diff --git a/README.md b/README.md index 22a041c..e295600 100644 --- a/README.md +++ b/README.md @@ -1333,11 +1333,28 @@ Let's code this up: Since we'll re-use our existing font drawing code `_DrawChar1` at $034C it is always a good idea to document why there is no `RTS` at the end. -Here is a comparison between the original and final version: +Here is a comparison between the original and final version (clock cycle timings are the #'s): + + ORG $0335 (old) ORG $033A (new) + 3 PHA 2 ROL + 2 AND #1F 2 ROL + 2 ASL 2 ROL + 2 ASL 2 TAX + 2 ASL 2 AND #F8 + 2 ADC #Font + 2 ROL 4 STA _LoadFont+2 + 2 ROL - + 2 ROL - + 2 ADC #>Font - + 4 STA _LoadFont+2 - Original Final Bytes 23 18 - Cycles ? TODO ? TODO + Cycles 37 27 Much better!!! @@ -2624,9 +2641,11 @@ That's all folks! Now go write some cool font blitter code. # TODO: - [x] Screenshots! -- [ ] Cleanup all assembly for consistent indentation and alignment (IN PROGRESS) +- [x] Cleanup all assembly for consistent indentation and alignment - [ ] Binary code for 300.bin and 1000.bin so you can load it directly into the emulator - [ ] Disk image: `HGR_FONT.DSK` (In progress) +- [x] Count cycles of old and new DrawCharCol Address Calculation +- [ ] Alternative fonts - [ ] Re-engineer Codepage 437 Font to 7x8 cells: ![font_codepage_437_8x8.png](font_codepage_437_8x8.png) - [ ] Double Hi-Res