NVIDIA M9207
Silicon Labs
C8051F91
First posted
Thursday June 10, 2010 11:09
Updated
Monday December 6, 2010 19:04
8051 family embedded controller forth book DOES NOT
need to be updated to Windows VB terminal/disk app, C api, C++ wdm driver, and
USB 2.0.
Tweaking required on the PC side.
Monday June 28, 2010 09:44
Operation of the DOS window
under Windows 7 was checked on a machine at Office Depot.
Either go to
All Programs | Accessories point to the DOS window icon double click. Or find
Run and type 'cmd exe'.
Ativa and other
serial USB 2.0 cables using the Prolific chip solved the problem, we
think.
|
Go to start|Run and type cmd exe
To get out type 'exit'.
Now
we can focus on ExpressSCH and ExpressPCB Forth machines hosted by 8051 cores
and maybe ARM cores in the near future.
Than Java and Dalvik VM
implementations on cores that run fig Forth.
Forth86 has the purposes to
host: 1 the Nautilus II metacompiler which is used to metacompile the Forth86
and 8061 targets 2 host PCASSEMBLER®.
The assemblers use <BUILDS
DOES> which the Nautilus I metacompiler would not process.
Assemblers were metacompiled and ROMed in the early 1980s through the
late 1990s. That is why we needed the Nautilius II. With fast machines an
Forth51 operating out of RAM, the assmbler can be compiled obviating the need
for the metacompiler to processes <BUILD DOES>.
In the DOS window
type 'help' to see.
 |
We discovered USB to serial converters [Ativa] and cmd exe still
works!
We have to check out if cmd exe
So we're off on really mertiorius projects like 8051 Expresspcb machines
and even possibly the port of 8051 Forth to Kinetis
50-60 estimated person years of work is in that
book.
8051 family Forth has several advantages:
1 Some, not all, software can be written and debugged
at about an order of magnitude faster than other technologies.
Reasons
are that Forth hosts both an incremental interactive and batch compiler and
assembler.
Forth is an operating system written in Forth and Forth
assembler.
2 Forth, in pactice, is about an order of magnitude more
reliable [doesn't crash] compared to other software technolgies.
3 The
operating system is generated using a metacompiler.
4 It's in the public
domain.
5 ecf51 [embedded controller forth for the 8051 family] is, we
think, without question the best solution to debug hardware. Debug is done
interactively from a PC keyboard. Then forth 'words' are compiled/assembled to
test the hardware at 'high speed.' Test results are print to the screen or disk
file.
|
bill
bio
NVIDIA M9207 usies a slow 8051.
Built-in High-performance Microcontroller 8051 Engine
12MHz clock rate
Four clocks per instruction cycle
Two UARTS
12MHz 8051 operation
We like one clock per most instruction 80C51 variants - with
high clock speeds, of course.
http://www.digikey.com
Page 17 comment about Princeton [Von Neumann] and
Harvard architecture in 8051 family requires comment in our world of large
ram.
We have designed 8051 family hardware to
copy from EPROM, EEPROM, flash, internal memory, ... into ram on boot up, then
operate subsequently entirely out of ram from there on.
But our designs
allow reboot from non-volitile memory.
Design uses the Princeton
architecture to boot from external static memory containing the operating
system.
The operating system is copied from static memory into
non-volitile ram, in this case. Then, under software control, the static memory
is disabled and all fetches and stores are directed to ram.
If the
operating system is stored in 8051 internal memory, then it is copied using the
Harvard architecture, into ram then -PSEN is directed to ram under software
control.
We use Expresspcb to implement our surface mount
designs.
We learned on December 6, 2010 that Simtek went
bankrupt. We're happy we didn't go to boards.
We used the
Netchip 2270 for USB 2.0.
Other projects caused our USB 2.0 to be shelved.
But
with better memory and USB 2.0 technology, it may be time to restart our 8051
family USB 2.0 Windows app interface project?
Harvard Architechture Requiem.
Download schematics
and Netchip layout to view with
ExpressSCH and ExpressPCB.
nvforth.sch
nv2270forth.sch
nv2272forth.sch
2270daughter.sch
2272daughter.pcb
Example:
Save in a new directory, say, nvforth. |
All download problems fixed once we googled and found out how
download to run .com files.
Embedded Controller Forth for the 8051 family source code and
documentation page.
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