Re: Hardware emulation of 6509 using 6502?

From: Michał Pleban <*lists_at_michau.name*> Date: Mon, 05 Mar 2018 13:26:58 +0100 Message-ID: <5A9D3792.4000509@michau.name> · lists_at_michau.name

Hello!

Jim Brain wrote:

> 1) set high nybble of $0/$1 as $f on read
> 2) set high nybble of $0/$1 as $0 on read
> 3) send unused bank on $0/$1 read, with high nybble of $0/$1 as $f
> 4) send unused bank on $0/$1 read, with high nybble of $0/$1 as $0

But I presume that with the current PCB you still read both from the
latch in the CPLD and the RAM?

Do my tests fail when you set unused bank $E?

Regards,
Michau

       Message was sent through the cbm-hackers mailing list