313 http://www.holtek.com.cn Holtek Semiconductor Inc. (Shenzhen Sales Office) Unit Productivity Building, Gaoxin 2nd, Middle Zone High-Tech Industrial Park, ShenZhen, China 518057 Tel: 86-755-8616-9908, 86-755-8616-9308 Fax: 86-755-8616-9722 Holtek Semiconductor Inc. (Beijing Sales Office) Suite 1721, Jinyu Tower, A129 West Xuan Street, Xicheng District, Beijing, China 100031 Tel: 86-10-6641-0030, 86-10-6641-7751, 86-10-6641-7752 Fax: 86-10-6641-0125 Holtek Semiconductor Inc. (Chengdu Sales Office) 709, Building Champagne Plaza, No.97 Dongda Street, Chengdu, Sichuan, China 610016 Tel: 86-28-6653-6590 Fax: 86-28-6653-6591 Holtek Semiconductor (USA), Inc. (North America Sales Office) 46729 Fremont Blvd., Fremont, 94538 Tel: 1-510-252-9880 Fax: 1-510-252-9885 http://www.holtek.com
Copyright 2008 HOLTEK SEMICONDUCTOR INC. information appearing this Data Sheet believed accurate time publication. However, Holtek assumes responsibility arising from specifications described. applications mentioned herein used solely purpose illustration Holtek makes warranty representation that such applications will suitable without further modification, recommends products application that present risk human life malfunction otherwise. products authorized critical components life support devices systems. Holtek reserves right alter products without prior notification. most up-to-date information, please visit site http://www.holtek.com.tw.
Rev. 1.70
June 2008

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