Re: Drivers for SVA Apple Disk Controller

["Frank Townsend" <ftownsen@iamdigex.net>]

Michael:


Thanks for your advice!


The SVA card is in Slot 7, and so far, a C700L lists what looks like valid
assembler code.

So I tried to save this to disk with the following (which I'm not quite sure
is correct).

Assuming that a 2708 EPROM contains 1024 bytes:

CALL-151
C007:0
1100<C700.CB00M
C006:0
BSAVE ROM,A$1100,L$1500

I modeled this on a code snippet used to copy a IIe ROM, and admit I'm not
quite sure why C007 and C006 are zeroed.

Does this look right?

TIA,


Frank

"Michael J. Mahon" <mjmahon@aol.com> wrote in message
20011217134611.28788.00000961@mb-fc.aol.com">news:20011217134611.28788.00000961@mb-fc.aol.com...
> Frank Townsend wrote:
>
> >I can certainly check if it has an on-board ROM.
> >
> >Now, how do I do that> :)
>
> There are two ways to proceed:  physical inspection or software
inspection.
>
> To check physically, look for a large IC (probably 24-pin) located "near"
the
> section of the board which has the contact fingers that plug into the
slot.
> If it is an EPROM, it will have a small quartz window, usually covered by
> a piece of tape with some version ID, copyright, etc.
>
> To check in software, get into the Apple II monitor in your favorite way
> (CALL -151 is traditional from Applesoft).  Note which slot your card
> is in--say, 5 for example.  Then type C500L.  The screen should fill
> with 20 lines of 1) gobbledegook with lots of "A0"s mixed in on the
> left hand column, or 2) valid assembly code.  If the latter, then the
> code resides in the "slot ROM" of slot 5 (in this example).  If you get
> garbage assembly code with lots of "A0"s in it, then there is no slot
> ROM, and the monitor is disassembling "vapor" left on the bus by
> the video refresh, which typically contains a lot of blanks (ASCII $A0).
>
> -michael
>
>  Email:  mjmahon@aol.com
>  Home page:  http://members.aol.com/MJMahon/