Re: CBM softwarez - let's solve the soft-rom mystery.

From: Ethan Dicks <ethan.dicks_at_gmail.com>
Date: Mon, 5 Mar 2018 16:14:27 -0500
Message-ID: <CAALmimkGoe+_xJz8XMNoZgFTyH=7bWhvUnNSzxXoitUxZey1Qg@mail.gmail.com>
On Mon, Mar 5, 2018 at 9:14 AM, Nils Eilers <nils.eilers@gmx.de> wrote:
>> Do you know the significance of poking address 634 as I've explained in my
>> example?
>
> Address 634 is located somewhere in RAM, in the BASIC program area. This doesn't sound like a universal address to be used with all sorts of software.

634 ($027A) is the first byte in Tape Buffer #1.  Perhaps it's being
used as a flag?

> With my SoftROM hardware, a write protection can get enabled if and only if a 28C64 EEPROM chip is used.

Handy I just ran across a couple 28C64s in my stack of ICs.  I also
happen to have several X2864s.  Lots.

-ethan

       Message was sent through the cbm-hackers mailing list
Received on 2018-03-05 23:04:55

Archive generated by hypermail 2.2.0.