Apple-2-SW/dos33fsprogs
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dos33fsprogs/megademo/check_email.s

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; Display e-mail demo
; 40x96 graphics as well as half-screen text manipulation
check_email:
;===================
; init screen
; jsr TEXT
; jsr HOME
bit KEYRESET
;===================
; init vars
lda #0
sta DRAW_PAGE
sta FRAME
sta FRAMEH
init_email_letters:
lda #<em_letters
sta LETTERL
lda #>em_letters
sta LETTERH
lda #18
sta LETTERX
lda #4
sta LETTERY
lda #4
sta LETTERD
;=============================
; Load graphic page0
lda #$0c
sta BASH
lda #$00
sta BASL ; load image to $c00
lda #<email_low
sta GBASL
lda #>email_low
sta GBASH
jsr load_rle_gr
lda #4
sta DRAW_PAGE
jsr gr_copy_to_current ; copy to page1
; GR part
bit PAGE1
bit LORES ; 4
bit SET_GR ; 4
bit FULLGR ; 4
;=============================
; Load graphic page1
lda #$0c
sta BASH
lda #$00
sta BASL ; load image to $c00
lda #<email_high
sta GBASL
lda #>email_high
sta GBASH
jsr load_rle_gr
lda #0
sta DRAW_PAGE
jsr gr_copy_to_current
; GR part
bit PAGE0
; disable interrupt music
sei
;==============================
; setup graphics for vapor lock
;==============================
jsr vapor_lock ; 6
; vapor lock returns with us at beginning of hsync in line
; 114 (7410 cycles), so with 5070 lines to go
jsr gr_copy_to_current ; 6+ 9292
; now we have 322 left
; GR part
bit LORES ; 4
bit SET_GR ; 4
bit FULLGR ; 4
; 322 - 12 = 310
; - 3 for jmp
; 307
; Try X=9 Y=6 cycles=307
ldy #6 ; 2
celoopA:ldx #9 ; 2
celoopB:dex ; 2
bne celoopB ; 2nt/3
dey ; 2
bne celoopA ; 2nt/3
jmp em_begin_loop
.align $100
;================================================
; Email Loop
;================================================
; each scan line 65 cycles
; 1 cycle each byte (40cycles) + 25 for horizontal
; Total of 12480 cycles to draw screen
; Vertical blank = 4550 cycles (70 scan lines)
; Total of 17030 cycles to get back to where was
; For this part we want on Apple II/II+
; On Apple IIe and newer want T 000/11111
; because the font is shifted upwards a line
; T00000000000000000000 G0000000000000000000000
; T00000000000000000000 G0000000000000000000000
; T00000000000000000000 G1111111111111111111111
; T00000000000000000000 G1111111111111111111111
; T11111111111111111111 G0000000000000000000000
; T11111111111111111111 G0000000000000000000000
; T11111111111111111111 G1111111111111111111111
; T11111111111111111111 G1111111111111111111111
; 0,1,0,1 0,0,1,1
; 54,55,54,55 54,54,55,55
em_begin_loop:
em_display_loop:
ldy #24
em_outer_loop:
;== line0
bit PAGE0 ; 4
lda #$54 ; 2
sta draw_line_p1+1 ; 4
jsr draw_line_1 ; 6
;== line1
bit PAGE0 ; 4
lda #$54 ; 2
sta draw_line_p1+1 ; 4
jsr draw_line_1 ; 6
;== line2
bit PAGE0 ; 4
lda #$55 ; 2
sta draw_line_p1+1 ; 4
jsr draw_line_1 ; 6
;== line3
ce_patch:
bit PAGE1 ;IIe ; 4
; bit PAGE0 ;II/II+ ; 4
lda #$55 ; 2
sta draw_line_p1+1 ; 4
jsr draw_line_1 ; 6
;== line4
bit PAGE1 ; 4
lda #$54 ; 2
sta draw_line_p1+1 ; 4
jsr draw_line_1 ; 6
;== line5
bit PAGE1 ; 4
lda #$54 ; 2
sta draw_line_p1+1 ; 4
jsr draw_line_1 ; 6
;== line6
bit PAGE1 ; 4
lda #$55 ; 2
sta draw_line_p1+1 ; 4
jsr draw_line_1 ; 6
;== line7
bit PAGE1 ; 4
lda #$55 ; 2
sta draw_line_p2+1 ; 4
jsr draw_line_2 ; 6
dey ; 2
bne em_outer_loop ; 3
; -1
;======================================================
; We have 4550 cycles in the vblank, use them wisely
;======================================================
; do_nothing should be 4550
; +1 fallthrough from above
; -23 frame count
; -7 timeout
; -10 keypress
; -2 ldy at top
; -132 move letters
; -1038 play_music
; ===========
; 3339
jsr play_music ; 6+1032
; Try X=110 Y=6 cycles=3337 R2
nop ; 2
ldy #6 ; 2
emloop1:ldx #110 ; 2
emloop2:dex ; 2
bne emloop2 ; 2nt/3
dey ; 2
bne emloop1 ; 2nt/3
;=====================
; Update Frame Counter
;=====================
; nowrap = 13+10=23
; wrap = 13+10=23
inc FRAME ; 5
lda FRAME ; 3
cmp #60 ; 1Hz ; 2
beq em_wrap ; 3
em_nowrap:
;-1
lda $0 ; nop ; 3
lda $0 ; nop ; 3
nop ; 2
jmp em_wrap_done ; 3
em_wrap:
lda #0 ; 2
sta FRAME ; 3
inc FRAMEH ; 5
em_wrap_done:
;=========================
; timeout after 20s or so?
;=========================
; 7 cycles
em_timeout:
lda FRAMEH ; 3
cmp #27 ; 2
beq em_done ; 3
; -1
;==================
; move letters
;==================
jsr move_letters ; 6+126
;==================
; check keys
;==================
lda KEYPRESS ; 4
bpl em_no_keypress ; 3
jmp em_done
em_no_keypress:
jmp em_display_loop ; 3
em_done:
bit KEYRESET ; clear keypress ; 4
cli ; enable interrupt music
rts ; 6
;======================
; Draw split line
; with no room for rec/jump at end
draw_line_1: ; line0
; come in with 16
lda $0
bit SET_TEXT ; 4
nop ; 2
nop ; 2
nop ; 2
nop ; 2
nop ; 2
;==============
; 33
nop
nop
bit SET_GR ; 4
draw_line_p1:
bit PAGE0 ; 4
lda $0
lda $0
lda $0
lda $0
; nop
; nop
nop
rts
;==============
; 32
;======================
; Draw split line
; with room for 5 cycles of dec/jump at end
draw_line_2: ; line0
; come in with 16
lda $0 ; 3
bit SET_TEXT ; 4
nop ; 2
nop ; 2
nop ; 2
nop ; 2
nop ; 2
nop
nop
;==============
; 33
bit SET_GR ; 4
draw_line_p2:
bit PAGE0 ; 4
lda $0
lda $0
lda $0
; lda $0
; nop
; nop
; nop
; lda $0
; lda $0
rts
;==============
; 32
em_letters:
; note it is y,x
; .byte 4,4,
.byte "RE: VISIT",128 ; RE: VISIT
.byte 4+128,4,"RE: VISIT",128
.byte 6,4, "DA LA , K MML",128 ; DEATER, KOMMT
.byte 6+128,4,"DE&FEF, K8MMF",128
.byte 7,4, " L !J, I L",128 ; BALD, ICH
.byte 7+128,4," 8&I8, IEH",128
.byte 8,4, " A M SSA J L",128 ; VERMISSE DICH.
.byte 8+128,4,"VEFMISSE 8IEH.",128
.byte 10,4, " F GGYS A",128
.byte 10+128,4," FF8GGYSUE",128 ; FROGGYSUE
.byte 13,10, " /I",128
.byte 13+128,10, " /Y",128
.byte 14,10, " /_I",128
.byte 14+128,4," __ __/_Y", 128
.byte 15,4, " /__] I/",128
.byte 15+128,4," /__] Y/",128
.byte 16,4, "/_____ I\",128
.byte 16+128,4,"/_____EEEE\"
.byte 255
.if 0
em_letters:
; note it is y,x
; .byte 4,4,
.byte "RE: VISIT",128 ; RE: VISIT
.byte 4+128,4,"RE: VISIT",198
.byte 6,4, "DA LA ",128 ; DEATER
.byte 6+128,4,"DE&FEF",198
.byte 7,4, " K MML L !J,",128 ; KOMMT BALD,
.byte 7+128,4," K8MMF 8&I8,",128
.byte 8,4, "ICL A M SSA",128 ; ICH VERMISSE
.byte 8+128,4,"ICH VEFMISSE",128
.byte 9,4, "J CL.",128
.byte 9+128,4,"8ICH.",128 ; DICH.
.byte 11,4, " F GGYS A",128
.byte 11+128,4," FF8GGYSUE",128 ; FROGGYSUE
.byte 13,10, " /I",128
.byte 13+128,10, " /Y",128
.byte 14,4, " __ __/_I",128
.byte 14+128,4," __ __/_Y",128
.byte 15,4, " /__] I/",128
.byte 15+128,4," /__] Y/",128
.byte 16,4, "/_____ I\",128
.byte 16+128,4,"/_____EEEE\"
.byte 255
; note it is y,x
; .byte 4,4,
; .byte "DA LA ",128 ; DEATER
; .byte 4+128,4,"DE&FEF",198
;
; .byte 5,4, " S C !.",128
; .byte 5+128,4,"YS C88I.",128
;
; .byte 7,3, "W M",$22,"SSE J A",128
; .byte 7+128,3,"WYF MGSSEH 8YE",128
;
; .byte 8,3, " A SAS LA KS",128
; .byte 8+128,3,"FEYSESEHEEKS",128
;
; .byte 9,3, "A !",$22,"SA .",128
; .byte 9+128,3,"EYHIOSEH.",128
; .byte 12,4, " /I",128
; .byte 12+128,4," /Y",128
; .byte 13,4, " __ __/_I",128
; .byte 13+128,4," __ __/_Y",128
; .byte 14,4, " /__] I/",128
; .byte 14+128,4," /__] Y/",128
; .byte 15,4, "/_____ I\",128
; .byte 15+128,4,"/_____EEEE\"
; .byte 255
.endif
;.include "email_40_96.inc"
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