All Rights Reserved. Manual first edition May 20,1998 The information in this document is subject to change without prior notice in order to improve reliability, design and function and does not represent a facturer. In no event will the manufacturer be liable for direct, indirect, special, incidental, or consequential damages arising out of the use or inability to use the product or documentation, even if advised of the possibility of such This document contains proprietary information protected by copyright. All rights are reserved. No part of this manual may be reproduced by any mechanical, electronic, or other means in any form without prior written permission of the manufacturer. ROCKY-558EV is registered trademarks of Acquire Inc.,IBM PC is a registered trademark of International Business Machines Corporation. Intel is a registered trademark of Intel Corporation. AMI is registered trademarks of Megatrends, Inc. Other product names mentioned herein are used for identification purposes only and may be trademarks and/or registered trademarks of their respective companies. American Trademarks damages. commitment on the part of the manu @Copyright 1998 Ethernet SBC Pentium® ,VGA & 10/100Mbps ROCKY-558EV Contents 3 1.1Specifications..............................................................................4 1.2What You Have...........................................................................5 6 2.1.............................................................6 2.2 Setting the CPU of ROCKY-58EV............................................... 8 2.3Watch-Dog Timer...................................................................... 2.4DiskOnChip™ Flash Disk............................................................ 2.5............................................................ 3.1...................................................... 3.2................................................ 3.3Parallel Port............................................................................... 3.4Serial Ports................................................................................ 3.5....................................................... 3.6s............................................... 3.7 USB Port Connector .................................................................. 3.8 IrDA Infrared Interface Port ……….…………… ………………… 17 1 17 16External Switches and Indicator 16Keyboard/Mouse Connector 15 15 14PCI E-IDE Disk Drive Connector 13Floppy Disk Drive Connector 13.........................................................3. Connection 12BIOS Flash Type Setting 11 10 ROCKY-558EV's Layout ............................................................2. Installation ..........................................................1. Introduction 3.9 VGA Connector ………………………………………………………….18 3.10 Lan RJ45 Connector …………………………………….18 3.11 CPU Fan Connector …………………………………….19 3.12 External Battery Connector ……………………………….19 4.1Getting Start.............................................................................. 4.2.............................................................. 4.3............................................................. 4.4............................................................ 4.5....................................................................... 4.6......................................................... 4.7PCI / Plug and Play Setup.......................................................... 2 Appendix A. Watch-Dog Timer 2 29.............................. 27..................................................Key Function5. E 26 25Power Management Setup 24Peripheral Setup 23Advanced Chipset Setup 22Advanced CMOS Setup 21Standard CMOS Setup 20 20.................................................4. AMI BIOS Setup 1 Introduction Welcome to the ROCKY-558EV Pentium® w/ VGA & VARs that want to provide all the performance, reliability, and quality at a reasonable price. This board built-in ™ software utility. The DOC currently is available from 2MB to An advanced high performance VGA chip – Winbond W9970CF SDRAM.and max. 128MB for one module. ’ 1.1 Specifications : 3 which is 100% ISA/PCI compatible chipset with PCI 2.1 standard. ROCKY-558EV uses the advanced ALI Chipset Aladdin 4+ 100MBps Ethernet with auto-sensing function. s RTL8139 network chipset provides 10MBps orThe board sockets for its on-board DRAM. DIMM module is 3.3V In addition, the ROCKY-558EV provides two 168-pin DIMM Video Graphics Accelerator in a single chip. is used in the ROCKY-558EV board. The W9970CF integrated 72MB. disk. User can use any DOS command without any extra application. The DOC Flash Disk is 100% compatible to hard (DOC) Flash Disk for embeddedDiskOnChip manufacturers, integrators, or high performance VGA and Ethernet, designed for the system equipped with high performance Pentium® CPU and advanced 558EV board is an PICMG bus form factor board, which 10/100MBps Ethernet Single Board Computer. The ROCKY- Single Board Computer provides the following specification: · · : PICMG bus, meet PCI 2.1 standard ·DMA channels : 7 ·Interrupt levels : 15 · : ALI Aladdin 4+ · VGA : Winbond W9970CF Resolution : 1024x768,256 color www.winbond.com.tw More information : · Ethernet : Built-in the RTL8139 Chipset IEEE 802.3u 100BASE-TX standard Auto-sensing interface to 10MBps or 100MBps networks Full duplex capability www.realtek.com.tw More information : ·Real-time clock / calendar : backup by industrial Li Battery. . ·RAM memory · ·Ultra DMA/33 IDE Interface : up to two PCI Enhance IDE hard drives. The Ultra DMA/33 IDE can handle data transfer up to 33MB/s. The best of all is that is new technology is compatible with change for customer’s current accessory. ·Floppy disk drive interface : two 2.88 MB, 1.44MB, 1.2MB, 720KB, or 360KB floppy disk drives. · : NS16C550 compatible · 4 Standard/EPP/ECP Parallel Port UARTsTwo high speed Series ports existing ATA-2 IDE specifications. So there is no need to do any : 512KB Pipelined Burst SRAM on boardSecond Cache memory : up to 256MB SDRAM Chipset Bus processor,Cyrix 6x86MX,IDT C6 processor : Pentium® MMX up to 233Mhz, AMD K6 up to 300MHzCPU The ROCKY-558EV Pentium® w/ VGA & 10/100MBps Ethernet ·IrDA port : Support Serial Infrared(SIR) and Amplitude Shift ·USB port : Support USB port for future expansion. ·Watch-dog timer : can be set by 1,2,10,20,110 or 220 seconds trigger the timer. ·Flash Disk - ™ : The Flash Disk provides 100% compatible with hard disk. · ·Mouse : PS/2 Mouse Port on-board. · : +5V @ 5.5A ( Pentium® MMX-200,32MB SDRAM) +12V @ 160mA , -12V@60mA ·Operating Temperature : 0 ° ~ 55 ° 1.2 In addition to this includes the following items: · ·e · · If any of these items is missing or damaged, contact the dealer product in the future. 5 materials and carton in case you want to ship or store the from whom you purchased the product. Save the shipping 6-pin Mini-Din to Keyboard and Mouse Adapter Cable FDD/HDD Cable RS-232/Printer Cabl SBC ROCKY-558EV Pentium® w/ VGA &10/100MBps Ethernet , the ROCKY-558EV package User's Manual What You Have C ( CPU needs Cooler) Power Consumption Keyboard connector DiskOnChip period. Reset or NMI was generated when CPU did not periodically Keyed IR(ASKIR) interface. 2 Installation information that you should be careful is described. The 2.1ROCKY-558EV's Layout < reference next page > 6 and watch dog timer, are also included. configuration, such as CPU type selection, system clock setting, jumpers and switches setting for the ROCKY-558EV's the layout of ROCKY-558EV is shown, and the unpacking This chapter describes how to install the ROCKY-558EV. At first, 7 2.2 Setting the CPU of ROCKY-558EV · CPU Clock Setting : JP3 JP3 JP3 7-8 55MHz CLOSE CLOSE OPEN CLOSE OPEN OPEN 60MHz 66MHz OPEN OPEN OPEN 75MHz OPEN CLOSE CLOSE 83MHz CLOSE OPEN CLOSE · CPU to Bus Multiple : Multiplier JP3 JP3 JP3 1-2 3-4 5-6 1.5 x OPEN OPEN OPEN 2 x CLOSE OPEN OPEN CLOSE CLOSE OPEN 2.5 x 3 x OPEN CLOSE OPEN 3.5 x OPEN OPEN OPEN 4 x CLOSE OPEN CLOSE CLOSE CLOSE CLOSE 4.5 x CPU Frequency = CPU Clock x Multiplier for example · CPU Core Voltage Selection : core and I/O,the I/O is 3.3V but the core is 2.8V. This kind capability. As for the general Pentium® CPU is one voltage for I/O and Core - 3.3V,3.4V,or 3.5V CPU Core Voltage Setting : · 8 JP4 of CPU design will enhance the low power consumption CPU. Right now new Intel MMX CPU is dual voltages for Please check the CPU Core Voltage before you install the Pentium® 200MHz = 66MHz CPU Clock x 3 11-12 9-10 CPU Speed/Clock JP4 JP4 JP4 JP4 Voltage 1-2 3-4 5-6 7-8 CLOSE CLOSE CLOSE CLOSE VRE OPEN CLOSE CLOSE CLOSE STD 3.3V CLOSE OPEN CLOSE CLOSE 3.2V OPEN OPEN CLOSE CLOSE 3.1V CLOSE CLOSE OPEN CLOSE 3.0V OPEN CLOSE OPEN CLOSE 2.9V CLOSE OPEN OPEN CLOSE 2.8V (P55C) OPEN OPEN OPEN CLOSE 2.7V CLOSE CLOSE CLOSE OPEN 2.6V OPEN CLOSE CLOSE OPEN 2.5V CLOSE OPEN CLOSE OPEN 2.4V OPEN OPEN CLOSE OPEN 2.3V CLOSE CLOSE OPEN OPEN 2.2V OPEN CLOSE OPEN OPEN 2.1V CLOSE OPEN OPEN OPEN OPEN OPEN OPEN OPEN 2.0V · JP1/JP2 Dual / Single CPU Voltage setting : Vcore & VIO JP1 JP1 JP2 JP2 1-2 3-4 1-2 3-4 Pentium OPEN OPEN CLOSE IDT C6 Pentium MMX CLOSE CLOSE OPEN OPEN Dual Voltage · Cyrix 6x86MX PR Rating Table 9 Cyrix 6x86MX AMD K6 (P54C) CLOSE 3.4V(P54C/CS) 3.5V(P54C/CS) CPU Core (Vcore : 2.9V ,dual voltage) PR Rating Bus MHz Clock MHz Multiplier AMD K6 MMX Rating Table(Dual Voltage) · Multiplier 3.2V 2.9V 2.9V 2.2V 2.2V 2.2V 2.3 Watch-Dog Timer signal to start again, or activate NMI to CPU. The Watch-Dog · JP7 : Watch-Dog Active Type Setting JP7DESCRIPTION 10 Timer is disable by reading port 043H. assume the program operation is abnormal and will issue a reset be triggered before the time-out period ends, otherwise it will The Watch-Dog Timer is enabled by reading port 443H. It should 3.5x 66 233MHzK6-233 model 7 4x 66 266MHzK6-266 model 7 4.5x 66 300MHzK6-300 model 7 2.5x 66 166MHzK6-166 model 6 3x 66 200MHzK6-200 model 6 3.5x 66 233MHzK6-233 model 6 Bus MHzVcoreFreqCore Product Name 2.5x 208 83 6x86MX-PR266 3x 225 75 6x86MX-PR266 3.5x 233 66 6x86MX-PR266 2x 166 83 6x86MX-PR233 3x 200 66 6x86MX-PR233 2.5x 188 75 6x86MX-PR233 3x 180 60 6x86MX-PR200 2.5x 166 66 6x86MX-PR200 2x 150 75 6x86MX-PR200 2.5x 150 60 6x86MX-PR166 2x 133 66 6x86MX-PR166 2x 120 60 6x86MX-PR150 CPU Core 2-3RESET WHEN WDT TIME-OUT 1-2ACTIVATE NMI TO CPU WHEN WDT TIME- OUT DISABLE WDT OPEN · JP8: WDT Time-Out Period PERIOD 1-2 3-4 5-6 7-8 OPEN OPEN CLOSE OPEN 1 sec. 2 sec. OPEN OPEN CLOSE CLOSE 10 sec. OPEN CLOSE OPEN OPEN 20 sec. OPEN CLOSE OPEN CLOSE CLOSE OPEN OPEN OPEN CLOSE OPEN OPEN CLOSE 2.4 ™ Flash Disk The ™ ‘t need any extra software utility. It is just “ and ”,easy and reliable. Right now the DOC is available from 2MB to 72MB.The MD-2200-xMB series DOC will share only 8KB memory address. · JP9 Address 1-2– CFFFF 3-4– D7FFF – DFFFF 5-6 11 DE000 D6000 CE000 DiskOnChip Memory Address Setting JP9 : play plug DOC.Customer don Systems. Because the DOC is 100% compatible to hard disk and Flash Disk Chip(DOC) is produced by M-DiskOnChip DiskOnChip 220 sec. 110 sec. 2.5 BIOS Flash Type Setting There have 12V or 5V programming Flash and 1MB or 2MB flash a specified jumper setting. JP6: BIOS Flash Type Setting · This jumper is by factory setting JP6 DESCRIPTION 1-312V programming 1MB 2-4 5V programming 3-5 1MB 2-4 12V programming 1-3 2MB 4-6 5V programming 3-5 2MB 4-6 12 BIOS possible to be used in the board. And each type flash need 3 Connection 3.1Floppy Disk Drive Connector J7 : FDC CONNECTOR · 1GROUND2REDUCE WRITE 3GROUND4N/C 5GROUND6N/C 7GROUND8 9GROUNDMOTOR ENABLE A# GROUNDDRIVE SELECT B# GROUNDDRIVE SELECT A# GROUNDMOTOR ENABLE B# GROUNDDIRECTION# GROUNDSTEP# GROUNDWRITE DATA# GROUNDWRITE GATE# GROUNDTRACK 0# GROUNDWRITE PROTECT# GROUNDREAD DATA# GROUND GROUNDDISK CHANGE# 13 3433 SIDE 1 SELECT#3231 3029 2827 2625 2423 2221 2019 1817 1615 1413 1211 10 INDEX# DESCRIPTIONPIN NO.DESCRIPTIONPIN NO. connector cable. ROCKY-558EV board equipped with a 34-pin daisy-chain driver indicators to the ROCKY-558EV board. This chapter describes how to connect peripherals, switches and 3.2 You can attach four IDE( Integrated Device Electronics) hard disk drives to the ROCKY-558EV IDE controller. interface. · J6 : Secondary IDE Interface Connector PIN NO.DESCRIPTIONPIN NO.DESCRIPTION 1RESET#2GROUND 3DATA 74DATA 8 5DATA 66DATA 9 7DATA 58DATA 10 9DATA 4DATA 11 DATA 3DATA 12 DATA 2DATA 13 DATA 1DATA 14 DATA 0DATA 15 GROUNDN/C IDE DRQGROUND IOW#GROUND GROUND GROUND IDE DACKGROUND - DEFAULT INTERRUPTNC N/C HDD ACTIVE#GROUND 14 4039 HDC CS1#38HDC CS0#37 SA236SA035 34SA133 3231 3029 28IDE CHRDY27 26IOR#25 2423 2221 2019 1817 1615 1413 1211 10 J5 : Primary IDE Interface Connector Please note the IDE support Ultra DMA/33 high performance PCI E-IDE Disk Drive Connector 3.3 Parallel Port · J9 : Parallel Port Connector PIN NO.DESCRIPTIONPIN NO.DESCRIPTION 1STROBE#2DATA 0 3DATA 14DATA 2 5DATA 36DATA 4 7DATA 58DATA 6 9DATA 7ACKNOWLEDGE PRINTER SELECTAUTO FORM FEED # ERROR# PRINTER SELECT LN#GROUND GROUNDGROUND GROUNDGROUND GROUNDGROUND GROUNDN/C 3.4Serial Ports · PIN NO.DESCRIPTION 1DATA CARRIER DETECT (DCD) 2 3 4DATA TERMINAL READY (DTR) 5 6 7REQUEST TO SEND (RTS) 8 9 · 15 J13 : Serial Port 10-pin Header( COMB) RING INDICATOR (RI) CLEAR TO SEND (CTS) DATA SET READY (DSR) GROUND (GND) TRANSMIT DATA (TXD) RECEIVE DATA (RXD) J15 : Serial Port DB-9 Connector( COMA ) UARTs with Read/Receive 16 byte FIFO serial ports. The ROCKY-558EV offers two high speed NS16C550 compatible 2625 2423 2221 2019 1817 INITIALIZE1615 1413 PAPER EMPTY12BUSY11 10 J9. an on-board parallel port, accessed through a 26-pin flat-cable connector This port is usually connected to a printer, The ROCKY-558EV includes 3.5Keyboard/Mouse Connector · PIN NO.DESCRIPTION 1 2KEYBOARD DATA 3N/C 4GROUND 5 · J14 : 5-pin Header Mouse Connector PIN NO.DESCRIPTION 1MOUSE DATA 2N/C 3GROUND 4 5MOUSE CLOCK · J16 : 6-pin Mini-DIN Keyboard / Mouse Connector PIN NO.DESCRIPTION 1KEYBOARD DATA 2MOUSE DATA 3GROUND 4 5 6MOUSE CLOCK 3.6 External Switches and Indicators 16 KEYBOARD CLOCK +5V +5V +5V KEYBOARD CLOCK J1 : 5-pin Header Keyboard Connector on the bracket and board each. The ROCKY-558EV provides keyboard and mouse connectors NC 10 GND 5 RI 9 DTR 4 CTS 8 TXD 3 RTS 7 RXD 2 DSR 6. DCD 1 Description Pin No. DescriptionPin No. · NC NC GND NC GND RESET GND GND NC GND 3.7 USB Port Connector · J8 : USB Connector -DATA1 +DATA1 -DATA0 GND 3.8 The ROCKY-558EV built-in a Infrared(SIR) or Amplitude Shift Keyed IR(ASKIR) interface. IrDA port have to set SIR or ASKIR model in the BIOS’’ · PIN NO.DESCRIPTION 17 IrDA connector JP10 : COM2 will be disabled. s COM2. Then the normal RS-232s Peripheral Setup When use the IrDA port which support Serial IrDA Infrared Interface Port 5V 8. 7. 6. 5. +DATA0 4. 3. GND 2. 5V 1 I/O bus expansion. The ROCKY-558EV built-in dual USB ports for the future new 19. 5V Standby 20. Switch Control Signal 17. 5V Standby 18. 5V 15. Suspend Control 16. HDD LED 13. 14. 11. 12. 9. 10. 5V 7. KEYLOCK 8. 5 6 3. 4. Speaker Signal 1. 5V 2 J2 : General Connectors and controlling your CPU board. There are many external switches and indicators for monitoring 1VCC 2NC 3 4 5 The ROCKY-558EV built-in 15-pin VGA connector directly to your CRT monitor. · J11 : 15-pin Female Connector 1RED2GREEN 34NC 5GROUND6GROUND 7GROUND8GROUND 9NCGROUND NCDDC DAT DDCCLK 3.10 Lan RJ45 Connector · 1NC 2 NC NCNC · CN1 LED Connector(2-pin header) for Lan 3.11 CPU Fan Connector The ROCKY-558EV provides a connector for CPU cooling fan. . 18 Active 6. 5V 5. 100Mbps 4. 5V 3. 10Mbps 2. 5V 1. 8. 4. 7.RX+ 3. RX-6.TX- 5.TX+ Lan RJ45 Connector J12 : Lan connector..The ROCKY-558EV built-in a RJ45 15 VSYNC14HSYNC13 1211 10 BLUE 3.9 VGA Connector IR-TX Ground IR-RX · J10 CPU Fan Connector GND 3.12 External Battery Connector The ROCKY-558EV built-in a 3V/850mAH industrial for CMOS and RTC backup. When normal operation will not · PIN NO.DESCRIPTION 1 2 NC 3 4 Please note the J4 pin 2-3 should be short for the internal battery operation. 4 19 Ground N/C External Battery + J4 : External Battery Connector need external battery to backup the data. Li-battery 3. 12V 2. N/C 1. provide maximum flexibility in configuring the system by offering 4.1 Getting Start test and initialization and system configuration verification. After " Hit DEL if you want to run SETUP" following screen will be displayed at this time. Auto Configuration with Fail Safe Settings will load the minimized settings for Troubleshooting. The Auto Configuration with Optimal Settings will will modify all applicable settings. 20 load optimized defaults for regular use. Choosing this setting, When choose performance should be very poor when use this setting. When choose To access AMI HIFLEX SETUP UTILITY, press key. The appears : the POST routines are completed, the following message Self-Test routines. These routines will be executed for system When power on the system, the BIOS will enter the Power-On- usage of these features. requirements. This chapter is written to assist you in the proper various options which may be selected for end-user configuration. The AMI BIOS setup program is designed to The ROCKY-558EV uses the AMI PCI/ISA BIOS for system AMI BIOS Setup 4.2 Standard CMOS Setup configuration. The main function is for Date/Time setting and Floppy/Hard Disk Drive setting. Please refer the following screen For IDE hard disk drive Use the IDE HDD AUTO DETECTION in the main menu to automatically enter the drive specifications. 21 2. bootup.Use the Auto setting for detection during 1. setup procedure, possible setup,please check the following for this setup. The Standard CMOS Setup is used for basic hardware system Manually enter the specifications by yourself from ”“ option. ‘ best performance of the ROCKY-558EV board. As for normal ‘t have to change any default setting. The default setting is pre-set for most reliable operation. 22 operation customers don s tuningThis BIOS Features Setup is designed for customer 4.3 Advanced CMOS Setup Userthe 3. 4.4 Advanced Chipset Setup ‘ 23 be running unstable. carefully change any default setting ,otherwise the system could s registers. PleaseChipSetoptions are used to change the ChipSet TheseThis setup functions are almost working for 4.5 Peripheral Setup This setup is almost working for Multi-I/O Chip(in ALI Aladdin 4+ ‘ to meet your application need perfectly. The only special Serial Port2. If you are using the IrDA port,you have to set this 24 port accordingly. concern is Onboard s registers. Please carefully change any default settingChipSet system chipset ). These options are used to change the 4.6 Power Management Setup ‘“” the video display and hard disk to save energy for example. The brief inactivity period. ) have to be DEVICE=C:\DOS\POWER.EXE in your CONFIG.SYS Under Windows 3.x and Windows 95,you have to install “” Will appear in the “” 25 Control Panel Powerlabeled Windows with APM feature. A battery and power cord icon Under DOS environment, you need to add enters suspend mode activated by the Power Management. installed to keep the system time updated when the computer Note : Advanced Power Management(APM Enable APM puts the system into power saving mode after a Power Management/APM : Disable or Enable power management setup screen is as following, function. The features could shut downgreens 558EV board Power Management Setup help user handles the ROCKY- ‘“” function. All PCI bus slots on the system use INTA#, thus all installed PCI slots must be set to this value. 5 26 PCIs 558EV board The PCI / Plug and Play Setup help user handles the ROCKY- 4.7 PCI / Plug and Play Setup 2 E Key™ Function 2 ™ function 2 ™ you could free to store the ID Code, Pass Word, or Critical Data in the 1Kbit EEPROM. Because the EEPROM is nonvolatile memory, you ’t have to worry the losing of the very important data. 2 Basically the E™ 2 ™ you should have the utility in the package. The software utility will include four files as follows, E2KEY.OBJ EKEYDEMO.C EKEYDEMO.EXE. The E2KEY.OBJ provides two library function for user to 2 integrate their application with E™ function. These library are written and compiled in C format. Please check the following statement, then you will know how to implement it easily. unsigned 2 /* This function will return the E™’ void write_e2key(unsigned int address,unsigned data) 2 /* This function will write the given data to E™ The address range is from 0 to 63. The data value is from 0 to 0xffff. */ 27 at address.KEY address range is from 0 to 63. Return data is one word,16 bits */ s data at address. TheKEY int address)int read_e2key(unsigned (read_e2key and write_e2key) KEY README.DOC KEYWhen you start to use the E write) each word at any time. configured to 64 words(from 0 to 63). You could access(read or is based on a 1Kbit EEPROM which isKEY don KEYfor system integrator. Based on the E KEYThe ROCKY-558EV provides an outstanding E EKEYDEMO.C code at first. 2 ™ ’ Appendix A. Watch-Dog Timer The Watch-Dog Timer is provided to ensure that standalone 28 caused the CPU to crash. This condition may have occurred by systems can always recover from catastrophic conditions that port, otherwise will be not working. s parallelparallel port. So you should enable the ROCKY-558EV function is based on the working ofKEYPlease note the E To easy start to use the function, please refer the include maskable interrupt (NMI) to bring the The Watch-Dog Timer is controlled by two I/O ports. Enable the refresh the Watch-Dog (hex)Timer. Disable the Watch-Dog Timer. (hex) To enable the Watch-Dog Timer, a read from I/O port 443H must be performed. This will enable and activate the countdown timer which will eventually time out and either reset the CPU or this reset condition does not occur, the Watch-Dog Timer must A tolerance of at least 30% must be maintained to avoid disk I/O that can be very time consuming. Therefore if the time 29 Dog Timer, otherwise the system will reset. Note: when exiting a program it is necessary to disable the Watch- be read within 7 seconds. out period has been set to 10 seconds, the I/O port 443H must unknown routines within the operating system (DOS), such as jumper group JP8. This must be done within the time out period that is selected by be periodically refreshed by reading the same I/O port 433H. cause an NMI depending on the setting of JP7. To ensure that Read043 Read443 system back to a known state. reset (cold boot) or a non- correctly, hardware on the board will either perform a hardware external EMI or a software bug. When the CPU stops working