Genesis Address Bus and Max RAM

Shiru · Post by **Shiru** » Mon Dec 17, 2007 1:29 am

HardWareMan wrote:Emulating system hangs, when accessing to forbidden addresses? Useless.

That can be useful for developers who uses emulators to make fast tests of their code.

TmEE co.(TM) · Post by **TmEE co.(TM)** » Tue Dec 18, 2007 6:31 am

Emulating system hangs can be useful, as it will save me lot of trouble finding out why my code doesn't run (if I manage to do some illegal write)...

Eke · Post by **Eke** » Tue Dec 18, 2007 8:58 am

No. Why should I do that? It's simple separated TV sync signals.
PS I made a device, that generate DTACK, when it not activate in 8 VCLK cycles. You can see it here (add-on in center). One binary counter and simple logic IC.

To know the exact cycle count (exprimed in pixel and 68k clocks) for one scanline/one frame... but this is a little off-topic, you're right

Nemesis · Post by **Nemesis** » Mon Jan 07, 2008 5:01 am

Does someone have a copy of that image HardWareMan posted? Link seems to be dead.

HardWareMan · Post by **HardWareMan** » Mon Jan 07, 2008 7:04 am

Nemesis wrote:Does someone have a copy of that image HardWareMan posted? Link seems to be dead.

Fixed.

HardWareMan · Post by **HardWareMan** » Fri Jun 25, 2010 5:23 pm

Jorge Nuno wrote:WOW!! Only the # cycles elapsed between AS and DTACK remaining

ОКе... Here we are:

And little bit closer: