Addressing multiple PORTs using one Variable

[flotulopex]

Hi All,

I need to address five ports conditionally according to the value of one variable.

I found some posts about this subject and hoped this thread would help, but unfortunately, it doesn't.

This a code extract of my current project where timing is crucial and I have to write down a lot of repeating lines of code since FOR/NEXT and GOTOs and GOSUBs take too much time (I'm driving five NeoPixel SW2812B strings with each 28 LEDs/Pixels).

' PIC 16F690 @20MHz
#CONFIG
    __config _FCMEN_OFF &_IESO_OFF &_CPD_OFF &_WDT_OFF &_HS_OSC &_BOR_OFF &_CP_OFF &_PWRTE_OFF &_MCLRE_OFF
#ENDCONFIG

TRISC = %00000000

DEFINE OSC 20

PortPin VAR PORTA.0
X       VAR BYTE
X       = 23            ' PORTC.7 - "PORTA.0[23]"

MAIN:
    PORTC.7      = 1    ' OK, obviously will work but useless - just make shure the scope works too
    'PORTA.0[23]  = 1   ' OK but useless
    'PORTA.0[X]   = 1   ' No! Makes a blink in the scope and then stays LOW
    'PORTA[X]     = 1   ' No!, nothing happens, pin stays LOW
    'PortPin[23]  = 1   ' OK but useless   
    'PortPin[X]   = 1   ' No!, nothing happens, pin stays LOW
    'PortPin.0[X] = 1   ' No!, error message "Bad variable size modifier: .0"
    '...
        ASM
            nop
            nop
            nop
        ENDASM
    PORTC.7 = 0         ' have this syntax for tests only here
        ASM
            nop
        ENDASM
        
    GOTO MAIN
END

How do I solve this please?