General info for: Last Sunset for Lattica [#ID: 2830]
Title:
Release Date:
1983
Original Publisher:
Creators:
Authored with:
Availability:
Available
Message Language:
English
Machine Type:
ZX-Spectrum 48K
Genre:
Maximum Players:
1
Controls:
Original Price:
£5.50
Known Errors:
Bugfix provided by Battle Bunny (JimG):
Modified "BUGFIX" file provided by Einar Saukas.
- There are some adjacent screens where the exit positions don't properly match, so it's possible to move into a wall on the next screen. When it happens, the player bounces off the wall and usually goes back to the previous location. However, there are a few cases where the game doesn't calculate the returning position properly, so the player is bounced around a few times and may arrive at an entirely different location, sometimes outside the map. This problem happens because the game uses a complicated formula for calculating connections between map segments based upon which keys had been pressed, which doesn't work properly if the player moved in diagonal. The correction ignores this calculation and instead saves the current and previous segment addresses, as bouncing back off a wall should always go back to where it just came from regardless of which keys were pressed. Fixed using the following patch:
org $9D3F
call PSAVE ; 9D3F CD 34 F8
org $A2BA
call PLOAD ; A2BA CD 53 F8
org $A30A
call PLOAD ; A30A CD 53 F8
org $B318
call PSAVE ; B318 CD 34 F8
org $B353
call PSAVE ; B353 CD 34 F8
org $F834
PSAVE: PUSH HL ; F834 E5
LD HL, ($D1A5) ; F835 2A A5 D1
LD (ROWNUM), HL ; F838 22 88 F8
LD HL, ($D1A9) ; F83B 2A A9 D1
LD (COLNUM), HL ; F83E 22 8A F8
LD HL, (THISAD) ; F841 2A 83 F8
LD (PREVAD), HL ; F844 22 85 F8
POP HL ; F847 E1
LD ($D1A1), HL ; F848 22 A1 D1
LD (THISAD), HL ; F84B 22 83 F8
XOR A ; F84E AF
LD (FLAGAD), A ; F84F 32 87 F8
RET ; F852 C9
PLOAD: LD A, (FLAGAD) ; F853 3A 87 F8
AND A ; F856 A7
JR NZ, NOSWAP ; F857 20 17
LD HL, (PREVAD) ; F859 2A 85 F8
LD ($D1A1), HL ; F85C 22 A1 D1
PUSH HL ; F85F E5
LD HL, (THISAD) ; F860 2A 83 F8
LD (PREVAD), HL ; F863 22 85 F8
POP HL ; F866 E1
LD (THISAD), HL ; F867 22 83 F8
INC A ; F86A 3C
LD (FLAGAD), A ; F86B 32 87 F8
JR ROWCOL ; F86E 18 06
NOSWAP: LD HL, (THISAD) ; F870 2A 83 F8
LD ($D1A1), HL ; F873 22 A1 D1
ROWCOL: LD HL, (ROWNUM) ; F876 2A 88 F8
LD ($D1A5), HL ; F879 22 A5 D1
LD HL, (COLNUM) ; F87C 2A 8A F8
LD ($D1A9), HL ; F87F 22 A9 D1
RET ; F882 C9
THISAD: defw $0000 ; F883 00 00
PREVAD: defw $0000 ; F885 00 00
FLAGAD: defb $00 ; F887 00
ROWNUM: defw $0000 ; F888 00 00
COLNUM: defw $0000 ; F88A 00 00
Modified "BUGFIX" file provided by Einar Saukas.
User Score
Main File Downloads
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TAP
JSSpeccy
Icons provided by Flaticon
RZX Archive
Speccy Screenshot Maps
Releases
Compilations featuring this title
Title: Load 'n' Run issue 09
Date: 1984/Oct
Release Type: Unauthorized version
Alternate Title: Panico in città
Additional File Downloads
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Article Type: Review
Article Type: Review
Article Type: Advert
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