deraadt@enme.UCalgary.CA (Theo de Raadt) (05/18/89)
I am in need of proper documentation for accessing the OKI chip on the Amiga 2000 or 500. Looking in the A500/A2000 Technical Reference Manual, I find some documentation on the chip, conflicting in some cases. The section on the chip, says the base address is $dc0000. Looking at the PAL equations a little later on in the book, I read that the chip maps into $d80000 - $d8ffff. Nice going guys. Which is it? It appears that the chip maps into long words, reading and writing the lowest nybble of the word. Is this right? Ie. register 5 is at base_address + 5*4.. right? What is this that I read about overlap between the custom graphics chip registers and the RTC? If the chip is at $d80000 - $d8ffff then there is no overlap, is there? Or do the graphics chips go down below $dff000 much? This is for Minix.. and also so that I can write a little program for myself to clear the test and stop bits - I hate when that happens and the clock does not work; that is what the problem is, right? Enough "right?" for tonight... <tdr. Theo A. de Raadt - CPSC student Calgary, Alberta, Canada