.scope memset_test
        .include "mem.inc"
        VIC_bank = $4000
        len = $1f40
        Mov_16 A_start, A_start + 1, #<VIC_bank, #>VIC_bank
        Mov_16 length,  length  + 1, #<len, #>len
        LDA #%01010101
        JSR memset
.endscope