48G Re-creation Project (fantasy)

[ijabbott]

(10-27-2019 03:15 AM)sunhp Wrote:  

(10-27-2019 02:09 AM)Claudio L. Wrote:  My point exactly... OLED HD to emulate 128 pixels wide black and white screen? It is confusing.

131.. ok 136 pixels wide ;-)

Perhaps the 400x240 Sharp Memory LCD (model LS027B7DH01, as used on the SwissMicros DM42) could be used to simulate grayscale by dithering or half toning (since the memory LCD pixels are bi-level only). Each pixel of the HP 48 could be emulated by a 3x3 block of pixels on the 400x240 display. Four levels of grayscale could be emulated by setting 0, 3, 6 or 9 pixels of the 3x3 block.

Well maybe it had 5 levels, so maybe 0, 2, 4, 7, 9 pixels of a 3x3 block:

Code:

...  ...  .*.  ***  ***
...  .*.  .*.  .*.  ***
...  *..  *.*  ***  ***

Or something like that. (It helps if you squint.)