uzix/pacemuzx
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Added loading message

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Moved screen clear to just before ROM boot, so a loading message can show the program name and version number.
This commit is contained in:
Simon Owen
2012-01-08 01:27:04 +00:00
parent c3e6fff09f
commit 39ec3604b8
1 changed files with 41 additions and 48 deletions
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89
pacemuzx.asm
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@ -97,6 +97,9 @@ dip_5080: defb %11001001 ; -dbbllcc d=hard/normal bb=bonus life
start2: di
ld hl,loading_msg
call print_msg
ld a,(&5b5c) ; sysvar holding 128K paging
ex af,af' ; keep safe
ld a,%00000001 ; special paging, banks 0/1/2/3
@ -116,9 +119,6 @@ start2: di
; Next, move any data from load position to final location
start3: ld sp,new_stack
xor a
out (border),a ; black border
ld hl,&0000
ld de,&e000
ld bc,&2000
@ -180,54 +180,10 @@ no_specnet:
ld bc,&0720
ldir ; copy unshifted sprite data
; Clear both screens and set the default attribute colour
ld b,2 ; 2 screens to prepare
scrinit_lp: push bc
ld hl,&4000
ld de,&4001
ld bc,&1800
ld a,h
or ixh
ld h,a
ld d,a
ld (hl),l ; clear display data
ldir
ld bc,&0300 ; &300 bytes to fill
ld a,(attr_colour)
ld (hl),a ; fill display attrs
ldir
ld bc,spr_save_end-spr_save_2
ld (hl),l ; clear sprite restore data
ldir
IF !colour
ld hl,&5800+(10*32)+4 ; left column of tunnel trim
ld a,h
or ixh
ld h,a
ld bc,23 ; right column to left on next row
ld de,32-24 ; left column to right column
ld a,5 ; 5 blocks per column
attr_lp: ld (hl),b ; hide left column (6 pixels needed)
add hl,bc
ld (hl),b ; hide right column 0
inc l
ld (hl),b ; hide right column 1 (2 pixels needed)
add hl,de
dec a
jr nz,attr_lp
ENDIF
call do_flip ; switch to other display
pop bc
djnz scrinit_lp ; finish both screens
call make_tables ; create all the look-up tables and pre-shift sprites
call page_rom ; page in sound table and ROM
call sound_init ; enable sound chip
call init_screens ; prepare both screens and sprite save areas
ld hl,&5000 ; Pac-Man I/O area
xor a
@ -2580,6 +2536,40 @@ chk_specnet: ld hl,&3ff9 ; PAGEIN
jp &007c ; exit via RET in Speccy ROM to page out
; Clear both screens and sprite save areas, and set default attrs
init_screens: call page_screen
ld b,2 ; 2 screens to prepare
scrinit_lp: push bc
ld hl,&4000 ; Speccy display
ld de,&4001
ld bc,&1800 ; display length
ld a,h
or ixh ; adjust for current screen
ld h,a
ld d,a
ld (hl),l ; clear display data
ldir
ld bc,&0300 ; &300 bytes to fill
ld a,(attr_colour)
ld (hl),a ; fill display attrs
ldir
ld bc,spr_save_end-spr_save_2
ld (hl),l ; clear sprite restore data
ldir
call do_flip ; switch to other display
pop bc
djnz scrinit_lp ; finish both screens
jp page_rom
; Display a message using the ROM routines
; String in HL (null-terminated), paging expected to be correct
;
@ -2597,6 +2587,9 @@ msg_lp: ld a,(hl)
jr msg_lp
loading_msg: defm "pacemuzx v1.3"
defb 0
specnet_msg: defm "Disable Spectranet traps now..."
defb 0