Re: Hopefully last dumb newbie question.

[spec@vax2.concordia.ca (Mitchell Spector)]

In article PAYSlick_RCBD@hotmail.com writes...

>Mitchell Spector wrote:
> 
>>     Another nice feature about the ROM 3 IIgs is there is hardware
>> shadowing for text page 2 built-in. If you run a program that uses
>> it (example: joystick calibration in Goonies) it will automatically
>> activate, and it doesn't slow down the computer. In that sense the
>> ROM 3 is more compatible with 8-bit software.
>> 
>> >If an 8 bit program crashes or doesn't run correctly, try enabling the
>> >Alternate Display mode and try it again.  It just might work.
>> 
>>     Usually you'll see a screen filled entirely with the number "2".
>> I'm not sure if this is a coincidence or Apple had it purposely used
>> to give a hint to the user, instead of random garbage on the screen. :)
>
>If it is automatic, why is the Alternate Display Mode DA still in the
>CDA menu of a ROM 3? Also, my Pacman still had the screen filled with
>2's when I brought the disk over to my old friend's house. When I
>activated the DA, they went away the same as on my ROM 1.

    Good question. I always thought it was there to disable hardware
shadowing, but apparently it functions the same way as on the ROM 00
and 01 machine -- you manually have to activate. I've been going by
how my ROM 3 acts as the norm.

    My ROM 3 board and a few others are slightly different, the 
programmer CDA's are *always* present in the Classic Desk Menu,
and all conventional methods of removal will not work (it has
something to do with the state of certain RAM chips when you
cold-boot the machine). 

    It looks as though another side affect of my particular ROM 3
is Alternative Display Mode, by default, is always set to 'on' 
and cannot be disabled. I'm not sure if this can affect my system
in any negative way (the CDA's being locked in are just annoying
mostly, since the couple of bytes of memory they use up aren't
anything to worry about). At least the hardware shadowing doesn't
slow down my system.

Mitchell Spector
spec@vax2.concordia.ca