Fear and Loathing in Reverse Polish 
Author Message
 Fear and Loathing in Reverse Polish

I seem to have innocently started a discussion which is getting deeper
and deeper into postscript cracker technology, such as ROM monitors,
Superexec mode, the SNOOP command, and error-handling Trojan horses!
(Its going to take me some time to figure out the lingo; The last
trap-door I opened was APL/360 "I-beams".) After discovering that the
guy who wrote the TV Typewriter Cookbook is into deep reverse (polish)
engineering, I'm sure that Captain Crunch himself will soon join the fray!

Two good points were made alone the way:

1) Modern Laser printers (other than NeXT's) contain good computing
cycles which are just often sitting idle and could be harnessed for
useful things like computing PI, or 300dpi Mandelbrot displays;
Hopefully the interrupt structure is well-documented!

2) If a company screws up the boundary between its trade secret and
trade public, it can create all sorts of depravity, rather than
useful economic activity at the fringes of its business.

The question for today is: Do I need to get as depraved as Lancaster
to figure out how to a) hook an NTX to a Sparcstation via a SCSI
interface (which I'm told is only for hard-disks) or b) Turn on/off
Diablo 630 mode (for retrograde PC programs) via software (without
burning EEproms)?

Jordan
-=-
Jordan Pollack                          Laboratory for AI Research
CIS Dept/OSU                            

Columbus, OH 43210                      Fax/Phone: (614) 292-4890



Wed, 19 May 1993 05:48:00 GMT  
 Fear and Loathing in Reverse Polish

Quote:

> I seem to have innocently started a discussion which is getting deeper
> and deeper into Postscript cracker technology, such as ROM monitors,
> Superexec mode, the SNOOP command, and error-handling Trojan horses!
> (Its going to take me some time to figure out the lingo; The last
> trap-door I opened was APL/360 "I-beams".) After discovering that the
> guy who wrote the TV Typewriter Cookbook is into deep reverse (polish)
> engineering, I'm sure that Captain Crunch himself will soon join the fray!

> Two good points were made alone the way:

> 1) Modern Laser printers (other than NeXT's) contain good computing
> cycles which are just often sitting idle and could be harnessed for
> useful things like computing PI, or 300dpi Mandelbrot displays;
> Hopefully the interrupt structure is well-documented!

> 2) If a company screws up the boundary between its trade secret and
> trade public, it can create all sorts of depravity, rather than
> useful economic activity at the fringes of its business.

> The question for today is: Do I need to get as depraved as Lancaster
> to figure out how to a) hook an NTX to a Sparcstation via a SCSI
> interface (which I'm told is only for hard-disks) or b) Turn on/off
> Diablo 630 mode (for retrograde PC programs) via software (without
> burning EEproms)?

> Jordan
> -=-
> Jordan Pollack                             Laboratory for AI Research
> CIS Dept/OSU                              

> Columbus, OH 43210                 Fax/Phone: (614) 292-4890

sure.  You can start the HPlaserjet emulation mode and HPGL mode from
withing PS, but the diablo mode is much harder.  There is a way, however
to do it.  It involves diffrent ways on diffrent printers, but

serverdict begin statusdict begin
diablo  (or)  hplj   (or)  hpgl
will in general start them up.

diablo mode in some printers, can be started with

diabloexec  (as above).  You can tell a lot, by simply
hooking up to the laser over a serial cable, and then typeing in

executive

you then can say

/serverdict load {== ==} forall

and

/statusdict load {== ==} forall

and capturing the output.

you will find the needed info there.

I have been toying with the idea of using a SCSI port from one computer
to dump code rapidly into the NTX.  I don't have access to either, but it
would appear to me, that one could write a routine to make ANYTHING
connected to the SCSI port look like a hard disk, even if it is another
computer.  If that were done, perhaps, you could really harness this
{*filter*}.  

Cheers

Woody.



Wed, 19 May 1993 22:06:00 GMT  
 
 [ 2 post ] 

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