.equ MMODE_START_MENU, 4
.equ MMODE_GOTO_PREDEF, 5
.equ MMODE_JMP_ADDR, 6
+.equ MMODE_DUMP, 7
.equ predef_addr_cnt, ((predef_addrs_end-predef_addrs)/4)
# Set up address in VDP, control port in dst
.macro VRAM_ADDR adr dst
- move.l #(((0x4000 | (\adr & 0x3fff)) << 16) | (\adr >> 14)),\dst
+ move.l #(0x40000000 | ((\adr & 0x3fff) << 16) | (\adr >> 14)),\dst
+.endm
+
+.macro VSRAM_ADDR adr dst
+ move.l #(0x40000010 | ((\adr & 0x3fff) << 16) | (\adr >> 14)),\dst
.endm
or.w #(\mode_back<<11)|(\mode_new<<8),d7
.endm
+# destroys a0,d0-d2
.macro menu_text str x y pal
lea (\str,pc),a0
move.l #\x,d0
dc.l 0xa13000, 0xa130ff
safe_addrs_end:
+transfer_mode:
+ dc.l 0x000000 /* 1 for recv */
+transfer_addr:
+ dc.l 0x000000
+transfer_len:
+ dc.l 0x000800
+
txt_edit:
.ascii "- edit -\0"
txt_a_confirm:
.ascii "Go to (predef)\0"
txt_jmp_addr:
.ascii "Jump to address\0"
+txt_dump:
+ .ascii "Transfer\0"
txt_dtack:
.ascii "DTACK safety\0"
+txt_ready_send:
+ .ascii "Ready to send\0"
+txt_ready_recv:
+ .ascii "Ready to recv\0"
+txt_working:
+ .ascii "Working.. \0"
txt_dtack_err:
.ascii "DTACK err?\0"
txt_exc:
/* mask irqs during init */
move.w #0x2700,sr
-.if RELOCATE_TO_RAM
- lea (0,pc),a0
- move.l a0,d0
- swap d0
- lsr.b #4,d0
- and.b #0x0f,d0
- cmp.b #0,d0
+.if 0
+ /* copy to expansion device if magic number is set */
+ move.l #0x400000,a1
+ cmp.w #0x1234,(a1)
bne 0f
- /* copy, assume 8K size */
+ move.l #0,a0
move.w #0x2000/8-1,d0
+1:
+ move.l (a0)+,(a1)+
+ move.l (a0)+,(a1)+
+ dbra d0,1b
+0:
+.endif
+
+.if RELOCATE_TO_RAM
+ /* copy, assume 8K size */
move.l #0,a0
move.l #0xFF0100,a1
+ move.w #0x2000/8-1,d0
1:
move.l (a0)+,(a1)+
move.l (a0)+,(a1)+
dbra d0,1b
-0:
+
lea (0f,pc),a0
add.l #0xFF0100,a0
jmp (a0)
/* Initialize VDP */
jsr init_gfx
+ /* Clear h/v scroll */
+ movea.l #GFXDATA,a0
+ VRAM_ADDR 0x8000,(GFXCNTL)
+ move.l #0,(a0)
+ VSRAM_ADDR 0,(GFXCNTL)
+ move.l #0,(a0)
+
/* Load color data */
movea.l #0,a0
lea (colors,pc),a1
bra mode_start_menu
bra mode_goto_predef
bra mode_jmp_addr
- bra mode_main
+ bra mode_transfer
##################### main #######################
menu_text txt_goto, 13, 11, 0
menu_text txt_goto_predef, 13, 12, 0
menu_text txt_jmp_addr, 13, 13, 0
- menu_text txt_dtack, 13, 14, 0
- menu_text txt_a_confirm, 13, 16, 2
+ menu_text txt_dump, 13, 14, 0
+ menu_text txt_dtack, 13, 15, 0
+ menu_text txt_a_confirm, 13, 17, 2
/* dtack safety on/off */
- movea.l #0xe000+26*2+14*64*2,a0
+ movea.l #0xe000+26*2+15*64*2,a0
jsr load_prepare
move.w #0x8000|'O',(a0)
btst.l #4,d6
movea.l #0xe000+11*2+11*64*2,a0
moveq.l #0,d0
move.b d5,d0
- and.b #3,d0
+ and.b #7,d0
lsl.w #7,d0
add.w d0,a0
jsr load_prepare
and.w #3,d1
beq msm_no_ud
move.b d5,d1
- and.b #3,d1
+ and.b #7,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 #3,d1
+ move.b #4,d1
0:
- cmp.b #3,d1
+ cmp.b #4,d1
ble 0f
move.b #0,d1
0:
- and.b #0xfc,d5
+ and.b #0xf8,d5
or.b d1,d5
bra vbl_end
btst.l #4,d0 /* A - confirm */
beq msm_no_a
move.b d5,d1
- and.b #3,d1
+ and.b #7,d1
bne 0f
change_mode MMODE_GOTO, MMODE_MAIN
bsr start_menu_box
0:
cmp.b #3,d1
bne 0f
+ change_mode MMODE_DUMP, MMODE_MAIN
+ bsr start_menu_box
+ bra vbl_end
+0:
+ cmp.b #4,d1
+ bne 0f
bchg.l #4,d6
bra vbl_end
0:
start_menu_box:
movea.l #0xe000+10*2+8*64*2,a1
- move.w #10-1,d1
+ move.w #11-1,d1
0:
move.w a1,a0
jsr load_prepare
move.l d5,a0
jmp (a0)
+################### transfer #####################
+
+mode_transfer:
+ move.b #0x40,(0xa1000b).l
+ move.b #0x40,(0xa10005).l
+
+ move.l (transfer_mode,pc),d0
+ tst.l d0
+ bne 0f
+ lea (txt_ready_send,pc),a0
+ bra 1f
+0:
+ lea (txt_ready_recv,pc),a0
+1:
+ move.l #13,d0
+ move.l #13,d1
+ move.l #0x8000,d2
+ jsr print
+
+wait_tl_low0:
+ move.b (0xa10005),d0
+ btst.b #4,d0
+ bne wait_tl_low0
+
+ menu_text txt_working, 13, 13, 0
+
+ lea 0xa10005,a1
+ move.l (transfer_addr,pc),a0
+ move.l (transfer_len,pc),d2
+
+ move.l (transfer_mode,pc),d0
+ tst.l d0
+ bne transfer_recv
+
+transfer_send:
+ move.b #0x4f,(0xa1000b).l
+
+tr_send_loop:
+ move.b (a0),d1
+ and.b #0x0f,d1
+
+wait_tl_low1:
+ move.b (a1),d0
+ btst.b #4,d0
+ bne wait_tl_low1
+
+ move.b d1,(a1) /* clears TH and writes data */
+
+ move.b (a0)+,d1
+ lsr.b #4,d1
+ bset.b #6,d1 /* prepare TH */
+
+wait_tl_hi1:
+ move.b (a1),d0
+ btst.b #4,d0
+ beq wait_tl_hi1
+
+ move.b d1,(a1)
+ subq.l #1,d2
+ bne tr_send_loop
+
+ move.b #0,(0xa1000b).l
+ bra return_to_main
+
+transfer_recv:
+ move.b #0,(a1) /* clear TH */
+
+tr_recv_loop:
+wait_tl_low2:
+ move.b (a1),d0
+ btst.b #4,d0
+ bne wait_tl_low2
+
+ move.b #0x40,(a1) /* set TH */
+ move.b d0,d1
+ and.b #0x0f,d1
+
+wait_tl_hi2:
+ move.b (a1),d0
+ btst.b #4,d0
+ beq wait_tl_hi2
+
+ move.b #0,(a1) /* clear TH */
+ lsl.b #4,d0
+ or.b d0,d1
+ move.b d1,(a0)+
+
+ subq.l #1,d2
+ bne tr_recv_loop
+
+ move.b #0,(0xa1000b).l
+ bra return_to_main
+
# go back to main mode
return_to_main:
write_vdp_reg 5,(0xfc00 >> 9) /* Sprite address */
write_vdp_reg 6,0
write_vdp_reg 7,0 /* Backdrop color */
- write_vdp_reg 10,1 /* Lines per hblank interrupt */
- write_vdp_reg 11,0 /* 2-cell vertical scrolling */
- write_vdp_reg 12,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320)
- write_vdp_reg 13,(0x8000 >> 10) /* Horizontal scroll address */
- write_vdp_reg 15,2
- write_vdp_reg 16,(VDP16_MAP_V32 | VDP16_MAP_H64) /* layer size */
- write_vdp_reg 17,0
- write_vdp_reg 18,0xff
+ write_vdp_reg 0x0a,1 /* Lines per hblank interrupt */
+ write_vdp_reg 0x0b,0 /* 2-cell vertical scrolling */
+ write_vdp_reg 0x0c,(VDP12_SCREEN_V224 | VDP12_SCREEN_H320)
+ write_vdp_reg 0x0d,(0x8000 >> 10) /* Horizontal scroll address */
+ write_vdp_reg 0x0e,0
+ write_vdp_reg 0x0f,2
+ write_vdp_reg 0x10,(VDP16_MAP_V32 | VDP16_MAP_H64) /* layer size */
+ write_vdp_reg 0x11,0
+ write_vdp_reg 0x12,0
rts
notaz.gp2x.de / megadrive.git / commitdiff