🚀 go-pugleaf

In <23707@galaxy.ucr.edu> blaisdel@ucrengr.ucr.edu (james blaisdell) writes:

>  >        mov     ax, 320                 <<<-- change this to mov bx, y
>  >        mul     y       ; AX = y * 320  <<<-- and this to add bx, bx
>	then set ds, si for the table lookup by:  lds si, table

>        then load ax with screen addr by          mov ax, ds:[si+bx]

The way I usually do these things is:

    mov    ah, y
    sub    al, al
    mov    bx, ax
    shr    bx, 1
    shr    bx, 1
    add    ax, bx

I remember comparing that with the table method, and this was faster,
although I may be wrong. It probably also depends on what machine you're
using.

- James