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Alleyway/ROM map: Difference between revisions
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(Created page with ''''Addresses:''' * <tt>0x03B5-03C0</tt> = OAM DMA Transfer subroutine * <tt>0x03C1-03FE</tt> = Joypad subroutine * <tt>0x1C42-????</tt> = Level data <pre> 0x1C42-1D08: First leve…') |
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* <tt>0x03B5-03C0</tt> = OAM DMA Transfer subroutine | * <tt>0x03B5-03C0</tt> = OAM DMA Transfer subroutine | ||
* <tt>0x03C1-03FE</tt> = Joypad subroutine | * <tt>0x03C1-03FE</tt> = Joypad subroutine | ||
* <tt>0x07E8-07F1</tt> = Decrease lives | |||
<pre> | |||
00:07E8 FA 44 CA ld a,[$CA44] (Put in A the value in address $CA44=Lives) | |||
00:07EB FE 00 cp a,$00 (Compare the value of A with $00) | |||
00:07ED C8 ret z (Return if is zero) | |||
00:07EE 3D dec a (Decrease a) | |||
00:07EF EA 44 CA ld [$CA44],a (Sets the value of A in the address $CA44=Lives) | |||
</pre> | |||
* <tt>0x1C42-????</tt> = Level data | * <tt>0x1C42-????</tt> = Level data | ||
<pre> | <pre> | ||
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02: Two bricks. One in the position and other above it. | 02: Two bricks. One in the position and other above it. | ||
.... | .... | ||
FF: End of level data | |||
</pre> | </pre> | ||
Revision as of 16:01, 19 November 2010
Addresses:
- 0x03B5-03C0 = OAM DMA Transfer subroutine
- 0x03C1-03FE = Joypad subroutine
- 0x07E8-07F1 = Decrease lives
00:07E8 FA 44 CA ld a,[$CA44] (Put in A the value in address $CA44=Lives) 00:07EB FE 00 cp a,$00 (Compare the value of A with $00) 00:07ED C8 ret z (Return if is zero) 00:07EE 3D dec a (Decrease a) 00:07EF EA 44 CA ld [$CA44],a (Sets the value of A in the address $CA44=Lives)
- 0x1C42-???? = Level data
0x1C42-1D08: First levels 0x1D09-1DCD: Other levels Notes (Bricks values): 00: Without brick 01: One brick 02: Two bricks. One in the position and other above it. .... FF: End of level data