Programming SRAM HI*RES, Part II

At this point, let’s give credit where credit is due. As you may know, SRAM HI*RES Extended BASIC is a collection of new commands that make use of a high-res core routine developed by Mr. Wilf Rigter. This routine is an invention anywhere as significant as the original “cheap video” system employed in the ZX81. Without this core routine, all the neat possibilities that SRAM HI*RES has to offer would be completely useless. With no other hardware requirement than a static RAM in the 8-16K region, this routine is what gives your humble ZX/TS a whole new look, not to mention new worlds of possibility.