Cromemco Dazzler User manual

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Speciali ••• in compule,~ and pe,ipheral.
2UZ CKULESTON 110., MDU~fAltoi VIEW, C" 94043

•
•
eTECHNICAL INFORMATION
eTROUBLESHOOTING GUIDE
eSCHEMATIC
and FOIL DIAGRAMS
eASSEMBLY INSTRUCTIONS
(3
Cromemco
incQ,po'.I~<l
Special,," ,n (omputers and pelip~.,.I,
2'31 CHA~ LE S TON" D MOUNT A 'N ',,( 'N . CA. 'Q.' 1

•
_D_IA_Z_Z_L_ER ~:=- -== g.::= ==~:: -=-
lCchnical Information
•
•
Introduction
The TV DAZZLE R® color graphics module
provides ageneral purpose interface between your
computer and your color TV. The DAZZLER® can
be used to generate games, animated displays, educa·
tional learning drills or even light shows. all in full
color. The DAZZLER® is manufactured by era-
memco Inc., 280 Bernardo Ave., Mountain View,
CA
94040.
The DAZZLER® is built on two boards design-
ed to plug directly into any computer using the
5-11313 microcomputer bus. The video output of the
DAZZLE R® can be connected directly to the video
input of a color TV set. By using an optional RF
modulator, the DAZZLER® can be conveniently
connected to the antenna terminals of the TV set,
rather than the input of the video amplifier.
With
the DAZZLER® interface, TV games that
are either unavailable, or available only in black and
white, can flOW be programmed in full color. Afoot-
ball can
now sail over a bright green playing field
under the software control of your computer.
Rocket ships can spew red-yellow flames against a
brilFoantly blue sky. Or perhaps you wish to chal-
lenge
your computer to agame of checkers or chess
on a recl and black playing board-again generated
on your TV screen by the TV DAZZLER® inter-
face.
If you use your computer for business or ac-
counting purposes, the DAZZLER® interface can be
used to display multi·colored graphs of the data
stored in your computer. Your computer can be
used to process and format the raw data while his-
tograms, charts or graphs of the data are displayed
on your color TV.
The DAZZLER® interface can also turn your
color TV into a TV terminal. Alphanumeric charac-
ters entered from a teletype or ASCII keyboard can
be displayed directly on the screen of your TV using
our DAZZLEWRITER software for character gener-
ation. Messages
can also be generated internally in
your computer and displayed-in full color. Alpha-
numeric messages,
titles or comments can similar~
be displayed in conjunction with DAZZLER
games or OAZZ LE R® graphic displays.
1
A new interface board from Cromemco, our
D+7A liD, is particularly useful for inputting analog
signals for use in conjunction with the DAZZLER®.
Analog signals from joysticks, for example, can be
input to the computer with the D+7A module for
use in controlling a DAZZLER®-generated display.
Another use of the DAZZLER® interface is in
computerized instruction either at home or in the
classroom. Word recognition tests, "flash card"
arithmetic drills, and memory training can all be
carried out with the excitement of afull-color dis-
play.
Games can be interspersed with learning exer·
cises to maintain student interest and enthusiasm.
(For more information on the use of the DAZ-
ZLER® see the December '976 issue of BYTE mag-
azine,
"The Cybernetic Crayon," pp. 24·29. 138-
141, and the September 1978 issue of PERSONAL
COMPUTING, "DAZZLER® Graphics," pp. 58-72.)
Design
The DAZZLER® interface is a very advanced
design using
over 70 MaS and TTL integrated
circuits on two printed boards. Yet the DAZZLE R@
kit is easy to build. Aspecial varnish or "solder
mask" is used to guard against shorts during board
construction. And alegend mask is silk-screened
directly on the board to show precisely where each
component is placed.
Only the highest quality parts are used in the
DAZZLER® interface. The printed circuit boards
are double-sided glass-epoxy with plated-through
holes and gold plated edge contacts. Ie sockets are
used for all dual-in·line ICs. And carbon film resist·
ors
are used for high-speed operation and tempera-
ture stability.
The two DAZZLER® boards may be plugged
directly into two adjacent slots in your computer.
A 16-conductor ribbon cable. with 0 IP plugs on
each end, is used to interconnect the two boareJs.
Alternatively Board 2 may be mounted "piggyback"
on Board 1so that only one slot is required. In this
configuration, seven additional jumper wires must
be used to interconnect Board 1with Board 2.

n
'''ZZLER ------- ---- --
._n =="- _ -=~ __ =~_ = ~ _
Software
Cromemco provides software support for the
D.AZZLER® interface. Two basic software packages
are provided; DAZZ LE R® GAM ES and DAZ-
ZI_ER® GRAPHICS.
The DAZZLER® games package consists of a
Cromemco DAZZLER® Games Instruction Manual
and sixteen games (see box below) on either a 5"
diskette (model FOG-S), or an 8" diskette (model
FIJG-Ll. Either package is available from Cromem·
co, I nc. for $95.
The DAZZLER® graphics package allows the
u~:er to display graphs, graphics and alphanumerics
on acolor TV set. It consists of a DAZZlER®
Graphics Instruction Manual and the graphics pro-
gram
on either a 5" diskette (model DGR-Sl, or .~
an 8" diskette (model DGR-L). Either package is
available from Cromemco, I nco for $95.
Operation
The DAZZLE R® interface uses high-speed dir-
ect memory access (DMA) to read the memory of
the host computer and translates the information in
the memory into a color TV signal. The keyadvan-
tage of using DMA is that the DAZZLER® can dis-
play·a
picture white at the same time the computer
is executing either arelated or unrelated program.
Only a
15% slow-down of the computer execution is
realized during the DAZZLE R® operation.
•
•CHASEI** - the cross chases the circle.
•DAZZLE DOODLE* - draw a
picture using a
joystick.
•
DAZZLE-MAnON -for creating animated
displays.
•MAGENTA MARTINI -an amusing DAZ-
ZLE-MATION example.
•
DOGFIGHT** -an aerial battle game.
•
40 TIC-TAC-TOE - a 4D extension of TIC-
TAC-TOE.
• GOTCHA!** - two players vie to occupy
territory.
•KALEIDOSCOPE -for captivating color dis-
plays.
•LIFE -
an instructive game by John Conway.
• XLlFE - a particularly attractive LIFE dis-
play.
•SPACEWARu-acosmic
fight to the death.
• TRACK* -maneuver through a difficult
maze.
•DAZZLECHESS -play chess with atireless
opponent.
•AMBUSH * - take pot shots at an enemy con·
voy.
•
SOLO** -plays a tune on the JS-' console.
•TANK WARH-
tanks fight in amine field.
Requires asingle JSl joystick.
** Requires two JS·l joysticks.
2
•

DAZZLER =- =_-::. --- _-::. =-= ===
_
___________ ~=-== =====E:===-===
-- ---------
also be turned off manually by depressing the
"clear" sNitch on the computer front panel. The
remaining seven bits of output port 0EH are used to
set the starting location of the picture to be display-
ed in the
computer's memory. As will be discussed
below, the picture may require 512 bytes of mem-
ory or 21< bytes of memory depending on the mode
in which the DAZZLER® is operating. In any event,
this must be static memory with an access time of
,microsecond or faster. Asummary of the use of
outpa! port 0EH is shown below.
Bit
07 is not used. Bit 06 is used to set normal."
resolution (32 x 32 element picture tor 512 bytes or _
64 x 64 element picture tor 2K bytes) or resolution
X 4 (64 x
64 element picture for 512 bytes or 128
x128 element picture tor 2K bytes). Bit 05 sets the
amount of computer memory (starting at the loca-
tion given to output port 0EH) allocated to the pic-
ture. When
D5 is "1," 2K bytes of memory are used.
When
05 is "0," 512 bytes are used. Bit D4 is used
to select between a·black·and-white display and a
color display. Bits 03-00 are used in resolution X 4
mode
to set the color of a color picture or the inten-
sity
of ablack-and-white picture. Bits 03-00 are not
used in normal resolution mode.
~ '(ro.' ,;;t '-/."" -,... ~ .. ' _I \i
•• ~ ,~ -> - , • ~
MSB
LSB
Only two bits of input port 0EH are used. Bit
07 is low during odd lines and high during even
lines. Bit D6 goes low for 4 ms between frames to
indicate end of frame .
, _07~
~ '.T:-
c1)..!'t. _".h'l:tj:' 'O',' 1,'.: ~,\1' ,a)- -f:i,Q;l]o
~.~ -- --,-_.~ - ._"-~"
STARTING ADDRESS OF PICTURE
Output Port DEH
Output port 0FH is used to set the format of the
TV picture.
The function of each of the eight bits
of this output port is shown in this table:
07 _ Not u>ed.
06~1 _ R.""lu,ion X4. calo. ~nd intensity .. t by D4 to DO,
D6~O _ No'm~1 .... olulion_ (32)(32 for S12·byte plctuo •. 64X&4 10'
2~·by,0 p;cluro.) Color and inlonsity of each pi<1u" ol.m'nt
.. I by 4·bit wo.d. ,n Ihe OOmout.r momof)'.
05~t _ Pi"tu," In 2K bY'e> 01 memo'y.
D4~O -f11.ck-and-Whlto pictu,o. ~
D4~1 - Colo. p'CIU ••. ---,,- ~
r~ "
D3~1 _ Hiih intons.ly colo.. In ,,,,,,Iulien )( 4 black-
and-whit. mod •• D3 is II ••
D3~O - Lcw i"'.mily colo.. mD,to;Qn,licant bit
of 4-bit ;nt.n.ity etm1to(
D2~1 - BI"" ,,"o<d.
Dlet-Gleon
Bit DO iotho 10'"
DO~O _ N<, ted ,ipniliconl bil_
Output Port OFH
4
1
Only Two 8its of Inpur Port Jr~ U.ed. j•
'---------
In order to generate aTV picture with OAZ-
ZLER®, the information that the DAZZLER(;)
reads from the computer memory must be properly
formatted.
In resolution X 4 mode, each point all
the TV screen is controlled by just one bit in the
computer memory. When that bit is a "1" the cor-
responding element
of the picture is on. When that
bit is a</0" the picture element is off. In resolution
X 4 mode, the color and intensity of the picture is
set by bits 00 to 03 of the control word at output
port 0FH. For full color in resolution X 4 mode,
multiple frames of different colors must be intel--
leaved.
In norma! resolution mode, the color and inten-
sity of each element of the TV picture are contra -
led by afour-bit
"nybble" in the computer memory.
Two
elements of the picture are thus stored in eacn
byte (8 bits) of memory. (For this reason, a64 x
64
picture in normal resolution mode requires 2K of
memory.) The lowest order bit of each nybble (00) •
determines whether the corresponding element of ::
the picture contains red (1) or no red {0l. Similarly,
D1 controls green, 02 controls blue, and D3 sets

DAZZLER ---==_~::.= _-=-::.= _-=-_-:.
-
------------_--...:=-= ========:=:::==
----------
Using Two DAZZLERS
In Your Computer
If you wish to control two TV sets simulta-
neously, you can use two DAZZLERS@ in your
computer at the same time. To synchronize the
DAZZLERS®, remove the jumper wire connecting
"SYNC IN" to "G" on Board 1 ofoneoftheDAZ-
ZLERS®. Now connect "SYNC OUT" from the
other DAZZLER® to the SYNC IN pad that used to
be connected to "G". The two DAZZLERS@ are
synchronized with this connection so that they
may be operated simultaneously in the same com-
puter.
Test Program
The following program is useful tor testing the
o~eration of the DAZZLE R® and is useful for ini-
tial tune-up.
To operate this program you must have
a": least 2K bytes of memory beginning at location
zero in memory. The test program and tune-up
procedure makes use of the front panel switches
(at
input port FF) of the Cromemco 2-1 computer.
This program begins by putting the bit sequence e:
"10000000" into the accumulator and outputting it
to port 0EH, This turns on the DAZZLER® and
tells it that the picture that it is to display begins
at location zero in memory. Next the program uses
the front panel sense switches to set the control
word sent to output port 0FH, This allows the user
to experiment with different output formats and ap-
preciate
the fantastic versatility of the DAZZLER®
display, When sense switch A 12 is raised the DAZ-
ZLER® goes
into color mode, and acolorful quil1-
hke pattern will appear on the TV screen.
Tune Up
The tune-up procedure for the DAZZLER® is
straightforward. Begin by loading and running the
above test program. Raise SSW A12. Adjust R29 for
astable picture on your screen, Now raise SSWs 10,
11, 12, 13, 14. Adjust e17 for the brightest blue
color on your screen. Now lower SSW A 10 and raise
A9. Adjust R28 for the brightest green. Finally
lower
SSW A9 and raise SSW AS. Adjust R27 for
the brightest red. The tune-up of DAZZLER® is
now complete.
•
r
MNEMONICS COMMENTS .t,OOR
OBJECT
(,lr;lGO 3EB0
TEST'
LD A.8GH
; 100000008 TO REG, A
00132
D30E OUT
0EH,A
; OUTPUT TO PORT \IE
l.lG04
DBFF
IN
A.0FFH
; INPUT FROM SENSE SWITCHES
1J1J06
D3r;lF
OUT
0FH. A;
OUTPUT TO PORT 0F
Q~r;lr;lQ
JP
TEST ;
REPEAT
6

DAZZLER SCHEMATIC
-Board No.1
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8

FOIL DIAGRAM
Board No.1
9
•
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~etJ. '[)~ T~. BOARD No.2, Rev C
U,S,PAENT PENDING COPYRIGHT 1976 BY CROMEMCI)
IWARNI,~ COMPONENT MATCHING ESSENTIAL
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DAZZLER SCHEMATIC
Board No.2
11

ASSEMBLY INSTRUCTIONS
tThe Jss('mbly of tile DAZZLER ™ kit requires about onl;
evening, All components are muunted 011 the component side of
the pc boards and soldered to the toil on the opposite side. Be
sure to use high-qualllY rosin cure solder for the assembly and a
fiOlHipped low waltag" solder;n~ iron Ie sockets must be used
for all les (except for the voltage regulators le1 and IC38).
To tacilit.ltt< the assembly of your DAZZLER kit, the part
number of evu'l component is prinlec.J in position on the com-
ponent side of each pc board. The follow;,ng >yrnbols are used
on the pc boald
the cJpacitor with a pair of n~edle-nose pi,e's before
inserting it.
o Solder in I-Josltion the di,c: ("ramie capacitors CIS (180p"),
C19, 20, 21 (560 pF), e22 (,0011. C23, 24 (220 IlFj: CIS,
26 (.001), e27 (56 pFI,
o Solder in place asmall jumper wire, as shown. tetw~en ~he
pads labeled "IN" and "G" on the opposite sid" (,j trp
board.
o Solder in place the inductors L i and L7. The ind\Jctors
and L2 Me Identical.
o Solder in pOSition th~ % w~tt 5~;' cMDon tilm r.;slstors Pl·
R26,
IJ SolcJer in pJ~jtion the three 50LJ·ollrll nllrliatur~ pc,tentio 11-
eters R27, RiB, Jnd R29, Tl1es~ (tlr"e poteritiorTeters d ..
identical,
Solder in plac!.' the 1N5242 Zener diode (Dll taking \';11<;
to position the cathode end at the diode to' .... Md t:-JC' top)1
thc pc board. The cathode end of the diode I, marked ' .... ;1,
,1 hal1cl.
Solder in pO';ltilJrl transistors 02 and 03 {2N390·\) T~k"lrJ
care to pOSition the flat face ot the tranSIStors IL'Nilt,j tl~
bottom of the pc board
o
o
Solder in PO~ltlon transistor 01 12N3906) takin!] cat'e to
position the llat tace of Ihe !raf)~i\tQr toward tr,e top d
the pc boar:!.
[l Solder in poSitlO1l diode [)2 {lN9141. Take PIC 10 Ullr,\
tllC diode !.o that the cathocJe (banded) end 1\ to'''''''.1 \I',f,
top at the board.
S(Jldr'r in place the 3579.545 KC cryst,,1 IXf,i.,L.1 I,,'
cry~(;i1 ;hodd be mechanically secured In place b, "'-lr11-,'1
Jsmall piece at bare Wife tronl the pad just Ul1UP.I :w
cry;tJI. over the top at the cryst"lto the pad just i,t,(",~ : ll'
crystJI. The wire should be pulled tight and soldel"J It
c3cll r<3d,
LJ ',nsen the ICs from envelope No.1 into their sCGkrh ,)1',
Board 1. h'ke spe6al ,'cne tn 'iN Ihll <'vcry Ie is ;',uPc""
,;,i<,III"'/ il! its Sinker (1'1,1 th'l! <"lei) 1'''' (i/ ,>:'cry fl' "pro;'-
,'rfy ""1"',I;",{ ill /11 (' «H:lid
11
Assembly of DAZZLER Board 1
'09
n Sokler ,11 position Ie sockets for IC52 through 37 Solder
a 16 pin Ie socket Irl the position labeled "TO BOARD
I~O :!"
o With a Iwatsink mourl\erl between le1 (LM340T-5.0
voltage regu'l~tQrl and the pc boord, :;ecure this IC in
position 'Jsing 6·32 hardwar~ Solder the three leads in
place,
" Solder in positiofl CdPdc',tor~ Cl·CI4 {O,lJ.lF d,,,c ceramic
capacitors),
Assembly of DAZZLER Board 2
o Solder in position Ie ,;oGkets lor IC, 39 through 7,1-, Solder
a 16 rin Ie sock~t in the position IJh,'Ic'l "TO BOARD
NO.1", Do not sold~r IC ,;ock~t in the PO,;ltlon label,·d
"NO IC",
Solder ill position 1,1\('r cap,lcitor" C15 and C16 taking care
to orient the POSltlH (! I kdU [)f edCI1 Cd!lJCllOr towards the
bOltom of the pc l'Qar(1
Solder in position the: 'Jilrlal)le (~I'JC,IGr, C17 Note that the
lead on the capaciF-,r m:,rk!;d with an arrow (Joes ',11 the hok
location hrthe~t from the XTAL. lithe capacitor do~\ 110t
t,\ easily IntC) its mountlnCj holes, gently crln1fj tile I('J,h 0"
n With a h~lhirlk mOlJfll"d L.eTwe~r, IC33 I,LI,1:l401·50
voltage regJlatorl Mill tl)e 1'(: IJuarcJ, '.ecUie '<Ilis Ie '11
position using 632 hilldware. Solder the thr~e iead, II
place
U S(ll<jr" in ~cl\lllorl capacitors C23·C39 {G.1 ilr j,sc III
aIllL(',j
12

oSolder in position the filter c~pacitors C40 and C41 taking
care to orient the positive (+l lead of each capacitor toward
the bottom of the pc board.
oSolder in pOSition R30, a 1K ~.-watt 5% carbon film reo
SIHor,
oSolder ,n po~ition the seven port selection jumper wires.
The Jumper wires should connect pad J1 to Jl; J2 to J2;
J3 to J3, etc
oInsert the ICs from envelope No.2 into their sockets on
Board 2. Take ,Ipcn'll f,1r,' 10 see that evcry Ie i, properly
oriented in its 50cket and th.l/ each pin of evcry Ie is l'rop-
erly frJjiajicd in r}Jt'\ljdq'/
Interboard connection
~l A 16·conductor cable, with plugs on l'~Ch end, is provided
10 connect Board 1to Board 2. The cable should be
plugged into the socket labeled "TO BOAR D NO.2" on
the front of Board 1, be routed over the top of Board 1
down
the front of Board 2 and into the ~ocket on Board 2
labeled
"TO BOARD NO, 1".
TV, connection
C A length of RG174/U cable is provided to connect the
Dazzler to your TV. The center conductor 01 the cable
should be soldered to the terminal labeled "OUT" on
Board 1 (i,ee Note below). The sh,;eld of the caule should be
soldered to the adjacent foil ground. The other 'Jnd of thiS
cable can be coupled to the input of the Video amplifier of
a
TV, If you prefer to connect to the antenna terminals of
the set rather than to the video amplifier input, aRF mod,
ulator is required. The most cost-effective modulator that
we know of is the Pixieverter available for $8.50 from
ATV Resparch, 13th and Broadway, Dakota City Nebr;lsb
68731.
NOTE: The TV "OUT" pad IS 10caleoJ ,,1 the Lipper rlyht
corner of Board 1. Do not confuse this with the SYNC
output near the center of the boarJ,
oBefore using your DAZZLER, carefully In~pect \lour work,
The notch on every Ie should be on the left (with pin 1of
each IC toward the lower left), Be sure that all cumponents
are in the proper positions and properly oriented Also
check to be sure that you have installed the \I1~all jumper
wire shown near the top of Board 1. For Inltruction> C)n
tuning up your Dazzler r'lfer to page 4 of this IndrlliJI
Service
If for any reason you need service on your DAZZLEI'l you mdY
return the DAZZLER to Cromemco along with acheck for $35,
The
$35 covers the cost of repair, tune-up, and retul'll postage,
We reserve the right 10 not repair any DAZZLER thC! we iud9c
to be unserviceable, •
Resistor Color Codes
10 BROWN -BLACK - BLACK -GOLD
39 ORANGE -WHITE - BLACK - GOLD
150 BROWN - GREEN -BROWN - GOLD
220 RED -RED -BROWN -GOLD
270 RED - VIOLET -BROWN -GOLD
330 ORANGE -ORANGE -BROWN - GOLD
470 YELLOW -VIOLET - BROWN'- GOLD
820 GREY - RED -BROWN -GOLD
lK BROWN -BLACK - RED -GOLD
1.5K BROWN -GREEN -
RED -GOLD
7.5K
VIOLET - GREEN - RED -GOLD
9.1K WHITE -BROWN -
RED -GOLD
10K BROWN -BLACK -
ORANGE -- GOLD
15K BROWN -
GREEN - ORANGE -~ GOLD
18K BROWN - GREY - ORANGE - GOLD
30K ORANGE -BROWN - ORANGE - GOLD
36K ORANGE -BLUE - ORANGE _. GOLD
62K BLUE - RED ~ ORANGE -GOLD •
13

__ AS_S_E_M_B_L...:.¥_I __ N_ST __ R __ U.:..C_T:...:.IO.:..N:...:.S ~: ~ -= ~ ; ~ --c = ~ ~_-;, -=.
•
DAZZLER Kit-Packing List
•
Envelope No.1
Ie, Board 1
13417
1LM340T·5.0
47400
27404
1 74LS04
37408
47410
27420
1 7430
27432
37473
27474
174LS75
27493
,74151
374157
274161
274175
Envelope No.3
Capacitors
1 56 pF
1 180 pF
1Variable
2 220 pF
3560 pF
3.001 pF
260.1}JF
4 10J1F
Envelope No.5
Misc.
2Heatsinks
2
No.6 screws
2 No.6 nuts
1 2N3906
22N3904
l1N914
1 1 N5242
1 Crystal
Other
Envelope No.2
Ie, Board 2
1
lM340T·5.0
17402
27404
574LSQ4
37405
27408
1 74lS0B
174lStO
1 74lS30
.1 74LS32
37474
37475
27483
37493
17495
174157
274175
474367
Envelope No.4
Resistors
11Dahms
1 39
1150
1220
,270
3330
1 470
3500 (pot)
1820
31K
11.5K
17.5K
, 9.1 K
410K
315K
118K
1 30K
136K
162K
EnveJoplI No.6
Inductors
222 pH (Lt, L2)
•1
16 conductor interconnect cable
1
6' length of RG 174/U co~x cable
1DAZZLER
Insu'Jction Manual
2516 pin IC Sockets 124 reqdl
50 14 pin IC Sockets (50 reqd)
14