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projects:pcpointer [2015/03/17 14:20]
darron created 		projects:pcpointer [2022/09/07 12:05] (current)
darron [Resources]
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-==== PC Pointer PS/2 to serial mouse protocol converter ====+==== PC Pointer ==== 
 +<wrap right> 
 +{{:projects:ps2serial.jpg?200|}} 
 +</wrap> 
 + 
 +This is a very simple PS/2 to serial mouse protocol converter which uses 
 +a PIC micro-controller and a MAX232. 
 + 
 +=== Schematics === 
 + 
 +Two schematics are presented for two different PIC micros. It should be trivial to port this application to any other PIC micro-controller since they all share similar peripherals. 
 + 
 +{{:projects:pic16f628a.png?200}} 
 +{{:projects:pic16f688.png?200}} 
 + 
 +=== Install === 
 + 
 +First install [[:tools:gputils|gputils]] for gpasm and [[:projects:pickle|Pickle]] for ICSP (if you are using a Velleman K8048 for example). 
 + 
 +PC Pointer needs some support files from [[:projects:pickle|Pickle]] so we install those first. 
 +<code> 
 +hg clone http://hg.kewl.org/pub/pickles 
 +cd pickles 
 +make 
 +make install 
 +cd .. 
 +</code> 
 + 
 +Now we can fetch PC Pointer and and assemble the code. 
 +<code> 
 +hg clone http://hg.kewl.org/pub/PCPointer 
 +cd PCPointer 
 +make 
 +</code> 
 + 
 +The resultant hex file is used to program the chip. Here I use [[:projects:pickle|Pickle]] and I have targeted the 16f688. 
 +<code> 
 +p14 program pic16f688.hex 
 +</code> 
 + 
 +=== Usage === 
 + 
 +Plug an old PS/2 mouse or newer USB mouse with PS/2 support into the input port of the circuit. Connect the serial output into the RS232 input of your old computer. 
 + 
 +Boot into DOS and detect the mouse with MOUSE.COM 8.20. 
 +<code> 
 +MOUSE.COM /C1 
 +</code> 
 + 
 +Disable it like this. 
 +<code> 
 +MOUSE.COM OFF 
 +</code> 
 + 
 +Windows 95 should auto-detect the device as a generic serial mouse. 
 +=== Resources === 
 + 
 +[[https://web.archive.org/web/20180202174841/http://www.computer-engineering.org:80/ps2protocol/|PS/2 protocol]]