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novamore about nova

nova

 

  4  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Nova  \No"va\  (n[=o]"v[.a]),  n.;  pl  L.  {Nov[ae]}  (-v[=e]),  E. 
  {Novas}  (-v[.a]z).  [L.,  fem.  sing.  of  novus  new.]  (Astron.) 
  A  new  star,  usually  appearing  suddenly,  shining  for  a  brief 
  period,  and  then  sinking  into  obscurity.  Such  appearances  are 
  supposed  to  result  from  cosmic  collisions,  as  of  a  dark  star 
  with  interstellar  nebulosities 
 
  Note:  The  most  important  modern  nov[ae]  are: 
 
  {No"va  Co*ro"n[ae]  Bo`re*a"lis}[1866]; 
 
  {No"va  Cyg"ni}[1876]; 
 
  {No"va  An*dro"me*d[ae]}[1885]; 
 
  {No"va  Au*ri"g[ae]}[1891-92]; 
 
  {No"va  Per"se*i}[1901].  There  are  two  nov[ae]  called  {Nova 
  Persei}.  They  are: 
  a  A  small  nova  which  appeared  in  1881. 
  b  An  extraordinary  nova  which  appeared  in  Perseus  in  1901. 
  It  was  first  sighted  on  February  22,  and  for  one  night 
  (February  23)  was  the  brightest  star  in  the  sky.  By  July 
  it  had  almost  disappeared,  after  which  faint  surrounding 
  nebulous  masses  were  discovered,  apparently  moving 
  radially  outward  from  the  star  at  incredible  velocity. 
 
  From  WordNet  r  1.6  [wn]: 
 
  nova 
  n  :  a  star  that  ejects  some  of  its  material  in  the  form  of  a 
  cloud  and  become  more  luminous  in  the  process 
 
  From  U.S.  Gazetteer  (1990)  [gazetteer]: 
 
  Nova,  OH 
  Zip  code(s):  44859 
 
  From  The  Free  On-line  Dictionary  of  Computing  (13  Mar  01)  [foldoc]: 
 
  Nova 
 
    A  {minicomputer}(?),  introduced  some  time  before 
  1978,  with  four  16-bit  {accumulator}s,  AC0  to  AC3  and  a  15  bit 
  {program  counter}.  A  later  model  also  had  a  15-bit  {stack 
  pointer}  and  {frame  pointer}.  AC2  and  AC3  could  be  used  for 
  indexed  addresses  and  AC3  was  used  to  store  the  return  address 
  on  a  {subroutine}  call  Apart  from  the  small  {register  set}, 
  the  NOVA  was  an  ordinary  {CPU}  design. 
 
  Memory  could  be  access  indirectly  through  addresses  stored  in 
  other  memory  locations.  If  locations  0  to  3  were  used  for 
  this  purpose,  they  were  auto-incremented  after  being  used  If 
  locations  4  to  7  were  used  they  were  auto-decremented. 
  Memory  could  be  addressed  in  16-bit  words  up  to  a  maximum  of 
  32K  words  (64K  bytes).  The  instruction  cycle  time  was  500 
  {nanoseconds}(?)  cycle  time  for  each  The  Nova  originally 
  used  {core  memory}  though  later  on  they  gained  {dynamic  RAM}. 
 
  Like  the  {PDP-8},  the  {Data  General}  Nova  was  also  copied,  not 
  just  in  one  but  two  implementations  -  the  {Data  General 
  MN601}  and  {Fairchild  9440}.  Luckily,  the  NOVA  was  a  more 
  mature  design  than  the  PDP-8. 
 
  Another  CPU,  the  {PACE},  was  based  on  the  NOVA  design,  but 
  featured  16-bit  addresses  (instead  of  the  Nova's  15),  more 
  {addressing  mode}s  and  a  10-level  {stack}  (like  the  {Intel 
  8008}). 
 
  [Date,  speed,  mini?] 
 
  (1996-03-01)




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