Top secrets sources NedoPC zxusbnet

        MODULE  fast_set_pix
        PUBLIC  fast_set_pix,fast_set_pix_table
        RSEG    CODE
fast_set_pix    ;http://zxdn.narod.ru/coding/zg1etud2.txt
        push bc
        push de
        ld l,c
    LD H,HIGH(fast_set_pix_table)
    LD D,HIGH(fast_set_pix_table)+2
    LD A,(DE)
    INC D 
    OR (HL)
    INC H
    LD H,(HL)
    LD L,A
    LD A,(DE)
    OR (HL)
    LD (HL),A
        pop de
        pop bc
        ret
        RSEG    ALIGN8
fast_set_pix_table
        DEFS 1024 
        ENDMOD
        
        MODULE  fast_set_pix_init
        PUBLIC  fast_set_pix_init
        EXTERN  fast_set_pix_table
        RSEG    CODE
fast_set_pix_init
        push bc
        push de
    LD HL,fast_set_pix_table+256
    LD DE,0x4000
GEN0 
        LD (HL),D  
    DEC H      
    LD (HL),E  
    INC H  
    INC D
    LD A,D
    AND 7
    JR NZ,LABEL
    LD A,E
    SUB 0xE0
    LD E,A
    SBC A,A
    AND -8
    ADD A,D
    LD D,A
LABEL
    LD A,D     
    SUB 88     
    JR NZ,$+3  
    LD D,A     
    INC L      
    JR NZ,GEN0 
    INC H
    LD A,128
GEN1
        LD (HL),E  
    INC H      
    LD (HL),A  
    DEC H      
    RRCA       
    JR NC,$+3  
    INC E      
    INC L      
    JR NZ,GEN1 
        pop de
        pop bc
        ret
        ENDMOD
        
        MODULE  little_set_pix
        PUBLIC  little_set_pix
        RSEG    CODE
little_set_pix
        ld a,c
        and 0x07                
        or %01000000    
        ld h,a
        ld a,c
        rrca
        rrca
        rrca    ;fghabcde
        ld l,a
        and %00011000   
        or h                    
        ld h,a
        ld a,l
        ld l,e  
        rrca
        rr l
        rra
        rr l
        rra             
        rr l
        rra     
        rrca    
        rrca            
        and %00111000   
        xor %11111110
        ld (l2+1),a
l2      set 0,(hl)
        ret
        END