Re: Power Up - Conversion From Older Forth

From: Mark Ham <mark_at_menlosoftware.net>
Date: Fri, 16 Apr 2004 11:02:27 -0600

Kevin,

I am a newbie to this architecture but the only thing I can find
is something that states Forth, Inc. and the newer environment is
polyFORTH ISD-4 Cf80186/Pmsd. In the older environment the cells are 8
bit (after 32k they produce negative values when doing a ".") and in the
newer environment they are 16.

I found something in the "polyFORTH ISD-4 chipFORTH CPU
Supplement Cf80186/pMSD) section 2.4.2 Power Up Actions that states
"When the target system powers up, the processor begins executing at the
address FFFF0h". This is what I am trying to confirm.

I am on an embedded processor. I am working the code on a PC
and transferring it to the processor using a Dataman S4.

Thanks for the help Kevin,

Mark

-----Original Message-----
From: sftalk-bounce_at_forth.com [mailto:sftalk-bounce_at_forth.com] On Behalf
Of Appert, Kevin
Sent: Friday, April 16, 2004 10:43 AM
To: sftalk_at_forth.com
Subject: [sftalk] Re: Power Up - Conversion From Older Forth

Short answer - it depends on the hardware.

What Forth were you using before you converted?
What Forth are you using? Are you sure it's PolyForth that you're
porting TO?

Are you on a PC or some embedded processor or what?
How does the 65520 play into this (do you mean the 65520 Graphics
Accelerator?)
Or did you mean Hex FFF0 (Decimal 65520) ?

Note that I am not an employee or representative of Forth, Inc. nor do I
play one television.

-----Original Message-----
From: sftalk-bounce_at_forth.com [mailto:sftalk-bounce_at_forth.com]On Behalf
Of Mark Ham
Sent: Friday, April 16, 2004 9:02 AM
To: sftalk_at_forth.com
Subject: [sftalk] Power Up - Conversion From Older Forth

I am working with an older version of Forth and just moved over to
polyFORTH. The layout of the module is:

0 - 24k screens for the device
24k - 64k actual PROM program code

When the device using this PROM turns on, does it start execution at
address FFFF0 (65520)?

Thanks in advance,

Mark

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