- ; do test for VDC presence here???
-
- ldx #VDC_CSET ; determine size of RAM...
- jsr vdcgetreg
- sta tmp1
- ora #%00010000
- jsr vdcputreg ; turn on 64k
-
- jsr settestadr1 ; save original value of test byte
- jsr vdcgetbyte
- sta tmp2
-
- lda #$55 ; write $55 here
- ldy #ptr1
- jsr test64k ; read it here and there
- lda #$aa ; write $aa here
- ldy #ptr2
- jsr test64k ; read it here and there
-
- jsr settestadr1
- lda tmp2
- jsr vdcputbyte ; restore original value of test byte