Appendix 6: Power Supply Requirements


The following is a summary of the power supply requirements for the 
Amstrad PC 1512:-

Main Electronics Board   Expansion Slots Allowance    Floppy Disc Drive
(Including Keyboard)     (Three Slots)                (Single)
    +5V 2.80 Amp             +5V 2.70 Amp                 +5V 0.60 Amp
    +12V 0.15 Amp            +12V 0.15 Amp                +12V 1.30 Amp
    -12V 0.10 Amp            -12V 0.15 Amp                -12V 0.00 Amp
    -5V 0.00 Amp             -5V 0.10 Amp                 -5V 0.00 Amp

Hard Disc Drive                       This results in the following total 
    +5V 1.30 Amp                      for the worst case configuration:   
    +12V 2.00 Amp                     System with 2 floppy drives and
   (2.50 Amp during Motor Start-Up)   Hard Disc:-
    -12V 0.00 Amp                         +5V 8.00 Amp
    -5V 0.00 Amp                          +12V 4.90 Amp
                                          -12V 0.24 Amp
                                          -5V 0.10 Amp



Appendix 7: 512K to 640K conversion


Use 18 pcs 64K - 150 nS DRAMS plugged into 18 I.C. sockets provided, 
numbered IC153 to IC170 on main pcb. A link switch must then be moved 
into the 640K position. (see link diagram). It is important that this 
switch position is changed before unit is switched on. Please note that 
if a 2nd drive has been fitted, it needs to be removed while adding the 
extra memory.
                     IC153  IC162          R169
        Main                                   R163
        PCB                 
                                             UUUUUU
                                ______ shown in
                                                    /       512K 
                             ͵ o  /        position
                                       
           2nd                             
          DISC                                          DISC   
           DRIVE                           DRIVE  
          if                                            
           fitted                          
                                                               
                                                  
                                                               
                                                  
                                                               
                                                  
      
        FRONT                                         


Appendix 8: ROM Character Set

Ŀ
      DEC  32 48 64 80 96112128144160176192208224240 16 0 
    Ĵ
     HEX  2  3  4  5  6  7  8  9  A  B  C  D  E  F  1  0 
Ĵ
 0    0      0  @  P  `  p                   bnk
Ĵ
 1    1   !  1  A  Q  a  q                     
Ĵ
 2    2   "  2  B  R  b  r                     
Ĵ
 3    3   #  3  C  S  c  s                     
Ĵ
 4    4   $  4  D  T  d  t                     
Ĵ
 5    5   %  5  E  U  e  u                     
Ĵ
 6    6   &  6  F  V  f  v                     
Ĵ
 7    7   '  7  G  W  g  w                     
Ĵ
 8    8   (  8  H  X  h  x                     
Ĵ
 9    9   )  9  I  Y  i  y                    	 
Ĵ
 10   A   *  :  J  Z  j  z                      
Ĵ
 11   B   +  ;  K  [  k  {                       
Ĵ
 12   C   ,  <  L  \  l  |                     
Ĵ
 13   D   -  =  M  ]  m  }                      
Ĵ
 14   E   .  >  N  ^  n  ~                     
Ĵ
 15   F   /  ?  O  _  o                 bnk    


+ Note that in the optional Danish character set, the characters  and  are
replaced by  and  respectively.


                                                                 
Appendix 9: Keyboard Keycodes


Ŀ
  Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ  
 1  2  3  4  5  6  7  8  9  10 11 12 13 112 14  
                  
      Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ   
       15 16 17 18 19 20 21 22 23 24 25 26 27 55   
                      
    Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ 
   56 29 30 31 32 33 34 35 36 37 38 39 40 41 28 
                   
      Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ Ŀ   
       42 43 44 45 46 47 48 49 50 51 52 53 54 58   
                      
              Ŀ                
                                   57                                       
                              

                                          Keyboard centre section
                          126      125
ĳ                           Ŀ
  Ŀ Ŀ              /ڿ    ڿ\                     Ŀ    Ŀ   Ŀ 
  59 60                                     69    70   74 
               /  ٳ     \                            
  Ŀ Ŀ            M1      M2                   Ŀ Ŀ Ŀ      
  61 62           /             \                   71 72 73      
                                               Ŀ 
  Ŀ Ŀ                                             Ŀ Ŀ Ŀ 78 
  63 64                           75 76 77  
                    Mouse                                 
  Ŀ Ŀ                                             Ŀ Ŀ Ŀ      
  65 66                   Ŀ           79 80 81 Ŀ
                  120ڿ    124    ڿ119          116
  Ŀ Ŀ                JF1     A     ٳJF2          Ŀ    Ŀ ٳ
  67 68                                            82    83      
                       122<--O-->121                        
ĳ                                  
Keyboard left side                    V                 Keyboard right side
                                     123      
                               
                                   Joystick


