mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-07-01 18:29:27 +00:00
358 lines
5.8 KiB
ArmAsm
358 lines
5.8 KiB
ArmAsm
; Display e-mail demo
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; 40x96 graphics as well as half-screen text manipulation
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check_email:
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;===================
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; init screen
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jsr TEXT
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jsr HOME
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bit KEYRESET
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;===================
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; init vars
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lda #0
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sta DRAW_PAGE
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init_email_letters:
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lda #<em_letters
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sta LETTERL
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lda #>em_letters
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sta LETTERH
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lda #18
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sta LETTERX
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lda #4
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sta LETTERY
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lda #4
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sta LETTERD
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;=============================
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; Load graphic page0
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lda #$0c
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sta BASH
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lda #$00
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sta BASL ; load image to $c00
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lda #<email_low
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sta GBASL
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lda #>email_low
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sta GBASH
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jsr load_rle_gr
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lda #4
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sta DRAW_PAGE
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jsr gr_copy_to_current ; copy to page1
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; GR part
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bit PAGE1
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bit LORES ; 4
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bit SET_GR ; 4
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bit FULLGR ; 4
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;=============================
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; Load graphic page1
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lda #$0c
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sta BASH
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lda #$00
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sta BASL ; load image to $c00
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lda #<email_high
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sta GBASL
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lda #>email_high
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sta GBASH
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jsr load_rle_gr
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lda #0
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sta DRAW_PAGE
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jsr gr_copy_to_current
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; GR part
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bit PAGE0
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;==============================
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; setup graphics for vapor lock
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;==============================
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jsr vapor_lock ; 6
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; vapor lock returns with us at beginning of hsync in line
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; 114 (7410 cycles), so with 5070 lines to go
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jsr gr_copy_to_current ; 6+ 9292
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; now we have 322 left
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; GR part
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bit LORES ; 4
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bit SET_GR ; 4
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bit FULLGR ; 4
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; 322 - 12 = 310
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; - 3 for jmp
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; 307
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; Try X=9 Y=6 cycles=307
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ldy #6 ; 2
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celoopA:ldx #9 ; 2
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celoopB:dex ; 2
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bne celoopB ; 2nt/3
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dey ; 2
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bne celoopA ; 2nt/3
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jmp em_begin_loop
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.align $100
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;================================================
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; Email Loop
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;================================================
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; each scan line 65 cycles
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; 1 cycle each byte (40cycles) + 25 for horizontal
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; Total of 12480 cycles to draw screen
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; Vertical blank = 4550 cycles (70 scan lines)
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; Total of 17030 cycles to get back to where was
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; For this part we want on Apple II/II+
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; On Apple IIe and newer want T 000/11111
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; because the font is shifted upwards a line
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; T00000000000000000000 G0000000000000000000000
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; T00000000000000000000 G0000000000000000000000
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; T00000000000000000000 G1111111111111111111111
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; T00000000000000000000 G1111111111111111111111
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; T11111111111111111111 G0000000000000000000000
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; T11111111111111111111 G0000000000000000000000
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; T11111111111111111111 G1111111111111111111111
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; T11111111111111111111 G1111111111111111111111
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; 0,1,0,1 0,0,1,1
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; 54,55,54,55 54,54,55,55
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em_begin_loop:
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em_display_loop:
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ldy #24
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em_outer_loop:
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;== line0
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bit PAGE0 ; 4
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lda #$54 ; 2
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sta draw_line_p1+1 ; 4
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jsr draw_line_1 ; 6
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;== line1
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bit PAGE0 ; 4
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lda #$54 ; 2
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sta draw_line_p1+1 ; 4
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jsr draw_line_1 ; 6
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;== line2
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bit PAGE0 ; 4
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lda #$55 ; 2
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sta draw_line_p1+1 ; 4
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jsr draw_line_1 ; 6
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;== line3
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ce_patch:
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bit PAGE1 ;IIe ; 4
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; bit PAGE0 ;II/II+ ; 4
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lda #$55 ; 2
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sta draw_line_p1+1 ; 4
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jsr draw_line_1 ; 6
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;== line4
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bit PAGE1 ; 4
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lda #$54 ; 2
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sta draw_line_p1+1 ; 4
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jsr draw_line_1 ; 6
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;== line5
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bit PAGE1 ; 4
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lda #$54 ; 2
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sta draw_line_p1+1 ; 4
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jsr draw_line_1 ; 6
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;== line6
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bit PAGE1 ; 4
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lda #$55 ; 2
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sta draw_line_p1+1 ; 4
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jsr draw_line_1 ; 6
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;== line7
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bit PAGE1 ; 4
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lda #$55 ; 2
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sta draw_line_p2+1 ; 4
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jsr draw_line_2 ; 6
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dey ; 2
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bne em_outer_loop ; 3
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; -1
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;======================================================
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; We have 4550 cycles in the vblank, use them wisely
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;======================================================
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; do_nothing should be 4550
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; +1 fallthrough from above
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; -10 keypress
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; -2 ldy at top
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; -132 move letters
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; ===========
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; 4407
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; Try X=13 Y=62 cycles=4403 R4
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nop ; 2
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nop
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ldy #62 ; 2
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emloop1:ldx #13 ; 2
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emloop2:dex ; 2
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bne emloop2 ; 2nt/3
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dey ; 2
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bne emloop1 ; 2nt/3
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jsr move_letters ; 6+126
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lda KEYPRESS ; 4
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bpl em_no_keypress ; 3
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jmp em_start_over
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em_no_keypress:
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jmp em_display_loop ; 3
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em_start_over:
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bit KEYRESET ; clear keypress ; 4
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rts ; 6
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;======================
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; Draw split line
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; with no room for rec/jump at end
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draw_line_1: ; line0
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; come in with 16
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lda $0
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bit SET_TEXT ; 4
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nop ; 2
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nop ; 2
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nop ; 2
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nop ; 2
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nop ; 2
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;==============
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; 33
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nop
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nop
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bit SET_GR ; 4
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draw_line_p1:
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bit PAGE0 ; 4
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lda $0
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lda $0
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lda $0
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lda $0
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; nop
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; nop
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nop
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rts
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;==============
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; 32
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;======================
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; Draw split line
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; with room for 5 cycles of dec/jump at end
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draw_line_2: ; line0
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; come in with 16
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lda $0 ; 3
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bit SET_TEXT ; 4
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nop ; 2
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nop ; 2
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nop ; 2
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nop ; 2
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nop ; 2
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nop
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nop
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;==============
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; 33
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bit SET_GR ; 4
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draw_line_p2:
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bit PAGE0 ; 4
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lda $0
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lda $0
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lda $0
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; lda $0
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; nop
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; nop
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; nop
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; lda $0
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; lda $0
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rts
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;==============
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; 32
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em_letters:
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; note it is y,x
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; .byte 4,4,
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.byte "DA LA ",128 ; DEATER
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.byte 4+128,4,"DE&FEF",198
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.byte 5,4, " S C !.",128 ; IS COOL
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.byte 5+128,4,"YS C88I.",128
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.byte 7,3, "W M",$22,"SSE J A",128
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.byte 7+128,3,"WYF MGSSEH 8YE",128
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.byte 8,3, " A SAS LA KS",128
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.byte 8+128,3,"FEYSESEHEEKS",128
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.byte 9,3, "A !",$22,"SA .",128
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.byte 9+128,3,"EYHIOSEH.",128
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.byte 12,4, " /I",128
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.byte 12+128,4," /Y",128
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.byte 13,4, " __ __/_I",128
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.byte 13+128,4," __ __/_Y",128
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.byte 14,4, " /__] I/",128
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.byte 14+128,4," /__] Y/",128
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.byte 15,4, "/_____ I\",128
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.byte 15+128,4,"/_____EEEE\"
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.byte 255
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.include "email_40_96.inc"
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