290 Mbytes of code for an ide/compiler/simulator for the freescale HC08, I was playing with that over the weekend and it tries to combine some ideas about methods and classes from C++ in the handling of the various i/o blocks, and has event handlers interrupts which it calls 'embedded beans'
you can plug in ecternal components to a certain degree but only predefined ones.
To get the ISP to work on those things you have to wait until there is a full moon,stand in a bucket of chicken livers with your trousers rolled up and pay homage to the dark one while sacrificing your next door neibours first born.