M a c h i n e 	 	 K o r v e t 	 K o r v e t 2 	 K o r v e t 2 	 A t m 	 P r o f i 	 O r i o n 	 O r i o n 2 	 Q u o r u m 	 S c o r p i o n V e c t o r 0 6 c 
 
 C o m m e n t 	 	 C P / M 	 M D O S 	 	 C P / M 	 C P / M 	 C P / M 	 C P / M   H D 	 C P / M 	 C P / M 
 
 
 
 l e n 	 	 0 3 	 0 3 	 0 3 	 0 1 	 0 3 	 0 3 	 0 3 	 0 3 	 0 1 	 0 3 
 
 d e n 	 	 0 1 	 0 1 	 0 1 	 0 1 	 0 1 	 0 1 	 0 1 	 0 1 	 0 1 	 0 1 
 
 s e c 	 	 0 0 0 5 	 0 0 0 5 	 0 0 0 5 	 0 0 1 0 	 0 0 0 5 	 0 0 0 5 	 0 0 0 A 	 0 0 0 5 	 0 0 1 0 	 0 0 0 5 
 
 t r k 	 	 0 0 5 0 	 0 0 5 0 	 0 0 5 0 	 0 0 5 0 	 0 0 5 0 	 0 0 5 0 	 0 0 5 5 	 0 0 5 0 	 0 0 5 0 	 0 0 5 0 
 
 
 
 s p t 	 	 0 0 2 8 	 0 0 2 8 	 0 0 2 8 	 0 0 2 0 	 0 0 2 8 	 0 0 2 8 	 0 0 5 0 	 0 0 2 8 	 0 0 2 0 	 0 0 2 8 
 
 b s h 	 	 0 4 	 0 4 	 0 4 	 0 4 	 0 4 	 0 4 	 0 4 	 0 4 	 0 5 	 0 4 
 
 b l m 	 	 0 F 	 0 F 	 0 F 	 0 F 	 0 F 	 0 F 	 0 F 	 0 F 	 1 F 	 0 F 
 
 e x m 	 	 0 0 	 0 0 	 0 0 	 0 0 	 0 0 	 0 0 	 0 0 	 0 0 	 0 3 	 0 0 
 
 d s m 	 	 0 1 8 A ( 9 ) 	 0 1 8 7 ( 6 ) 	 0 1 8 7 	 0 1 3 A 	 0 1 8 E 	 0 1 8 4 	 0 3 4 4 	 0 1 8 5 ( 4 ) 	 0 0 9 B 	 0 1 8 7 	 
 
 d r m 	 	 0 0 7 F 	 0 0 7 F 	 0 0 7 F 	 0 0 7 F 	 0 0 7 F 	 0 0 7 F 	 0 0 F F 	 0 0 7 F 	 0 0 3 F 	 0 0 7 F 
 
 a l 	 	 0 0 C 0 	 0 0 C 0 	 0 0 C 0 	 0 0 C 0 	 0 0 C 0 	 0 0 C 0 	 0 0 F 0 	 0 0 C 0 	 0 0 C 0 	 0 0 C 0 
 
 c k s 	 	 0 0 2 0 	 0 0 2 0 	 0 0 2 0 	 0 0 2 0 	 0 0 2 0 	 0 0 2 0 	 0 0 4 0 	 0 0 2 0 	 0 0 1 0 	 0 0 2 0 
 
 o f f 	 	 0 0 0 2 	 0 0 0 3 	 0 0 0 2 	 0 0 0 2 	 0 0 0 0 	 0 0 0 4 	 0 0 0 2 	 0 0 0 4 	 0 0 0 4 	 0 0 0 8 
 
 
 
 s k e w 	 	 0 	 0 	 0 	 0 	 0 	 0 	 0 	 0 	 2 	 0 
 
 
 
 S i z e 	 	 0 C 8 0 0 0 	 0 C 8 0 0 0 	 0 C 8 0 0 0 	 0 A 0 0 0 0 	 0 C 8 0 0 0 	 0 C 8 0 0 0 	 1 A 9 0 0 0 	 0 C 8 0 0 0 	 0 A 0 0 0 0 	 0 A 0 0 0 0 
 
 S e c S i z e 	 	 0 4 0 0 	 0 4 0 0 	 0 4 0 0 	 0 1 0 0 	 0 4 0 0 	 0 4 0 0 	 0 4 0 0 	 0 4 0 0 	 0 1 0 0 	 0 4 0 0 
 
 T r k N u m 	 	 A 0 	 A 0 	 A 0 	 A 0 	 A 0 	 A 0 	 A A 	 A 0 	 A 0 	 A 0 	 	 
 
 B l o c k S i z e 	 0 8 0 0 	 0 8 0 0 	 0 8 0 0 	 0 8 0 0 	 0 8 0 0 	 0 8 0 0 	 0 8 0 0 	 0 8 0 0 	 1 0 0 0 	 0 8 0 0 
 
 E x t e n t S i z e 	 0 0 4 0 0 0 	 0 0 4 0 0 0 	 0 0 4 0 0 0 	 0 0 4 0 0 0 	 0 0 4 0 0 0 	 0 0 4 0 0 0 	 0 0 4 0 0 0 	 0 0 4 0 0 0 	 0 1 0 0 0 0 	 0 0 4 0 0 0 
 
 C P 	 	 K o i 	 K o i 	 K o i 	 A t m 	 P r o f i 	 C p 8 6 6 	 C p 8 6 6 	 P r o f i 	 K o i 	 K o i 
 
 
 
 l e n :   b y t e ; / / S e c t o r   s i z e   0 = 1 2 8 ,   1 = 2 5 6 ,   2 = 5 1 2 ,   3 = 1 0 2 4 
 
 d e n :   b y t e ; / / H e a d   n u m b e r   - 1 
 
 s e c :   w o r d ; / / S e c t o r s   p e r   T r a c k 
 
 t r k :   w o r d ; / / T r a c k s   n u m b e r 
 
 s p t :   w o r d ; / / R e c o r d s   ( 1 2 8   b y t e s )   p e r   T r a c k 
 
 b s h :   b y t e ; / / B l o c k = 1 2 8 * 2 ^ b s h 
 
 b l m :   b y t e ; / / B l o c k = 1 2 8 * ( b l m + 1 ) 
 
 e x m :   b y t e ; / / E x t e n t   ( 0 = 1 6 k ,   1 = 3 2 k ,   3 = 6 4 k ,   7 = 1 2 8 k ) 
 
 d s m :   w o r d ; / / B l o c k s   n u m b e r   w i t h o u t   c a t a l o g u e   d s m = ( ( T r k N u m - D P B . o f f ) * D P B . s p t * $ 8 0   -   ( D P B . d r m + 1 ) * $ 2 0 ) / B l o c k S i z e   
 
 d r m :   w o r d ; / / C a t a l o g u e   c a p a c i t y   - 1 
 
 a l :   w o r d ; / / C a t a l o g u e   B l o c k   M a s k 
 
 c k s :   w o r d ; / / C a t a l o g u e   s i z e   i n   1 2 8   b y t e s   r e c o r d s 
 
 o f f :   w o r d ; / / O f f s e t   -   n u m b e r   o f   S y s t e m   T r a c k s 
 
 s k e w :   s t r i n g ; / / S k e w   f a c t o r   -   S o f t w a r e   s k e w e d   s e c t o r s   s k e w   v a l u e   o r   s e c t o r s   o r d e r   n u m b e r s 
 
 S i z e :   i n t e g e r ; / / I m a g e   f i l e   s i z e 
 
 S e c S i z e :   i n t e g e r ; / / S e c t o r   S i z e   =   l e n   ( 0 = 1 2 8 ,   1 = 2 5 6 ,   2 = 5 1 2 ,   3 = 1 0 2 4 ) 
 
 T r k N u m :   i n t e g e r ; / / T r a c k s   n u m b e r   -   ( d e n + 1 ) * t r k 
 
 B l o c k S i z e :   i n t e g e r ; / / B l o c k   S i z e 
 
 E x t e n t S i z e :   i n t e g e r ; / / E x t e n t   s i z e 
 
 C P :   s t r i n g ; / / D e f a u l t   c o d e   p a g e 