Re: Update on Apple II rev 0 replica kits

["Bryan Parkoff" <nospam@nospam.com>]

Mike,

> Correct - rev0 - only 4 colors in hi res mode, no built in reset (although 
> disk II controllers have a reset circuit).  24K memory bug, etc.

    Can you please describe what RESET look like?  For example, you turn on 
the power supply.  The screen should be frozen showing 16 colored LO-RES 
blocks.  MPU might operate without initializing all internal registers.  You 
press RESET key manually every time after you turned on.  Then, monitor 
prompt comes back to normal.  The LO-RES screen will be switched to TEXT 
screen.  Is it the way how the procedure goes?

    Can you please list all bugs from original Apple II rev 0's motherboard? 
I am curious to know.

    I suppose that Apple II rev 0 only has 4 KB RAM.  Integer BASIC can be 
written to manipulate LO-RES / TEXT screen, but it is limited to 2 KB RAM. 
Other 2 KB RAM is used for zero page, stack page, buffer page, and TEXT / 
LO-RES page.
    I guess that earliest games were released with LO-RES screen until 
people could afford to buy extra 4 KB RAM or 16 KB RAM.  With 16 KB RAM, 
they were able to write first page of HI-RES.

> I don't supply power supplies, case and keyboards as they can be easily 
> obtained from an inexpensive apple II plus.

    I thought that original Apple II rev 0's keyboard and Apple II Plus' 
keyboard are different design, but they operated the same.  Is Apple Plus' 
keyboard compatible to Apple II rev 0?

Bryan Parkoff