Pro-Z Code - programming: procedure for checking Scorpio and the presence of HDD.

              ############# PRO-Z C0dе ############             
                                                                
 (C) Siril^4D                                                   
                                                                
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Prоcеdиrе #1                                                    
                                                                
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;Wbr & SiRiL/4D. :)                                             
;проверка скорповости и наличия винта.                          
;на выходе: флаг C=1 - нет винта                                
                                                                
CHЕCКHD                                                         
        DI                                                      
        LDA,(#0008)                                       
CP #C3                                             
        JR NZ,NO HDD; this is not scorpion                   
                                                                
        LD BC,#1FFD                                        
        LD A,#02                                           
        OUT (C),A ;on shadow worker                   
        LD A,(#00F1) ;took the version code               
        LD E,#00                                           
        OUT (C),E ;off shadow worker                  
        CP #5e                                             
        JR C,NO HDD; ROM does not support HDD        
                                                                
        LD BC,#FFBE ;<= Status register              
        CALL RD DOS ;(it can be written to)          
        CP #FF ;(2 major vitas are significant)           
        JR Z,NO HDD ;status register is empty         
        XOR A                                               
 RET ;screw present                      
NO HDD                                                          
        SCFRET ;no screw                      
                                                                
;------------------------------;                               
; check the drive itself                                        
;the variable DRIVE must contain the number 0...3.                  
;output: flag C=1 - real disk drive                        
                                                                
DRIVE ЕQU #5CF6 ;drive number (0-3)          
TEST                                                            
        LD A,(DRIVE)                                       
        AND #3                                              
        CP#2                                              
        JR NC,OK HDD ;C and D are always on the screw        
        RRA                                                     
 JR C,TEST B                                        
TEST A                                                          
        LD ВC,#7FВА ;check A                    
        CALL RD DOS                                          
        BIT 6,A                                             
        JR NZ,OK HDD ;A on screw                     
        SCFRET ;A on a floppy disk                   
                                                                
TEST B                                                          
        LD ВC,#7FВА;check В                    
        CALL RD DOS                                          
        BIT 7,A                                             
        JR NZ,OK HDD ;B on the screw                     
        SCF                                                     
        RET ;B on a floppy disk                   
                                                                
OK HDD                                                          
        OR A ;device on screw                
        RET                                                     
RD DOS                                                          
        LD HL,#3FF3                                        
        PUSH HL                                              
        JP #3D2F                                           
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Procedure#2                                                    
                                                                
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SoнdOff di                                                   
           ld bc,#7ffd:ld a,#10                               
           oit (bc),a                                           
                                                                
 ld bc,#1ffd:ld a,#10                               
           oit (bc),a                                           
                                                                
           ld а,(#е028) ;syst. Monitor variable            
           or 1 ;turn on the beat                        
           ld (#е028),а ;put it in place                      
                                                                
           ld bc,#1ffd                                        
           ld а,#0                                            
           oit (bc),a                                           
           retConnect On di                                                   
           ld bc,#7ffd:ld a,#10                               
           oit (bc),a                                           
                                                                
           ld bc,#1ffd:ld a,#10                               
 ld bc,#7ffd:ld a,#10                               
           oit (bc),a                                           
                                                                
           ld bc,#1ffd:ld a,#10                               
           oit (bc),a                                           
                                                                
           ld а,(#е028) ;syst. Monitor variable            
           and #fe ;cut out the beat                       
           ld (#е028),а ;put it in place                      
                                                                
           ld bc,#1ffd                                        
           ld а,#0                                            
           oit (bc),a                                           
           ret                                                  
                                                                
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