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HP 9872C and 9872T Graphics Plotters Reference Card

HP 9872C and 9872T Graphics Plotters Quick reference for HP 9872C and HP 9872T graphics plotters. This page is an HTML transcription of the 4-page reference card (Part No. 09872-90013, February 1982) with command names, defaults, error messages, addressing data, and instruction definitions.

Plotter Default Conditions

Relative character direction Horizontal (DR 1,0)
Line type Solid line
Line pattern length 4% of the distance from P1 to P2
Input window Mechanical limits of plotter
Relative character size 0.75% of |P2x - P1x| by 1.5% of |P2y - P1y|
Automatic pen pickup On
Pen velocity 36 cm/s
Adaptive pen velocity Off
Symbol mode Off
Tick length 0.5% of |P2x - P1x| or |P2y - P1y| for tp or tn
Standard character set Set 0
Alternate character set Set 0
Character slant 0 degrees
Mask value 223,0,0
Digitize clear On
Scaling Off

P1 and P2 are changed only with the initialize command (IN). They are not affected by device clear and the default command (DF).

On the 9872T the cutter is enabled only with the initialize command (IN). It is not affected by device clear and the default command (DF).

The current pen location is moved to the lower right corner with the initialize command (IN) but is unaffected by device clear and the default command (DF).

Error Messages

error 1 Instruction not recognized
The plotter has received an illegal character sequence.
error 2 Wrong number of parameters
Too many or too few parameters have been sent with an instruction.
error 3 Bad parameter
The parameters sent to the plotter with an instruction are out of range for that instruction.
error 4 Illegal character
The character specified as a parameter is not in the allowable set for that instruction.
error 5 Unknown character set
A character set out of the range 0 through 4 has been designated as either the standard or alternate character set.
error 6 Position overflow
An attempt to draw a character or perform a CP that is located outside of the plotter numeric limit of +32767.
error 8 Out of paper
Either the advance option is off when an AH or AF is attempted or the out-of-paper sensor indicates no paper after an advance.

HP 9872 HP-IB Implementation

  1. Functions implemented (ANSI/IEEE 488-1978)
    1. Source Handshake (SH1)
    2. Acceptor Handshake (AH1)
    3. Talker (T2) Serial Poll
    4. Listener (L2)
    5. Service Request (SR1)
    6. No Remote Local (RL0)
    7. Parallel Poll (PP2)
    8. Device Clear (DC1)
    9. No Device Trigger (DT0)
  2. Device Clear or Selected Device Clear causes the plotter to:
    1. Complete plotting of points in progress, then stop.
    2. Reset parser to expect next instruction.
  3. PPPRN for parallel poll is assigned by the rear panel address switch. Listen addresses O through 7 assign DIO lines 8 - 1 respectively. All other listen addresses disable parallel poll.
Address Switch Positions
Address Characters Address Switch Settings Address Codes
Listen Talk A5 A4 A3 A2 A1 Dec Oct
SP @ 0 0 0 0 0 0 0
! A 0 0 0 0 1 1 1
" B 0 0 0 1 0 2 2
# C 0 0 0 1 1 3 3
$ D 0 0 1 0 0 4 4
% E 0 0 1 0 1 5 5
& F 0 0 1 1 0 6 6
‘ G 0 0 1 1 1 7 7
( H 0 1 0 0 0 8 10
) I 0 1 0 0 1 9 11
* J 0 1 0 1 0 10 12
+ K 0 1 0 1 1 11 13
, L 0 1 1 0 0 12 14
- M 0 1 1 0 1 13 15
. N 0 1 1 1 0 14 16
/ O 0 1 1 1 1 15 17
0 P 1 0 0 0 0 16 20
1 Q 1 0 0 0 1 17 21
2 R 1 0 0 1 0 18 22
3 S 1 0 0 1 1 19 23
4 T 1 0 1 0 0 20 24
5 U 1 0 1 0 1 21 25
6 V 1 0 1 1 0 22 26
7 W 1 0 1 1 1 23 27
8 X 1 1 0 0 0 24 30
9 Y 1 1 0 0 1 25 31
: Z 1 1 0 1 0 26 32
; [ 1 1 0 1 1 27 33
< \ 1 1 1 0 0 28 34
= ] 1 1 1 0 1 29 35
> ^ 1 1 1 1 0 30 36
? _ 1 1 1 1 1 31 37

Address restricted to these codes when using parallel poll capability.

Preset

Reserved HP computer address. Not available for plotter use.

Reserved universal unlisten command.

Instruction Definitions

Instruction Definition
AF or PG or PG1 Advance full page
AH Advance half page
AP (n) Automatic pen pickup, n = integer or no parameter
CAn Designate alternate set n (integer 0 through 4)
CP spaces, lines Character plot [d]
CS m Designate standard set m (integer 0 through 4)
DC Digitize clear
DF Set default values
DI run, rise Absolute direction [d]
DP Digitize point
DR run, rise Relative direction [d]
EC (n) Enable cutter, n = integer or no parameter
IM e (,s(,p)) Input e, s, and p masks, parameters integers 0 through 255
IN Initialize
IP P1x,P1y,P2x,P2y Input P1 and P2 [i]
IW Xlo,Ylo,Xhi,Yhi Input window where 0 < X < 16000, 0 < Y < 11400, lo < hi
LB c...c Label some ASCII string (end with ETX character)
LT t (l) Designate line type t (integer 0 through 6) and length [d]
OA Output actual position and pen status [i]
OC Output commanded position and pen status [i]
OD Output digitized point and pen status [i]
OE Output error [i]
OF Output factors [i]
OI Output identification [c]
OO Output options [i]
OP Output P1 and P2 [i]
OS Output status [i]
PA x,y (,x,y...) Plot absolute [i]
PD Pen down
PG or PG1 Advance full page
PR x,y (,x,y...) Plot relative [i]
PU Pen up
SA Select alternate character set
SC Xmin, Xmax, Ymin, Ymax Scale [i]
SI width, height Absolute character size [d]
SL tan Θ Absolute character slant (from vertical) [d]
SM c Symbol mode [c]
SP n Select pen n (integer 0 through 8)
SR width, height Relative character size [d]
SS Select standard character set
TL tp (,tn) Tick length [d]
UC (pen,) x,y (,pen) (,x,y) (...) User defined character [i]
VA Adaptive velocity
VN Normal velocity
VS v (,n) Select velocity v (integer 1 through 36) for pen n (integer 1 through 8)
XT X-axis tick
YT Y-axis tick

Formats

[i] Integer format between +32767 (scaling off) and +16383 (scaling on). No decimal.
[d] Decimal format between +127.999. Decimal is optional.
[c] ASCII character.