.equ MMODE_VAL_INPUT, 1
.equ MMODE_EDIT_VAL, 2
.equ MMODE_GOTO, 3
+.equ MMODE_START_MENU, 4
+.equ MMODE_GOTO_PREDEF, 5
+.equ predef_addr_cnt, ((predef_addrs_end-predef_addrs)/4)
##################################################
# #
##################################################
-/* Write val to VDP register reg */
-.macro write_vdp_reg reg val
- move.w #((\reg << 8) + 0x8000 + \val),(a3)
+# Write val to VDP register reg
+.macro write_vdp_r_dst reg val dst
+ move.w #((\reg << 8) + 0x8000 + \val),\dst
.endm
+# Write val to VDP register reg, vdp addr in a3
+.macro write_vdp_reg reg val
+ write_vdp_r_dst \reg, \val, (a3)
+.endm
/* For immediate addresses */
.macro VRAM_ADDR reg adr
move.l #(((0x4000 + (\adr & 0x3fff)) << 16) + (\adr >> 14)),\reg
.endm
-
.macro CRAM_ADDR reg adr
move.l #(((0xc000 + (\adr & 0x3fff)) << 16) + (\adr >> 14)),\reg
.endm
or.w #(\mode_back<<11)|(\mode_new<<8),d7
.endm
+.macro menu_text str x y pal
+ lea \str,a0
+ move.l #\x,d0
+ move.l #\y,d1
+ move.l #0x8000|(\pal<<13),d2
+ jsr print
+.endm
+
#################################################
# #
# DATA #
dc.w 0; dc.b 0x05; dc.b 0; dc.w 0x6002; dc.w 0
sprite_data_end:
+predef_addrs:
+ dc.l 0x000000, 0x200000, 0x400000, 0xa00000, 0xa10000
+ dc.l 0xa11100, 0xa12000, 0xa13000, 0xc00000
+predef_addrs_end:
+
+safe_addrs:
+ dc.l 0x000000, 0x7fffff
+ dc.l 0xe00000, 0xffffff
+ dc.l 0xa00000, 0xa163ff /* FIXME */
+ /* TODO: VDP */
+safe_addrs_end:
+
txt_edit:
.ascii "- edit -\0"
txt_a_confirm:
.ascii "A-confirm\0"
+txt_about:
+ .ascii "hexed r1\0"
+txt_goto:
+ .ascii "Go to address\0"
+txt_goto_predef:
+ .ascii "Go to (predef)\0"
+txt_dtack:
+ .ascii "DTACK safety\0"
##################################################
# #
# MAIN PROGRAM #
# #
##################################################
-
+
+# global regs:
+# a6 = page_start[31:8]|cursor_offs[7:0]
+# d7 = old_inputs[31:16]|edit_bytes[15:14]|g_mode_old[13:11]|g_mode[10:8]|irq_cnt[7:0]
+# d6 = edit_word_save[31:15]|edit_done[7]|no_dtack_detect[4]|autorep_cnt[3:0]
+# d5 = main: tmp
+# edit: edit_word[31:8]|edit_pos[4:2]|byte_cnt[1:0]
+# menu: sel
+
.align 2
main:
/* mask irqs during init */
move.w #0x2700,sr
+.if 0
+ /* copy */
+ lea (0,pc),a0
+ move.l a0,d0
+ swap d0
+ lsr.l #4,d0
+ and.b #0x0f,d0
+ cmp.b #0,d0
+ bne 0f
+
+ move.w #8000/2,d0
+ move.l #0,a0
+ move.l #0x400000,a1
+1:
+ move.w (a0)+,(a1)+
+ dbra d0,1b
+0:
+.endif
+
movea.l #0,a6
move.l #0x8000,d7
moveq.l #0,d6
move.w #0x2000,sr
##################################################
-# #
-# MAIN LOOP #
-# #
-##################################################
-
-# global regs:
-# a6 = page_start[31:8]|cursor_offs[7:0]
-# d7 = old_inputs[31:16]|edit_bytes[15:14]|g_mode_old[13:11]|g_mode[10:8]|irq_cnt[7:0]
-# d6 = edit_word_save[31:15]|edit_done[7]|autorep_cnt[3:0]
-# d5 = edit_word[31:8]|edit_pos[4:2]|byte_cnt[1:0]; tmp in main mode
forever:
jsr wait_vsync
bra forever
-
VBL:
dc.l mode_val_input
dc.l mode_edit_val /* edit val in editor */
dc.l mode_goto
- dc.l mode_main
- dc.l mode_main
+ dc.l mode_start_menu
+ dc.l mode_goto_predef
dc.l mode_main
dc.l mode_main
add.b #27-1,d1 /* line where the cursor sits */
swap d1
- movea.l #0xe004,a2
+ movea.l #0xe002,a2
move.l #27-1,d5 /* line counter for dbra */
or.l d1,d5
-draw_column:
+draw_row:
move.l a2,a0
jsr load_prepare
+ btst.l #15,d7
+ beq 0f
+ move.w #' ',(a0)
+0:
/* addr */
move.l a1,d2
moveq.l #6,d3
jsr print_hex_preped
+ btst.l #4,d6
+ bne draw_row_safe
+
+ bsr is_addr_safe
+ bne draw_row_safe
+
+# draw unreadable areas
+ btst.l #15,d7
+ bne draw_row_unsafe_words
+
+draw_row_unsafe_bytes:
+ /* 8 bytes */
+ moveq.l #8-1,d4
+0:
+ move.w #' ',(a0)
+ move.l #'?'|('?'<<16),(a0)
+ dbra d4,0b
+
+ move.w #' ',(a0)
+
+ move.l d5,d0
+ swap d0
+ cmp.w d5,d0
+ beq draw_cursor_unsafe_byte
+ bra draw_chars_unsafe
+
+draw_row_unsafe_words:
+ /* 4 shorts */
+ moveq.l #4-1,d4
+0:
+ move.w #' ',(a0)
+ move.l #'?'|('?'<<16),(a0)
+ move.l #'?'|('?'<<16),(a0)
+ dbra d4,0b
+
+ move.l #(' '<<16)|' ',(a0)
+
+ move.l d5,d0
+ swap d0
+ cmp.w d5,d0
+ beq draw_cursor_unsafe_word
+
+draw_chars_unsafe:
+ move.l #'?'|('?'<<16),(a0)
+ move.l #'?'|('?'<<16),(a0)
+ move.l #'?'|('?'<<16),(a0)
+ move.l #'?'|('?'<<16),(a0)
+
+ move.l #(' '<<16)|' ',(a0)
+ addq.l #8,a1
+ add.w #0x80,a2
+ dbra d5,draw_row
+ bra draw_status_bar
+
+
+# normal draw
+draw_row_safe:
+ btst.l #15,d7
+ bne draw_row_words
+
+draw_row_bytes:
+ /* 8 bytes */
+ moveq.l #2,d3
+ moveq.l #8-1,d4
+draw_bytes:
+ move.w #' ',(a0)
+ move.b (a1)+,d2
+ jsr print_hex_preped
+ dbra d4,draw_bytes
+
+ move.w #' ',(a0)
+
+ move.l d5,d0
+ swap d0
+ cmp.w d5,d0
+ beq draw_cursor_byte
+ bra draw_chars_pre
+
+draw_row_words:
/* 4 shorts */
moveq.l #4,d3
moveq.l #4-1,d4
-draw_shorts:
+draw_words:
move.w #' ',(a0)
move.w (a1)+,d2
jsr print_hex_preped
- dbra d4,draw_shorts
+ dbra d4,draw_words
+
+ move.l #(' '<<16)|' ',(a0)
move.l d5,d0
swap d0
cmp.w d5,d0
- beq draw_cursor
+ beq draw_cursor_word
draw_chars_pre:
- move.l #(' '<<16)|' ',(a0)
-
/* 8 chars */
subq.l #8,a1
moveq.l #8-1,d4
move.w d0,(a0)
dbra d4,draw_chars
+ move.l #(' '<<16)|' ',(a0)
+
add.w #0x80,a2
- dbra d5,draw_column
+ dbra d5,draw_row
+draw_status_bar:
/* status bar */
- movea.l #0xe004+64*2*27,a0
+ move.l a2,a0
jsr load_prepare
+
+ btst.l #15,d7
+ beq 0f
+ move.w #' ',(a0)
+0:
mk_a6_addr d2
move.l #0x4006,d3
jsr print_hex_preped
+ move.w #' ',(a0)
/* handle input */
jsr get_input /* x0cbrldu x1sa00du */
beq input_noc
change_mode MMODE_EDIT_VAL, MMODE_MAIN
- write_vdp_reg 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320 | VDP12_STE)
+ write_vdp_r_dst 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320 | VDP12_STE),(GFXCNTL)
input_noc:
- btst.l #5,d0 /* Start - goto */
+ btst.l #5,d0 /* Start - menu */
beq input_nos
- change_mode MMODE_GOTO, MMODE_MAIN
- write_vdp_reg 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320 | VDP12_STE)
+ moveq.l #0,d5
+ change_mode MMODE_START_MENU, MMODE_MAIN
+ write_vdp_r_dst 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320 | VDP12_STE),(GFXCNTL)
input_nos:
vbl_end:
rte
-draw_cursor:
+draw_cursor_unsafe_byte:
+ move.l a6,d0
+ and.l #7,d0 /* byte offs */
+ move.b d0,d1
+ add.b d0,d0
+ add.b d1,d0 /* d0 *= 3 (chars) */
+ add.b d0,d0
+ lea (7*2,a2,d0),a0
+ jsr load_prepare
+ move.l #(0x2000|'?'|((0x2000|'?')<<16)),(a0)
+
+ move.l a2,a0
+ add.w #31*2,a0
+ jsr load_prepare /* restore a0 */
+ jmp draw_chars_unsafe
+
+draw_cursor_unsafe_word:
move.l a6,d0
and.l #7,d0 /* byte offs */
move.l d0,d1
move.b d1,d2
lsl.b #2,d2
add.b d2,d1 /* num of chars to skip */
- lsl.b #1,d1
- move.w #0x2004,d3
+ add.b d1,d1
+
+ lea (8*2,a2,d1),a0
+ jsr load_prepare
+ move.l #(0x2000|'?'|((0x2000|'?')<<16)),d0
+ move.l d0,(a0)
+ move.l d0,(a0)
+
+ move.l a2,a0
+ add.w #29*2,a0
+ jsr load_prepare /* restore a0 */
+ jmp draw_chars_unsafe
- btst.l #15,d7
- bne draw_cursor_word
draw_cursor_byte:
+ move.l a6,d0
+ and.l #7,d0 /* byte offs */
+ move.w #0x2002,d3
+
move.b (-8,a1,d0),d2
- and.b #1,d0
- lsl.b #2,d0
- add.b d0,d1
- subq.b #2,d3
- bra 0f
+ move.b d0,d1
+ add.b d0,d0
+ add.b d1,d0 /* d0 *= 3 (chars) */
+ add.b d0,d0
+ lea (7*2,a2,d0),a0
+ jsr load_prepare
+ jsr print_hex_preped
+
+ move.l a2,a0
+ add.w #31*2,a0
+ jsr load_prepare /* restore a0 */
+
+ jmp draw_chars_pre
draw_cursor_word:
+ move.l a6,d0
+ and.l #7,d0 /* byte offs */
+ move.l d0,d1
+ lsr.b #1,d1 /* which word */
+ move.b d1,d2
+ lsl.b #2,d2
+ add.b d2,d1 /* num of chars to skip */
+ add.b d1,d1
+ move.w #0x2004,d3
+
move.w (-8,a1,d0),d2
-0:
- lea (7*2,a2,d1),a0
+ lea (8*2,a2,d1),a0
jsr load_prepare
jsr print_hex_preped
move.l a2,a0
- add.w #26*2,a0
+ add.w #29*2,a0
jsr load_prepare /* restore a0 */
jmp draw_chars_pre
jmp vbl_end
+################### start menu ###################
+
+mode_start_menu:
+ /* frame */
+ bsr start_menu_box
+
+ /* text */
+ menu_text txt_about, 13, 9, 1
+ menu_text txt_goto, 13, 11, 0
+ menu_text txt_goto_predef, 13, 12, 0
+ menu_text txt_dtack, 13, 13, 0
+ menu_text txt_a_confirm, 13, 15, 2
+
+ /* dtack safety on/off */
+ movea.l #0xe000+26*2+13*64*2,a0
+ jsr load_prepare
+ move.w #0x8000|'O',(a0)
+ btst.l #4,d6
+ bne 0f
+ move.w #0x8000|'N',(a0)
+ bra 1f
+0:
+ move.w #0x8000|'F',(a0)
+ move.w #0x8000|'F',(a0)
+1:
+
+ /* cursor */
+ movea.l #0xe000+11*2+11*64*2,a0
+ moveq.l #0,d0
+ move.b d5,d0
+ and.b #3,d0
+ lsl.w #7,d0
+ add.w d0,a0
+ jsr load_prepare
+ move.w #'>',(a0)
+
+ /* input */
+ jsr get_input /* x0cbrldu x1sa00du */
+
+ move.w d0,d1
+ and.w #3,d1
+ beq msm_no_ud
+ move.b d5,d1
+ and.b #3,d1
+ btst.l #0,d0
+ sne d2
+ or.b #1,d2 /* up -1, down 1 */
+ add.b d2,d1
+ cmp.b #0,d1
+ bge 0f
+ move.b #2,d1
+0:
+ cmp.b #2,d1
+ ble 0f
+ move.b #0,d1
+0:
+ and.b #0xfc,d5
+ or.b d1,d5
+ jmp vbl_end
+
+msm_no_ud:
+ btst.l #4,d0 /* A - confirm */
+ beq msm_no_a
+ move.b d5,d1
+ and.b #3,d1
+ bne 0f
+ change_mode MMODE_GOTO, MMODE_MAIN
+ bsr start_menu_box
+ jmp vbl_end
+0:
+ cmp.b #1,d1
+ bne 0f
+ moveq.l #0,d5
+ change_mode MMODE_GOTO_PREDEF, MMODE_MAIN
+ bsr start_menu_box
+ jmp vbl_end
+0:
+ cmp.b #2,d1
+ bne 0f
+ bchg.l #4,d6
+ jmp vbl_end
+0:
+
+msm_no_a:
+ move.w d0,d1
+ and.w #0x3000,d1
+ beq msm_no_bc
+ bra return_to_main
+
+msm_no_bc:
+ jmp vbl_end
+
+start_menu_box:
+ movea.l #0xe000+10*2+8*64*2,a1
+ move.w #9-1,d1
+0:
+ move.w a1,a0
+ jsr load_prepare
+ move.w #20-1,d0
+1:
+ move.w #0,(a0)
+ dbra d0,1b
+
+ add.w #64*2,a1
+ dbra d1,0b
+ rts
+
+################### goto predef ##################
+
+mode_goto_predef:
+ /* frame */
+ movea.l #0xe000+14*2+8*64*2,a1
+ move.l #predef_addr_cnt+2-1,d1
+0:
+ move.w a1,a0
+ jsr load_prepare
+ moveq.l #10-1,d0
+1:
+ move.w #0,(a0)
+ dbra d0,1b
+
+ add.w #64*2,a1
+ dbra d1,0b
+
+ /* draw addresses */
+ movea.l #0xe000+17*2+9*64*2,a1
+ lea predef_addrs,a2
+ move.w #predef_addr_cnt-1,d4
+ move.l #0x8006,d3
+mgp_da_loop:
+ move.w a1,a0
+ jsr load_prepare
+ move.l (a2)+,d2
+ jsr print_hex_preped
+ add.w #64*2,a1
+ dbra d4,mgp_da_loop
+
+ /* cursor */
+ movea.l #0xe000+15*2+9*64*2,a0
+ moveq.l #0,d0
+ move.b d5,d0
+ lsl.w #7,d0
+ add.w d0,a0
+ jsr load_prepare
+ move.w #'>',(a0)
+
+ /* input */
+ jsr get_input /* x0cbrldu x1sa00du */
+
+ move.w d0,d1
+ and.w #3,d1
+ beq mgp_no_ud
+ btst.l #0,d0
+ sne d2
+ or.b #1,d2 /* up -1, down 1 */
+ add.b d2,d5
+ cmp.b #0,d5
+ bge 0f
+ move.b #predef_addr_cnt-1,d5
+0:
+ cmp.b #predef_addr_cnt-1,d5
+ ble 0f
+ move.b #0,d5
+0:
+ jmp vbl_end
+
+mgp_no_ud:
+ btst.l #4,d0 /* A - confirm */
+ beq mgp_no_a
+ moveq.l #0,d0
+ move.b d5,d0
+ lsl.w #2,d0
+ lea predef_addrs,a0
+ move.l (a0,d0),d5
+ lsl.l #8,d5
+ jmp mode_goto_finish
+
+mgp_no_a:
+ move.w d0,d1
+ and.w #0x3000,d1
+ beq mgp_no_bc
+ bra return_to_main
+
+mgp_no_bc:
+ jmp vbl_end
+
+
# go back to main mode
return_to_main:
bclr.l #7,d6 /* not edited */
change_mode MMODE_MAIN, MMODE_MAIN
- write_vdp_reg 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320)
+ write_vdp_r_dst 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320),(GFXCNTL)
jmp vbl_end
rts
+# determine if address packed in a6 is safe
+# a1 - address to check
+# destroys d0-d2, strips upper bits from a1
+is_addr_safe:
+ move.l a1,d1
+ lsl.l #8,d1
+ lsr.l #8,d1
+ lea safe_addrs,a1
+ move.w #(safe_addrs_end - safe_addrs)/8-1,d2
+0:
+ move.l (a1)+,d0
+ cmp.l d0,d1
+ blt 1f
+ move.l (a1),d0
+ cmp.l d0,d1
+ ble addr_safe
+1:
+ addq.l #4,a1
+ dbra d2,0b
+
+addr_unsafe:
+ move.l d1,a1
+ moveq.l #0,d0
+ rts
+
+addr_safe:
+ move.l d1,a1
+ moveq.l #1,d0
+ rts
+
+
# read single phase from controller
# #a0 - addr
# d0 - result
addq.b #1,d6
move.b d6,d2
- and.b #7,d2 /* do autorepeat every 8 frames */
- cmp.b #7,d2
+ and.b #0x0f,d2 /* do autorepeat */
+ cmp.b #9,d2
bne 1f
move.w d0,d1
0:
- and.b #0xf8,d6
+ and.b #0xf0,d6
1:
swap d0
move.w d1,d0
# d0 - x
# d1 - y
# d2 - value
-# d3 - digit_cnt[0:7]|tile_bits[11:15]
+# d3 - tile_bits[15:11]|digit_cnt[7:0]
# destroys a0, preserves d3
print_hex:
notaz.gp2x.de / megadrive.git / commitdiff