USB Programmers Comparison Table:
True USB GQ-4X<->True USB GQ-3X <-> G540<->EasyPRO90B <-> TOP2007/TOP2005+<->VP280/190
Model True USB Willem GQ-4X True USB Willem GQ-3X G540 EasyPRO90B VP280/VP190 TOP2007/2005+
PC Interface/data communication USB USB USB USB USB USB
Power supply USB or AC/DC USB or AC/DC Single AC/DC power adapter Single AC/DC power adapter Single AC/DC power adapter USB or AC/DC power
   
auto detection/switching auto detection/switching
Hardware Developer MCUmall, Canada MCUmall, Canada China China China China 
Software Developer MCUmall, Canada MCUmall, Canada China China China China
Free software updates reqularly reqularly in-reqularily 2 to 3 times/per year in-reqularily in-reqularily in-reqularly
Supported Forum Yes Yes None None None None 
Technical Support Yes Yes   None  None  None None 
Working Stability
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Work with EPROM  
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Support TSOP48 chip Yes Yes No  No  No No
Support PSOP44 chip Yes Yes No No No No
Support TSOP40 chip Yes Yes No No No No
Support 16bit chip Yes Yes No No No No
Support PSOP56 4 AM29BL802CB chip Yes Yes No No No No
Support 87C510 chip Yes Yes No No No No
Support 27c1028 chip Yes Yes No No No No
Support PLCC84 chip Yes Yes No No No No
Multi-tasking CPU usage 10% 10% 40% 20% 20% >98%
Support software O/S Win98SE/Me/XP/NT/2000 Win98SE/Me/XP/NT/2000 Win98SE/Me/XP/NT/2k  Win98SE/Me/XP/NT/2k  Win98SE/Me/XP/NT/2k  Win98SE/Me/XP/NT/2k 
       
Window Vista 32bit 64bit Window Vista 32bit 64bit    
Window7 32bit 64bit Window7 32bit 64bit WindowVista  WindowVista 
Allow User add device on software  Yes Yes No No No No
Device search   Yes Yes Yes Yes No Yes
History memory   Yes Yes No No No No
Status Active Active Active Active Active Active
Manufacturer MCUmall Electronics Inc., Canada MCUmall Electronics Inc., Canada STAGER China     ZLG China      Weilei China    TY China  
             
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