Cromemco STDC Instruction Manual

Crom em co

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Instruction M anual*

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* Decem ber 1984 4)2 3- 241 3 I

R ev . B

C R O M E M C O , Inc. C opyright (() 19:4

P .o . B ox 741)0 C R O M E M C O , Inc.
z8() B ernardo A venue A Il R ights R eserved

# M ountaiw v iew . C x 94:39

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T his m anual w as produ ced using a C rom em eo Sy stem T hree c om puter

running under the C rom em eo C rolnix O perating Sy stem . T he text w a s

edited w ith the C rom em co C rom ix Screen E ditor. T he edited text

w as proofread by the C rom em eo S pellM aster Program and form atted @

b y t h e C r o m e m e o W o r d P r o e e s s i n g S y s t e m F o r m at t e r l l .

C am era-ready eo w w as printed on a C rom em eo 33558 printer.

T he follow ing are registered trad em ark s of C rom em eo y Ine .

C -N et *

C m eofrom e

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'#Sy stem T hre

W riteM aster---

T he follow ing &re tradem arks of C rom em eo, Ine .

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M axim iz er Tv

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TA B L E o f C O N T E N T S

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C h a p ter 1 : T H E ST X H A R D D IS K C O N T R O L L E R 1

Introdu etion l

Installing the ST X B oard 2

Sw iteh Setting s 2

J um p er Selee table O p tions 2

C ables 4

* Sof tw are Set-u p 6

L IS T O F IL L U ST R A T IO N S

* 1-1z ST X (Solder Side) 3figure

Figure 1-2: STIX (Com ponent Side) 5

Figure 1-3: Installing the Priority C able 5

Figure C- lt IfD1-1I iklodifieations (Solder Side) 14

Figure C-2 : W DI-II zkiodificatiolls (C omponent Side ) 15@

L IST O P T A B L E S

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T able 1-1: ST IX T eehnical S pee ifieations 2

L IST O F A P P E N D IC E S

A ppendix A : D isk Form at 7*

A p pendix B : Error M essages 9

A ppendix C : U sing the ST X w ith a W D I-II 13

@ A ppendix D : ST K Parts L ist 17

K H E M A T IC 21

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L IM IT E D W A P R A N T Y

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* C rom em co ST Y D isk C ontroller Instruetion M anual

1. T he ST Y H ard D isk C ontroller

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C ha pter 1@

T H E ST X H A R D D IS K C O N T R O L L E R

IN T R O D U C T IO N@

T he C rom em eo ST X board is an intellig ent hard-disk eontroller, u sing the

ST-506 standard interface to support a w ide variety of 5-1/411 W inehester drives.

A n S'rm -eontrolled drive can have u p to 16 head s and 1024 ey linders.

A s an intelligent disk controller, the ST IX needs little attention from the host#

ting sb' stem . W ith its ow n Z 8OA m icroproeessor, 641( by tes of R A LI, andopera

direct aeeess to m ain m em oc (D M A ), the ST X allow s the host C PU to eontinue

exeeuting instruetions during disk read/F rite operations, relieving the disk I/O

Hbo ttlen eek 'î afflle ting m any m ul tb -user s'y stem s.

Sy stem perform anee is further enhaneed by the S'rlr ts fou r fu ll-track data*

buffers. O n each disk read , an entire traek is read into one of the data buffers.

W hen subsequent seetor requests are on the sam e traek (as is likely), the data

is im m ediately available. If a11 the buffers are full w hen a new read request

appears, th e ST X either diseards or w rites back to disk the least-used of th e

four buffers (based on frequency of aceess and tim e sinz e last use).

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units. T hu s, a sep arate l'drive l' ean be assig n ed to eaeh u ser, or the a pp arent

n addition, the ST X ean divide a sing le disk drive into as m any as 32 logieal

disk siz e can be m atc hed to a b aek -up m ed ium .

The ST X board is supported by the follow ing operating sy stem s: C rom ix-p lus,

@ 68000 C rom ix version 20.63 or hig her, and Z8 0 C rom ix version 11.27 or hig her.

T o run the ST IX &nd W D I-II board s coneurrently in the sam e sy stem , the W D I-II

must be m e ified (refer to appendix C ).

T able 1- 1 lists the S'rm 's teehnieal spee ifie ations.

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C rom em eo ST X D isk C ontroller lnstru etion M anu al

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1. The ST X H ard D isk C ontroller

T able 1- 11 ST X T E C H N IC A L SPE C IW C A T IO N S *

fh sk Jnterfaee : ST- StM

D m ves su p ported : 2

Disk Transfer Rate: 5 megablts/seeond *

Storag e per T rack: 10K by tes

suffers: 4 data and 1 verlfy ( 10K bytes

eaeh)

5-100 lnterruptsk Veetored tnteprup t w / pri orlty

eontroller #

S-lg2 1/O Ports: 1 (lnput and output)

Proeessor T y pel Z 8 OA

lnstm etion Set: 158 lnstruc tlons , ineiudi ng the

7 $ instruetions of th e 8 08 0 *

processor

M emory: 6411 W tes RA M , 8K W tes ROM

C lœ k Frequeney t 4.0:0 M H z

Bus S-l00/1EEE-696

Pow er Requlrem ents: +8 V EE (1 1.5 am ps

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+18 V X t4 .050 am ps

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1d k'IU # .0$ 0 am p.s

O peratlY E nvironm ent: 0 - 55 degrees C

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IN STA L L IN G T H E A X B O A R D

8 w ite h Setting s @

N one .

Jxlm p er- % lee tab le O p tion s

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C P U O lee tion - W hen ship ped separately , th e Sq'm is configured for u se w ith
a D P U or X PU c en tral prœ essor board . T o use the ST Y w itb a & U , chazg e

the jum pers on the solder side of the ST Y as show n in figure 1-1.

P ort A ad ress - 'R e ST X port address is fae toc set at # 8h . lt nee essary ,

the add ress ean b e ehang ed to F A h by ehang ing m e A 1 address b it as show n in *

figure 1-1 .

2

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rom em co S -sk ontroller Instru etion u al

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C rom em eo S'rx H sk C ontroller Instruetion M anu al

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1. T he ST X H ard D isk C onk oller

C ab les *

A fter insertiœ l e S rm in any S- 100 bus slot, as d eserib e in you r e stem

m a nu al, install the e ables listed below . Th e d ata and control eables are

supplie w ith m e hard disk driv e.

C onteol Cable - Attach the control cable (Crom em co part num ber 519-010 5) @

to G e 34-pin eonneetor at J1 (figure 1-2 ), w ith the red eable stripe (pin 1) to

the left. On the drive, the eable strige must be elosest to the edge eonnK torls

key slol. lf y ou h ave tw o hard dlsks, install a d zal-driv e e on trol e able

(Crom em eo part num ber 519-0225).

Datq Cable - Attach tlle data eable (Crom emeo part num ber 519-0194) to the *

20-pln eonne tor at J5, w ith m e eable sk ip e to l e left. O n the drive , l e eable

strip e m u st b e closest to th e edg e eonnK torss key slot. If y ou hav e 1w o h ard

disks, install another data ce le from J 4 on m e S I'X to the se ond drive .

Peiority Inte rupt Cable - lhe 6-eonnœ tor priority interrupt eable (?art

A ber 519-0029) deternines l e o/ er in w hieh the host prœ essor servlees *n

e onf lie ting interru p t requesls. M tach the first eonnœ tor to J1 on the

64FX /16FX board W aligr;rg l e blue dot on l e eonnœ tor w ith l e blue dot

on the plug (see fk ure 1-3). A1<' nirg l e yellow dots on the remainiœ plugs

and eonneetors, d tach l e se ond eonnK tor to the nex t highest priority boad ,

th e th ird e onneetor to th e nex t hig hest, and so on . T he W 'IE shou ld b e th e last

boaM in the ehain, witb the priority cable eonnected tq the rigpt-hand (revision *

D and higher) IN pin of J2 ( see fk ure 1-2). The OUT pzn of J2 ls not eonneeted,

nor is the IN pin of J1 on the 641?X /16F1r .

The order of tlle boards belw ee the 6* 1r /16FX and the ST Y is not eritiealy

as loœ as no boards or eonne tors are skipp e . n e sugg este oM er of board

U -A R T , IO P , BIA R T , G PIB, C T I, PR I, #

priorities ist 64F8 7/1617X , O CTA R T , T

and ST x . A ny unused conneetors m u st be at the end of o e eable f arl est from

the 6zlFX /16FX . Never eonnœ t the prfority interrupt eable to the M axim izer,

bœ ause it could erase a11 data from o e hard diskts).

If the priority conneetors e e not eolor cœ ed , install m e ce le so th% the O U T *

pin of the higher prioriY boe is linke to the IN pin of the next highest boalt

(1 e IN pin is on the rlght on a11 boe ds exeept 64FX /15FX , ST IE revision

C , and CT I).

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* C rom em eo ST X D isk C ontroller Snstn letion M anu ai

1. T h e ST X H ard D isk C ontroller

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F igu re 1- 3 t IN STA L L IN G T H E P R IO R IT Y C A B L E

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