A screenshot would be nice. In all cases I've seen, the higher number of shades you go the less difference there are between them. Ie, the darkes shades tend to look too similar to one another as do the light ones. I think about 6 shades seem to be the most discernible.
Uuuuh, here it is that sometimes when i run it the gray is only on the left 64x64pxl box and the rightmost 16pxl column is just static o.OI thought I had fixed this bug, which I had thought was due to LCD delay issues. The LCD is going into 6-bit mode somehow, but I'm not sure exactly how it happens. It only happens on some of my calculators, particularly the older ones, such as one of my 83+s but not the other, and my oldest 84+.
This definitly sound interesting. I wonder however how the r register is used. It look like you manually set it up with your value (46h). However, won't that cause some part of RAM to stop refreshing and goes random ?That only applies to DRAM. The calculator uses SRAM (https://en.wikipedia.org/wiki/Static_random-access_memory) which maintains state without the need to refresh.
That only applies to DRAM. The calculator uses SRAM (https://en.wikipedia.org/wiki/Static_random-access_memory) which maintains state without the need to refresh.