kernel/ti/kbd.asm

@@ -19,7 +19,7 @@
 ; *** Code ***
 
 kbdInit:
-	ld	a, 1		; begin with A-Lock on
+	xor	a
 	ld	(KBD_MODS), a
 	ret
 
@@ -84,16 +84,13 @@ kbdGetC:
 	jr	z, .loop	; yes? unsupported. loop.
 	call	.debounce
 	cp	KBD_KEY_ALPHA
-	jr	c, .result	; A < 0x80? valid char, return it.
+	jr	c, .end	; A < 0x80? valid char, return it.
 	jr	z, .handleAlpha
 	cp	KBD_KEY_2ND
 	jr	z, .handle2nd
 	jp	.loop
 .handleAlpha:
-	; Toggle Alpha bit in C. Also, if 2ND bit is set, toggle A-Lock mod.
-	ld	a, 1	; mask for Alpha
-	xor	c
-	ld	c, a
+	set	0, c
 	bit	1, c		; 2nd set?
 	jp	z, .loop	; unset? loop
 	; we've just hit Alpha with 2nd set. Toggle A-Lock and set Alpha to
@@ -104,22 +101,9 @@ kbdGetC:
 	ld	c, a
 	jp	.loop
 .handle2nd:
-	; toggle 2ND bit in C
-	ld	a, 2	; mask for 2ND
-	xor	c
-	ld	c, a
+	set	1, c
 	jp	.loop
 	
-.result:
-	; We have our result in A, *almost* time to return it. One last thing:
-	; Are in in both Alpha and 2nd mode? If yes, then it means that we
-	; should return the upcase version of our letter (if it's a letter).
-	bit	0, c
-	jr	z, .end		; nope
-	bit	1, c
-	jr	z, .end		; nope
-	; yup, we have Alpha + 2nd. Upcase!
-	call	upcase
 .end:
 	pop	hl
 	pop	bc
@@ -136,20 +120,13 @@ kbdGetC:
 	ret
 .debounce:
 	; wait until all keys are de-pressed
-	; To avoid repeat keys, we require 64 subsequent polls to indicate all
-	; depressed keys
 	push	af		; --> lvl 1
-	push	bc		; --> lvl 2
-.pressed:
-	ld	b, 64
 .wait:
 	xor	a
 	call	.get
 	inc	a		; if a was 0xff, will become 0 (nz test)
-	jr	nz, .pressed	; non-zero? something is pressed
-	djnz	.wait
+	jr	nz, .wait	; non-zero? something is pressed
 
-	pop	bc		; <-- lvl 2
 	pop	af		; <-- lvl 1
 	ret
 
@@ -167,9 +144,9 @@ kbdGetC:
 ; alpha table. same as .dtbl, for when we're in alpha mode.
 .atbl:
 	.db	0xfe, 0, 0, 0, 0, 0, 0, 0, 0
-	.db	0xfd, 0x0d, '"' ,'w' ,'r', 'm', 'h', 0, 0
-	.db	0xfb, '?', 0, 'v', 'q', 'l', 'g', 0, 0
-	.db	0xf7, ':', 'z', 'u', 'p', 'k', 'f', 'c', 0
-	.db	0xef, ' ', 'y', 't', 'o', 'j', 'e', 'b', 0
-	.db	0xdf, 0, 'x', 's', 'n', 'i', 'd', 'a', KBD_KEY_ALPHA
+	.db	0xfd, 0x0d, '"' ,'W' ,'R', 'M', 'H', 0, 0
+	.db	0xfb, '?', 0, 'V', 'Q', 'L', 'G', 0, 0
+	.db	0xf7, ':', 'Z', 'U', 'P', 'K', 'F', 'C', 0
+	.db	0xef, ' ', 'Y', 'T', 'O', 'J', 'E', 'B', 0
+	.db	0xdf, 0, 'X', 'S', 'N', 'I', 'D', 'A', KBD_KEY_ALPHA
 	.db	0xbf, 0, 0, 0, 0, 0, KBD_KEY_2ND, 0, 0x7f

kernel/ti/lcd.asm

@@ -153,6 +153,13 @@ lcdSendGlyph:
 	ld	a, (LCD_CURCOL)
 	call	lcdSetCol
 
+	; let's increase (and wrap) col now
+	inc	a
+	ld	(LCD_CURCOL), a
+	cp	16
+	jr	nz, .skip
+	call	lcdLinefeed
+.skip:
 	ld	b, FNT_HEIGHT
 .loop:
 	ld	a, (hl)
@@ -160,14 +167,6 @@ lcdSendGlyph:
 	call	lcdData
 	djnz	.loop
 
-	; Increase column and wrap if necessary
-	ld	a, (LCD_CURCOL)
-	inc	a
-	ld	(LCD_CURCOL), a
-	cp	16
-	jr	nz, .skip
-	call	lcdLinefeed
-.skip:
 	pop	hl
 	pop	bc
 	pop	af
@@ -241,8 +240,6 @@ lcdClrScr:
 lcdPutC:
 	cp	ASCII_LF
 	jp	z, lcdLinefeed
-	cp	ASCII_BS
-	jr	z, .bs
 	push	hl
 	call	fntGet
 	jr	nz, .end
@@ -250,11 +247,3 @@ lcdPutC:
 .end:
 	pop	hl
 	ret
-.bs:
-	ld	a, (LCD_CURCOL)
-	or	a
-	ret	z	; going back one line is too complicated.
-			; not implemented yet
-	dec	a
-	ld	(LCD_CURCOL), a
-	ret

recipes/ti84/README.md

@@ -1,6 +1,6 @@
 # TI-84+
 
-**This is a work-in-progress**
+**This is a work-in-progress, this is far from complete.**
 
 ## Recipe
 
@@ -25,7 +25,7 @@ You will start with a blank screen, it's normal, you haven't pressed the "ON"
 key yet. This key is mapped to F12 in the emulator. Once you press it, the
 Collapse OS prompt will appear.
 
-See z80e's `KEYBINDINGS.md` file for details.
+**WIP: the keyboard does nothing else than halting the CPU for now.**
 
 ## Upload to the calculator
 
@@ -51,29 +51,6 @@ Press "1" to continue.
 
 When this is done, you can press the ON button to see Collapse OS' prompt!
 
-## Usage
-
-The shell works like a normal shell, but with very tight screen space.
-
-When pressing a "normal" key, it spits the symbol associated to it depending
-on the current mode. In normal mode, it spits the digit/symbol. In Alpha mode,
-it spits the letter. In Alpha+2nd, it spits the uppercase letter.
-
-Special keys are Alpha and 2nd. Pressing them toggles the associated mode.
-Alpha and 2nd mode don't persist for more than one character. After the
-character is spit, mode reset to normal.
-
-Pressing 2nd then Alpha will toggle the A-Lock mode, which is a persistent mode.
-The A-Lock mode makes Alpha enabled all the time. While A-Lock mode is enabled,
-you have to enable Alpha to spit a digit/symbol.
-
-Simultaneous keypresses have undefined behavior. One of the keys will be
-registered as pressed. Mode key don't work by simultaneously pressing them with
-a "normal" key. The presses must be sequential.
-
-Keys that aren't a digit, a letter, a symbol that is part of 7-bit ASCII or one
-of the two mode key have no effect.
-
 [knightos]: https://knightos.org/
 [z80e]: https://github.com/KnightOS/z80e
 [mktiupgrade]: https://github.com/KnightOS/mktiupgrade