From 1c22a99e202cbe11732cddc01e5261d554f4f634 Mon Sep 17 00:00:00 2001
From: John Tsiombikas <nuclear@member.fsf.org>
Date: Mon, 17 Feb 2020 02:14:46 +0200
Subject: [PATCH] initial commit

---
 .gitignore     |    6 +
 Makefile       |   46 +++++++
 src/defs.inc   |   15 +++
 src/draw.asm   |    6 +
 src/glyphs.inc |  382 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/logo.inc   |   20 +++
 src/tiles.inc  |   60 +++++++++
 src/zxtris.asm |  232 ++++++++++++++++++++++++++++++++++
 8 files changed, 767 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Makefile
 create mode 100644 src/defs.inc
 create mode 100644 src/draw.asm
 create mode 100644 src/glyphs.inc
 create mode 100644 src/logo.inc
 create mode 100644 src/tiles.inc
 create mode 100644 src/zxtris.asm

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..84ca4a0
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,6 @@
+*.o
+*.bin
+*.rom
+*.tap
+*.swp
+*.lst
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..56648cc
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,46 @@
+name = zxtris
+src = $(wildcard src/*.asm)
+obj = $(src:.asm=.o)
+bin = $(name).bin
+rom = $(name).rom
+tap = $(name).tap
+
+AS = vasmz80_oldstyle
+ASFLAGS = -Fvobj
+LD = vlink
+LDFLAGS = -b rawbin1
+
+.PHONY: all
+all: tap rom
+
+.PHONY: tap
+tap: $(tap)
+
+.PHONY: rom
+rom: $(rom)
+
+$(bin): $(obj)
+	$(LD) -o $@ $(LDFLAGS) -Ttext 28000 $(obj)
+
+$(rom): $(obj)
+	$(LD) -o $@ $(LDFLAGS) -Ttext 0 $(obj)
+
+$(tap): $(bin)
+	appmake +zx -o $@ --org 28000 --blockname $(name) -b $<
+
+%.o: %.asm
+	$(AS) -o $@ $(ASFLAGS) -L $*.lst $< >/dev/null
+
+zxtris.o: zxtris.asm tiles.inc glyphs.inc logo.inc
+
+.PHONY: clean
+clean:
+	rm -f $(bin) $(rom) $(tap) $(obj) $(obj:.o=.lst)
+
+.PHONY: run
+run: $(tap)
+	fuse-sdl $(tap)
+
+.PHONY: program
+program: $(rom)
+	minipro -p 'AT28C16E @DIP24' -s -w $<
diff --git a/src/defs.inc b/src/defs.inc
new file mode 100644
index 0000000..59fd0b5
--- /dev/null
+++ b/src/defs.inc
@@ -0,0 +1,15 @@
+; vi:filetype=z80:
+
+FB_ADDR		equ $4000
+ATTR_ADDR	equ $5800
+ULA_PORT	equ $fe
+
+TILE_EMPTY	equ 0
+TILE_PFIELD	equ 1
+TILE_BLOCK	equ 2
+TILE_CHESS	equ 3
+TILE_LEFT	equ 4
+TILE_RIGHT	equ 5
+TILE_BOT	equ 6
+TILE_BR		equ 7
+TILE_BL		equ 8
diff --git a/src/draw.asm b/src/draw.asm
new file mode 100644
index 0000000..2022092
--- /dev/null
+++ b/src/draw.asm
@@ -0,0 +1,6 @@
+; vi:filetype=z80:
+	section code,"c"
+	global drawbg
+
+drawbg:
+	ret
diff --git a/src/glyphs.inc b/src/glyphs.inc
new file mode 100644
index 0000000..d4caa4b
--- /dev/null
+++ b/src/glyphs.inc
@@ -0,0 +1,382 @@
+; vi:filetype=z80:
+	section data,"d"
+
+glyph_0:
+	db %00111000
+	db %01001100
+	db %01001100
+	db %01010100
+	db %01100100
+	db %01100100
+	db %00111000
+	db %00000000
+glyph_1:
+	db %00010000
+	db %00110000
+	db %00010000
+	db %00010000
+	db %00010000
+	db %00010000
+	db %00111000
+	db %00000000
+glyph_2:
+	db %00111000
+	db %01000100
+	db %00000100
+	db %00001000
+	db %00010000
+	db %00100000
+	db %01111100
+	db %00000000
+glyph_3:
+	db %00111000
+	db %01000100
+	db %00000100
+	db %00011000
+	db %00000100
+	db %01000100
+	db %00111000
+	db %00000000
+glyph_4:
+	db %00001000
+	db %00011000
+	db %00101000
+	db %01001000
+	db %01111100
+	db %00001000
+	db %00001000
+	db %00000000
+glyph_5:
+	db %01111100
+	db %01000000
+	db %01111000
+	db %00000100
+	db %00000100
+	db %01000100
+	db %00111000
+	db %00000000
+glyph_6:
+	db %00111000
+	db %01000100
+	db %01000000
+	db %01111000
+	db %01000100
+	db %01000100
+	db %00111000
+	db %00000000
+glyph_7:
+	db %01111100
+	db %00000100
+	db %00001000
+	db %00001000
+	db %00010000
+	db %00010000
+	db %00010000
+	db %00000000
+glyph_8:
+	db %00111000
+	db %01000100
+	db %01000100
+	db %00111000
+	db %01000100
+	db %01000100
+	db %00111000
+	db %00000000
+glyph_9:
+	db %00111000
+	db %01000100
+	db %01000100
+	db %00111100
+	db %00000100
+	db %01000100
+	db %00111000
+	db %00000000
+glyph_colon:
+	db %00000000
+	db %00000000
+	db %00010000
+	db %00000000
+	db %00000000
+	db %00010000
+	db %00000000
+	db %00000000
+glyph_a:
+	db %00010000
+	db %00101000
+	db %00101000
+	db %01000100
+	db %01111100
+	db %01000100
+	db %11101110
+	db %00000000
+glyph_b:
+	db %11111000
+	db %01000100
+	db %01000100
+	db %01111100
+	db %01000010
+	db %01000010
+	db %11111100
+	db %00000000
+glyph_c:
+	db %00111100
+	db %01000010
+	db %01000000
+	db %01000000
+	db %01000000
+	db %01000010
+	db %00111100
+	db %00000000
+glyph_d:
+	db %11111000
+	db %01000100
+	db %01000010
+	db %01000010
+	db %01000010
+	db %01000100
+	db %11111000
+	db %00000000
+glyph_e:
+	db %11111110
+	db %01000010
+	db %01001000
+	db %01111000
+	db %01001000
+	db %01000010
+	db %11111110
+	db %00000000
+glyph_f:
+	db %11111110
+	db %01000010
+	db %01001000
+	db %01111000
+	db %01001000
+	db %01000000
+	db %11100000
+	db %00000000
+glyph_g:
+	db %00111100
+	db %01000010
+	db %01000000
+	db %01001110
+	db %01000010
+	db %01000010
+	db %00111100
+	db %00000000
+glyph_h:
+	db %11101110
+	db %01000100
+	db %01000100
+	db %01111100
+	db %01000100
+	db %01000100
+	db %11101110
+	db %00000000
+glyph_i:
+	db %00111000
+	db %00010000
+	db %00010000
+	db %00010000
+	db %00010000
+	db %00010000
+	db %00111000
+	db %00000000
+glyph_j:
+	db %00001110
+	db %00000100
+	db %00000100
+	db %01000100
+	db %01000100
+	db %01000100
+	db %00111000
+	db %00000000
+glyph_k:
+	db %11101100
+	db %01001000
+	db %01010000
+	db %01110000
+	db %01001000
+	db %01000100
+	db %11101110
+	db %00000000
+glyph_l:
+	db %01110000
+	db %00100000
+	db %00100000
+	db %00100000
+	db %00100000
+	db %00100010
+	db %01111110
+	db %00000000
+glyph_m:
+	db %11000110
+	db %01101100
+	db %01101100
+	db %01010100
+	db %01010100
+	db %01000100
+	db %11101110
+	db %00000000
+glyph_n:
+	db %11000110
+	db %01100100
+	db %01010100
+	db %01010100
+	db %01001100
+	db %01000100
+	db %11101110
+	db %00000000
+glyph_o:
+	db %00111100
+	db %01000010
+	db %01000010
+	db %01000010
+	db %01000010
+	db %01000010
+	db %00111100
+	db %00000000
+glyph_p:
+	db %11111000
+	db %01000100
+	db %01000100
+	db %01111000
+	db %01000000
+	db %01000000
+	db %11100000
+	db %00000000
+glyph_q:
+	db %00111100
+	db %01000010
+	db %01000010
+	db %01000010
+	db %01001010
+	db %01000100
+	db %00111010
+	db %00000000
+glyph_r:
+	db %11111000
+	db %01000100
+	db %01000100
+	db %01111000
+	db %01001000
+	db %01000100
+	db %11101110
+	db %00000000
+glyph_s:
+	db %00111100
+	db %01000010
+	db %01000000
+	db %00111100
+	db %00000010
+	db %01000010
+	db %01111100
+	db %00000000
+glyph_t:
+	db %11111110
+	db %10010010
+	db %00010000
+	db %00010000
+	db %00010000
+	db %00010000
+	db %00111000
+	db %00000000
+glyph_u:
+	db %11101110
+	db %01000100
+	db %01000100
+	db %01000100
+	db %01000100
+	db %01000100
+	db %00111000
+	db %00000000
+glyph_v:
+	db %11101110
+	db %01000100
+	db %01000100
+	db %01000100
+	db %00101000
+	db %00101000
+	db %00010000
+	db %00000000
+glyph_w:
+	db %11101110
+	db %01000100
+	db %01000100
+	db %01010100
+	db %01010100
+	db %00101000
+	db %00101000
+	db %00000000
+glyph_x:
+	db %11101110
+	db %01000100
+	db %00101000
+	db %00010000
+	db %00101000
+	db %01000100
+	db %11101110
+	db %00000000
+glyph_y:
+	db %11101110
+	db %01000100
+	db %00101000
+	db %00111000
+	db %00010000
+	db %00010000
+	db %00111000
+	db %00000000
+glyph_z:
+	db %11111110
+	db %10000100
+	db %00001000
+	db %00010000
+	db %00100000
+	db %01000010
+	db %11111110
+	db %00000000
+
+glyph_caps:
+	db %01100000
+	db %10000000
+	db %10000000
+	db %10000111
+	db %01101000
+	db %00000110
+	db %00000001
+	db %00001110
+;glyph_spc:
+;	db %01100000
+;	db %10000000
+;	db %01011000
+;	db %00110101
+;	db %11011010
+;	db %00010010
+;	db %00010010
+;	db %00000001
+glyph_spc:
+	db %00000000
+	db %00000000
+	db %00000000
+	db %00000000
+	db %00000000
+	db %00000000
+	db %10000001
+	db %11111111
+glyph_symb:
+	db %01100000
+	db %10000000
+	db %01100000
+	db %00010110
+	db %11101000
+	db %00000110
+	db %00000001
+	db %00001110
+glyph_enter:
+	db %00000000
+	db %00000000
+	db %00100001
+	db %01100001
+	db %11111111
+	db %01100000
+	db %00100000
+	db %00000000
diff --git a/src/logo.inc b/src/logo.inc
new file mode 100644
index 0000000..f20984a
--- /dev/null
+++ b/src/logo.inc
@@ -0,0 +1,20 @@
+; vi:filetype=z80:
+	section data,"d"
+
+logo:
+	db $3f,$fe,$fc,$fc,$00,$00,$00
+	db $3f,$fe,$fc,$fc,$00,$00,$00
+	db $3f,$fe,$38,$70,$00,$00,$00
+	db $3c,$1c,$38,$70,$00,$00,$00
+	db $30,$30,$1c,$e0,$00,$00,$00
+	db $00,$74,$1c,$e2,$00,$00,$04
+	db $00,$e4,$8f,$c2,$00,$00,$04
+	db $00,$e9,$00,$44,$00,$24,$08
+	db $01,$ca,$39,$14,$30,$e9,$78
+	db $03,$ce,$45,$27,$49,$4e,$88
+	db $06,$11,$48,$cc,$8a,$48,$98
+	db $0e,$91,$33,$b9,$92,$d8,$b0
+	db $1e,$61,$fc,$de,$6f,$e8,$d0
+	db $3f,$0c,$03,$10,$00,$00,$00
+	db $3f,$fe,$f5,$44,$00,$00,$00
+	db $3f,$fe,$f6,$7c,$00,$00,$00
diff --git a/src/tiles.inc b/src/tiles.inc
new file mode 100644
index 0000000..0cfce18
--- /dev/null
+++ b/src/tiles.inc
@@ -0,0 +1,60 @@
+; vi:filetype=z80:
+	section data,"d"
+
+tiles:
+tile_empty:
+	dd $0,$0
+
+tile_pfield:
+	dd $ffffffff, $ffffffff
+
+tile_block:
+	db %11111111
+	db %11111110
+	db %11000110
+	db %11011110
+	db %11011110
+	db %11111110
+	db %11111110
+	db %10000000
+
+tile_chess:
+	db $55,$aa,$55,$aa
+	db $55,$aa,$55,$aa
+
+tile_side_left:
+	db %01010000
+	db %10101000
+	db %01010000
+	db %10101000
+	db %01010000
+	db %10101000
+	db %01010000
+	db %10101000
+
+tile_side_right:
+	db %01110101
+	db %01101010
+	db %01110101
+	db %01101010
+	db %01110101
+	db %01101010
+	db %01110101
+	db %01101010
+
+tile_side_bottom:
+	db $00
+	db $ff, $ff
+	db $aa, $55, $aa, $55, $aa
+
+tile_side_br:
+	db %01110101
+	db %11101010
+	db %11110101
+	db $aa, $55, $aa, $55, $aa
+
+tile_side_bl:
+	db %01010000
+	db %10101011
+	db %01010111
+	db $aa, $55, $aa, $55, $aa
diff --git a/src/zxtris.asm b/src/zxtris.asm
new file mode 100644
index 0000000..651f894
--- /dev/null
+++ b/src/zxtris.asm
@@ -0,0 +1,232 @@
+; vi:filetype=z80:
+	section code,"c"
+
+	include defs.inc
+
+main:
+	call init
+
+	ld hl, FB_ADDR + 25
+	call draw_logo
+	call drawbg
+
+.mainloop:
+	jr .mainloop
+
+init:
+	; setup attributes
+	ld hl, ATTR_ADDR
+	ld a, $47
+	ld b, 24
+.attry:	ld c, 32
+.attrx:	ld (hl), a
+	inc hl
+	dec c
+	jr nz, .attrx
+	dec b
+	jr nz, .attry
+
+	; clear screen
+	ld hl, FB_ADDR
+	xor a
+	ld b, 192
+.clry:	ld c, 32
+.clrx:	ld (hl), a
+	inc hl
+	dec c
+	jr nz, .clrx
+	dec b
+	jr nz, .clry
+
+	; set border
+	out (ULA_PORT), a
+	
+	ret
+
+; expects X -> c, Y -> b, returns in de
+calc_cell_addr:
+	push af
+	sla b
+	sla b		; change from blocks to pixels
+	sla b
+	; construct low address byte -> e
+	ld a, b		; start with Y
+	sla a
+	sla a
+	and $e0		; keep top 3 bits
+	ld e, a		; move into e
+	ld a, c		; a <- X
+	and $1f		; keep low 5 bits
+	or e		; combine with Y bits
+	ld e, a		; move the result back to e
+	; construct high address byte -> d
+	ld a, b		; start with Y again
+	sra a
+	sra a
+	sra a
+	and $18		; keep bits 3 and 4
+	ld d, a		; keep it in d
+	ld a, b		; grap Y one more time
+	and $7		; keep low 3 bits of Y in a
+	or d		; combine with Y6-Y7
+	ld bc, FB_ADDR
+	or b		; combine with high byte of fb address
+	ld d, a		; move result back to d
+	pop af
+	ret
+
+	; hl: dest
+draw_logo:
+	push hl
+	ld de, logo
+	ld b, 16
+.logoy:	ld c, 7
+	push bc
+.logox: ld a, (de)
+	ld (hl), a
+	inc de
+	inc l
+	dec c
+	jr nz, .logox
+	ld bc, 7
+	sbc hl, bc
+	inc h
+
+	ld a, h
+	and $e7
+	ld h, a 
+	and $7
+	jr nz, .skipinc
+	ld a, l
+	add $20
+	ld l, a
+.skipinc:
+	pop bc
+	dec b
+	jr nz, .logoy
+	pop hl
+
+	; attr
+	ld a, h
+	srl a
+	srl a
+	srl a
+	or $58
+	ld h, a
+	ld a, $42
+
+	push hl
+	pop ix
+	ld b, 7
+.sattr:	ld (ix), a
+	ld (ix + 32), a
+	inc ix
+	dec b
+	jr nz, .sattr
+	ret
+
+	; de: dest
+	; a: char
+putchar:
+	; is it a digit?
+	sub '0'
+	ret c
+	cp 11
+	jr nc, .notdigit
+	push bc
+	ld bc, glyph_0
+	jr .common
+.notdigit:
+	; is it A-Z ?
+	sub 'A'-'0'
+	ret c
+	cp 30
+	ret nc
+	push bc
+	ld bc, glyph_a
+.common:
+	push de
+	push hl
+	sla a
+	sla a
+	sla a
+	ld h, 0
+	ld l, a
+	add hl, bc
+	ld c, 8
+.chartop:
+	ld a, (hl)
+	ld (de), a
+	inc d
+	inc hl
+	dec c
+	jr nz, .chartop
+	pop hl
+	pop de
+	pop bc
+	ret
+
+	; de: dest
+	; hl: str
+putstr:
+	push de
+	push bc
+.loop:	xor a
+	ld b, (hl)
+	cp b
+	jr z, .done
+	ld a, b
+	call putchar
+	inc hl
+	inc e
+	jr .loop
+.done:	pop bc
+	pop de
+	ret
+
+	; de: dest
+	; a: number
+putbin8:
+	push de
+	push bc
+	ld b, 8
+.loop:	rlca
+	push af
+	and 1
+	add '0'
+	call putchar
+	pop af
+	inc e
+	dec b
+	jr nz, .loop
+	pop bc
+	pop de
+	ret
+
+putbin5:
+	push de
+	push bc
+	ld b, 5
+	rlca
+	rlca
+	rlca
+	jr putbin8.loop
+
+	; hl: string
+	; return -> a
+strlen:
+	push hl
+	xor a
+	ld b, a
+.loop:	cp (hl)
+	jr z, .done
+	inc hl
+	inc b
+	jr .loop
+.done:	ld a, b
+	pop hl
+	ret
+
+	include glyphs.inc
+	include logo.inc
+	include tiles.inc
-- 
1.7.10.4