Several popular graphing calculators from Texas Instruments, including the TI-83 and TI-84, have a display resolution of 96*64, but only 95*63 pixels are used for graphing.
However, the earlier TI-81 did use all 96*64 pixels. The rationale for this change was to establish a central row and column for the axes and a central pixel for the origin. The cursor could only move pixel-by-pixel, and since the axes and origin would end up “between” pixels on the TI-81, they were inaccessible by the cursor.
The Ti-83 Plus Silver Edition and early models of the Ti-84 Plus Silver Edition had 128K of RAM, upgraded from the typical 28 or 48 that the 83 Plus or 84 Plus had. But the additional RAM was impossible to use as the OS had not been altered to address it.
Several popular graphing calculators from Texas Instruments, including the TI-83 and TI-84, have a display resolution of 96*64, but only 95*63 pixels are used for graphing.
However, the earlier TI-81 did use all 96*64 pixels. The rationale for this change was to establish a central row and column for the axes and a central pixel for the origin. The cursor could only move pixel-by-pixel, and since the axes and origin would end up “between” pixels on the TI-81, they were inaccessible by the cursor.
The Ti-83 Plus Silver Edition and early models of the Ti-84 Plus Silver Edition had 128K of RAM, upgraded from the typical 28 or 48 that the 83 Plus or 84 Plus had. But the additional RAM was impossible to use as the OS had not been altered to address it.
What an absolutely egregious waste of resources.
They did later reduce the Ti-84 Silver to 48K. Still…idiots.