Re: Apple II/II+ Question

[Wayne Stewart <waynes@intergate.ca>]

Bryan Parkoff wrote:
> 
> Apple II/II+ Question
> 
>     I want to understand how II/II+ motherboard look like.  I notice that
> there are 6 or 8 ROM chips beside 6502 CPU chip.  Are ROM chips contained
> Woz's original routines for II and revised routines for II+?  It is always
> clear that there are no Integer BASIC nor Applesoft BASIC in ROM chips
> except slot 0 controller card.
>     It does not make sense to me.  If I don't put slot 0 controller card on
> II+, II+ always returns to AppleSoft BASIC prompt after autostart.  What if
> it will be the same for II.

In a II+ the Monitor ROM is the F8 ROM. The other 5 contain Applesoft Basic.
In the II the F8 is also the Monitor but it's not an autostart. You get 
garbage on your screen when you power up and have to do a reset then a 
Control-B Return to get into basic. In the Apple II Integer basic
resides 
in the F0, E8 and E0 ROMs. D8 & D0 are empty unless you have the
programmers 
ROM.

>     If I use to load Integer BASIC from DOS 3.3 master disk without using
> slot 0 controller card, the error message says: "No language found".  It is
> what I understand that DOS 3.3 master disk has an ability to swap Integer
> BASIC and AppleSoft BASIC into RAM that only starts at $D000 through $F7FF.
> 
> Question:
>     Please tell me where original and revised routines are found in ROM
> chip.  Please label each ROM chips for me.
> 
>     Are there two different slot 0 controller cardss that one is Integer
> BASIC and another one is AppleSoft BASIC?
> 
>     How many memory can II motherboard limit?  How many memory can II+
> motherboard limit?  I assume 4-48K for II and 48K-64K for II+

All II and II+ had a maximum of 48k on the motherboard. Minimum RAM any
II+ 
came with is 16k. With the II it depends, earlier ones came with as
little 
as 4k, later ones had a minimum of 16k.
Slot 0 is almost always used for a 16k card often referred to as a
Language 
card. The 16k card brought the II or II+ up to 64k. It was called a
language 
card because that's where Integer Basic was loaded into in a II+ or
AppleSoft 
was loaded into in a II.
I think you're mistaking the 16k card for a controller card. Apple made
a 
couple of different 16k cards and a few hundred different ones were made
by 
third parties but they all did pretty much the same thing.
Integer Basic was Woz's work
AppleSoft was Microsofts work. Some Applesoft ROMs had the Microsoft 
copyright printed on them.

	Wayne