hp19bii

Model:	19BII, differences from -19B

General:
	Name:			HP Business Consultant II
	Code-Name:		?
	Logic:			RPN, algebraic w/no precedence
	Firsts:			first dual logic machine (with 17BII)
				last Clamshell
	Introduction:
		Date:		1990-1
		Price:		$175
	Discontinuation:
		Date:		<2003-01-01
		Price:		?
	Production-Run:		?

Memory:
	Named-Registers:	4 line history, line 2 is LAST or X, Y, Z, T,
				last X; 0-9
	Machine-State:		prefix key state
				RPN / algebraic
				pending operations
				printer status
				display contrast
				display mode
				radix mark
				deg / rad
				language
				currency conversion factors
				beeper
				printer
				registers and history
				statistics lists
				CFLO lists
				alarms
				current application and invocation history
				time and time format
				memory

Keyboard:
	Shift-Keys:		gold, white, above

Key-Labels-Base-Keyboard::

(The = key has a lower label of ENTER.)

Key-Labels-gold-white-above::

Right

[]	[]	[]	[]	[]	[]
[]	[]	[]	MODES	PRINTER	MAIN
CLEAR DATA	E	Rv	x<>y	CLEAR
[]	[]	[]	[]	1/x
[]	[]	[]	[]	^
MATH	[]	[]	[]	\v/x
				 2
[]	MEM	SHOW	LAST	x

Non-Programmable-Operations::

(		start nesting or Rv
)		end nesting or x<>y
=		complete operation or ENTER
INPUT		use number in line 1 as response or ENTER
LAST		use number in history line 2 or Last X
Rv		roll down
x<>y		exchange x and y
^		move to previous item or roll up

Solver Functions

G(a)		get value of a
L(a:v)		assign value v to a

Menus::

MODES:	D/R	BEEP	PRNTR	INTL	DEMO	MORE
MODES:	ALG	RPN	MORE

Bugs/ROM-Versions::

There is an oddity in the RPN stack of this (and the 17bii) in that
the stack ranges in size from 1 to 4 entries, depending upon how
much data has been entered.  For example, if you do:

	- switch to RPN mode
	- 1
	- Enter
	- 2
	- Rv
	- Rv

You will see "2" in the display, not zero.


(from Wlodek Mier-Jedrzejowicz)

Early models of the HP19BII have a bug which is activated when the
HP19BII is in RPN mode and the [+/-] and [x<>y] keys are pressed one
after the other. A harmless way to see the bug is as follows:

1. Put a positive number on the stack, for example press the 9 key.
2. Change the sign by pressing the [+/-] key next to [INPUT].
3. Exchange x and y by pressing the key with x<>y above it.
4. Now type a digit, for example 8; you will see a minus in front of it.
(This is the bug; after +/- to change a positive number to negative,
immediately followed by x<>y and a number, the number has a spurious
minus sign placed in front of it.)
5. Press [INPUT] and you will see the number is really positive.
6. Type another number; it will again have a minus sign.
7. To deactivate the bug safely press CLEAR (the yellow key followed by 
the backarrow key).

The bug is dangerous, if you get to step 4 and see a number which is
negative though it should not be, you might be tempted to press the
backarrow key to remove the number and the minus sign. Since the minus
sign is not really there, if you try to delete it, you confuse the
calculator - it stops for a moment, then clears the stack after you
press the next key. If the next key you press is [ON], it sometimes
displays the screen to choose a language, and when you choose a
language, you get MEMORY LOST! The bug can also lock up your keyboard
- in that case you should reset the calculator by pressing the ON key
and the third key from the left in the top row both at the same time.
If you ever see the bug, press CLEAR at once to kill it!

There are some variations on the bug. If you press the backarrow key
until only the minus sign is in the display, then press [INPUT] or try
to use this minus sign, nothing will work except that the [-] key will
put a second minus in the display. If you do steps 1 through 4, then
press [+/-], x<>y, and a digit key again, you will see two minus
signs, and you can repeat this process adding one more minus sign each
time. If you press CLEAR now, then type a number, press [+/-],
[INPUT], x<>y, [+/-], x<>y and then a digit key, you will see a zero
(if the display mode is ALL) or a fraction mark (if the display mode
is FIX) in front of the digit instead of a minus.

The same bug exists in early HP17BII models, though it behaves a little 
differently. It was removed early in 1991.


------------------------------

From: "Christoph Giesselink" <cgiess@swol.de>
Newsgroups: comp.sys.hp48
Subject: Re: SysRPL on HP19B2 ???
Date: Mon, 10 Feb 2003 23:42:54 +0100
Message-ID: <b299vb$jka$07$1@news.t-online.com>

The HP19BII has no RPL programming features accessable by the user.
Internally many parts are written in RPL. The HP19BII hardware is very
similar to the HP28S, only the 8KB RAM chip use a different memory location.
A added the MMU layout of the HP19BII and HP28S.

0 = address line must be low
1 = address line must be high
X = don't care

The first definition is for the master, the 2nd for the Slave controller.

@ HP19BII
Y                         Model (Tycoon II)
000XXXXXXXXXXXXXXXXX 64   ROM
XXXXXXXXXXXXXXXXXXXX  0 R Memory Controller Chip 1 (disabled)
110001XXXXXXXXXXXXXX  8 W Memory Controller Chip 2 (RAM)
1111111111XXXXXXXXXX      Display/Timer
1111111111110000XXXX      Control Register
001XXXXXXXXXXXXXXXXX 64   ROM
XXXXXXXXXXXXXXXXXXXX  0 R Memory Controller Chip 1 (disabled)
XXXXXXXXXXXXXXXXXXXX  0 R Memory Controller Chip 2 (disabled)
1111111110XXXXXXXXXX      Display/Timer
1111111110110000XXXX      Control Register

@ HP28S
O                         Model (Orlando)
000XXXXXXXXXXXXXXXXX 64   ROM
10XXXXXXXXXXXXXXXXXX  0 R Memory Controller Chip 1 (unused)
110XXXXXXXXXXXXXXXXX 32 W Memory Controller Chip 2 (RAM)
1111111111XXXXXXXXXX      Display/Timer
1111111111110000XXXX      Control Register
001XXXXXXXXXXXXXXXXX 64   ROM
XXXXXXXXXXXXXXXXXXXX  0 R Memory Controller Chip 1 (disabled)
XXXXXXXXXXXXXXXXXXXX  0 R Memory Controller Chip 2 (disabled)
1111111110XXXXXXXXXX      Display/Timer
1111111110110000XXXX      Control Register

Cheers

Christoph

"Matti Overmark" <matti.overmark@www.com> schrieb im Newsbeitrag
news:b1a4e204.0302100410.26c61d27@posting.google.com...
> Hi,
>
> Please donīt swallow your morning coffee the wrong way.
> Iīm just wondering if there are any hidden features of the HP19BII?
> Itīs almost (well I am indeed pushing it now, ... ) a HP28, must have
> a Saturn processor etcetera.
> SOmeone must have found out how to "dissolve" it?
>
> Just my monday-morning thoughts after grabbing the mentioned calc
> yesterday.
>
> Best regards, Matti
> +0 deg C in the North of Sweden


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Last modified Saturday, 2012-02-25T17:29:25-06:00.