[sdiy] HMI-200 8051 ICE Ext. Clk

[Tony K]

Hi there folks, time for me to ask for help this time.

I recently revisited my old 8051 music development projects and have never tried using the targets external clock but used the ICE's internal 16 MHz clock. This has been okay for things up to now but for s/w timing loops and such of course this is unacceptable. Basically the problem is the emulator software - and I have the Huntsville DOS , 16 and 32 bit software running on a slow serial port (38400 max) - crashes or times out when I set ext. clk in the configuration page. Always works with it's internal clock.

The test target was the Jupiter-6's own 12 Mhz oscillator which is 'double buffered' before going to the slave voice micros. Another question I had was how do you get these emulators to work with targets that use crystals or ceramic resonators and the internal 8051 oscillator ? It seems that would be obvious oversight. The documentation is of no help.. well maybe a little.

My dev system consists if an MMT-8, an Eprom Emulator and this ICE I acquired recently and had tried it with the MMT-8.

Sorry if any of this is confusing. 
This is am older Huntsville Microsystems 8051 ICE, very powerful but slow (38400 baud) !

Barry if you can chime in here that would be great, thanks everyone.

TK