RS232 comms - need help with datasheet

[malc-c]

Guys thanks very much for your quick input

I have a hardware file which is then included in the main program. The config settings are

ASM  
  __CONFIG    _CONFIG1H, _OSC_HSPLL_1H
  __CONFIG    _CONFIG2L, _PWRT_ON_2L  
  __CONFIG    _CONFIG2H, _WDT_ON_2H & _WDTPS_512_2H
  __CONFIG    _CONFIG3H, _PBADEN_OFF_3H
  __CONFIG    _CONFIG4L, _LVP_OFF_4L & _XINST_OFF_4L
ENDASM
DEFINE  OSC 48
'DEFINE  OSC 20  ; config settings 18F4580, 10mhz crystal
ADCON1 = $0F

I don't have a 12 Mhz crystal at the moment, but have tried with a 10Mhz one and the slowness is causing other issues with timings of the PID loops etc, I also don't get any hieroglyphics, but I only get a blank screen with a flashing cursor. So I'll pop down and get a few 12Mhz xtals from a local component suppliers and see what that does, as I really need to run this PIC as fast as it goes, and would like to resolve the comms issue.

Thanks once again for your input,

Sorry noticed I hadn't changed the OSC value

OK tried this with a 10Mhz xtal, but still no joy - and is seems as slow

ASM  
  __CONFIG    _CONFIG1H, _OSC_HSPLL_1H
  __CONFIG    _CONFIG2L, _PWRT_ON_2L  
  __CONFIG    _CONFIG2H, _WDT_ON_2H & _WDTPS_512_2H
  __CONFIG    _CONFIG3H, _PBADEN_OFF_3H
  __CONFIG    _CONFIG4L, _LVP_OFF_4L & _XINST_OFF_4L
ENDASM
'DEFINE  OSC 48
DEFINE  OSC 40  ; config settings 18F4580, 10mhz crystal
ADCON1 = $0F

Will try the 12mhz xtal when I get one