SplashData comment removed; no longer true.
Makefile uses wildcard for src/*.s
ShiftZpXLeftByY & ShiftZpXRightByY extracted to bitwise.s
Deleted splash_data.s (adafruit)
Write to OLED buffer via ssd1306_ptr.
WriteLetter tracks screenX canonically in $14, not Y.
WriteLetter tracks screenY canonically in $15, not X.
Read font data via font_ptr.
Display multiple "@" using SsdNextSegment.
font.s moved to font_data.s (makes was for font.s for code).
FontSelectChar in new font.s
Write "HELLO" to second line of display.
FontSelectChar overhauled, fully 16-bit.
SsdNextSegment handles full screen (16-bit addition).
OLED says "HELLO WORLD! - PDA6502".
Ssd1306WriteCharacter subroutine extracted.
encoding.s exports AsciiToPetscii.
Display PDA 6502 and HELLO WORLD with ASCII art.
font_data.s has entire 4K from C64 character ROM.
AsciiToPetscii maps $00..$1F to decorative chars.