cc65/libsrc/cx16/vpeek.s

;
; 2019-12-22, Greg King
;
; unsigned char fastcall vpeek (unsigned long addr);
; /* Get a byte from a location in VERA's internal address space. */
;

        .export         _vpeek

        .import         vaddr0
        .include        "cx16.inc"


_vpeek: jsr     vaddr0          ; put VERA's address
        ldx     #>$0000
        lda     VERA::DATA0     ; read VERA port zero
        rts
Added VERA peek() and poke() to the cx16 library. They simplify C programs' direct access to VERA's internal address space. 2019-10-24 05:15:42 -04:00			`;`
Updated the cx16 library to the Commander X16 Kernal's prerelease 35. 2019-12-25 10:56:32 -05:00			`; 2019-12-22, Greg King`
Added VERA peek() and poke() to the cx16 library. They simplify C programs' direct access to VERA's internal address space. 2019-10-24 05:15:42 -04:00			`;`
			`; unsigned char fastcall vpeek (unsigned long addr);`
			`; /* Get a byte from a location in VERA's internal address space. */`
			`;`

			`.export _vpeek`

Updated the cx16 library to the Commander X16 Kernal's prerelease 35. 2019-12-25 10:56:32 -05:00			`.import vaddr0`
Added VERA peek() and poke() to the cx16 library. They simplify C programs' direct access to VERA's internal address space. 2019-10-24 05:15:42 -04:00			`.include "cx16.inc"`


Updated the cx16 library to the Commander X16 Kernal's prerelease 35. 2019-12-25 10:56:32 -05:00			`_vpeek: jsr vaddr0 ; put VERA's address`
Added VERA peek() and poke() to the cx16 library. They simplify C programs' direct access to VERA's internal address space. 2019-10-24 05:15:42 -04:00			`ldx #>$0000`
			`lda VERA::DATA0 ; read VERA port zero`
			`rts`