TI-84 Plus LCD Port Reference ([Really] Abridged)

Z80 Ports: $10: Command Register ; $11 = Data Register
All reads/writes are 16-bits, in big-endian format. Two in/outs req'd.
Command register is 8 bit, but must send 16 bits; do by duping send.
Most commands have bitmap arguments. Prefix % means binary, $ is hex.
DOCUMENTATION IS ADJUSTED FOR INSTALLED SCREEN ORIENTATION FOR CALC.
ALL REFERENCES OF POSITIONING (HORIZ/VERT) ADJUSTED FOR THIS.

Code example: To set default entry mode:
  ld a,$03 \ out ($10),a \  out ($10),a
  ld hl,DEFAULTVALUE \ ld c,$11 \  out (c),h \  out (c),L

COMMAND $01 (Driver Output Control)
 FEDCBA9876543210
 -----I-S--------
I: Set to enable interlace mode. Important for partial image display trick.
S: Set to flip the screen along vertical axis.

COMMAND $03 (Entry Mode)
 FEDCBA9876543210
 TD-B----O-IIA---
TD: Color transfer and mapping. Set both bits to zero for our purposes.
B: BGR swap. 0=RGB,1=BGR
O: Origin Adr. 0=manual positioning. 1=reset pos to win corner on manual pos chng
I: inc/dec modes. Set to both 1's for increment move and increment wrap
   bit 4:inc/dec on line wrap; bit 3:inc/dec on mov't on current line
A: h/v mode. 0=vertical 1=horizontal.
Suggestions: Set II and A to all 1's for horizontal aligned goodness.

COMMAND $07 (Display Control 1)
 FEDCBA9876543210
 --PP---B--GDC-SS
SS: On-off controls. Leave at %11. Too complicated to actually turn off
C: Color mode. Set to enable 8-bit color mode. Just leave this off.
GD: %11 for norm display. Complicated otherwise
B: Base image display. Turn off if using partial image display trick.
PP: Set to enable partial display. bit D: pdisp2, bit C: pdisp1

COMMAND $20/$21 (y/x adr)
 $20: max:239 ; $21: max:319
 Sets cursor position. If origin adr bit set, resets x/y to win corner start

COMMAND $22 (Write Data)
 Outputs data to screen depending on all previously selected settings.
 Autoadjusts cursor depending on display control settings

COMMAND $23 (Read Data)
 Reads data from data register. Requires 2 byte dummy read before next read
 is valid. Cursor is NOT changed. Used to facilitate read/write cycles.

COMMAND $50/$51/$52/$53 (Windowing mode boundary set)
 Sets window mode boundaries. Numbers specified are inclusive.
 $50: Ymin (0) ; $51: Ymax (239) ; $52: Xmin (0) ; $53: Xmax (319)

COMMAND $80,$81,$82 (Partial Image 1 Display Settings)
 All values are column numbers (0-319) where...
 $80: Onscreen start ; $81: GRAM start ; $82: GRAM end [($81)<=($82)]

COMMAND $83,$84,$85 (Partial Image 2 Display Settings)
 All values are column numbers (0-319) where...
 $83: Onscreen start ; $84: GRAM start ; $85: GRAM end [($84)<=($85)]