Re: Wonder if we could get BASIC on this

[et472@FreeNet.Carleton.CA (Michael Black)]

Lyrical Nanoha (lyricalnanoha@dosius.ath.cx) writes:
> On Wed, 31 May 2006, aiiadict@gmail.com wrote:
> 
>> Michael J. Mahon wrote:
>>>
>>> David Murray wrote:
>>>> the Apple also stored its text screen
>>>> starting at $400
>>>
>>> It's the first logical place to put a 1KB buffer.
>>>
>>
>> $00 - $FF zero page
>> $100 - $1FF stack
>> $200 - $2FF keyboard buffer
>> $300 - $3FF free space
>>
>> why not $200?  seems logical to me to put it
>> there too?
>>
>> Rich
> 
> It would seem more logical to me personally to put it at the top of RAM 
> (like the PET and the PC).  I think I put it at $B800 on one of my system 
> designs (for a 2K buffer).
> 
> -uso.
But that may complicate things, putting it at the top.  If memory is
expandable, then you have to deal with relocating the video buffer.  And
a lot of those early systems were just using hardware in the video department,
which would require more hardware for relocation.

  Michael