Blaster Master/RAM map

The following article is a RAM map for Blaster Master.

Note: Memory locations discovered using the 'FCEU' Emulator for Windows.

Offset	Effect	Comments
0x0014	Current Area	Current area * 8 (area 1 = $08, area 2 = $10, etc.)
0x0092	Hover Gauge value	Bar Graph. value increases 32 per bar (max 255)
0x0099	Special Items	See bit field table below.
0x00DD	Lives Remaining
0x00C3	"GUN" Gauge	Bar graph. value increases 32 per bar (max 255)
0x00F5	PAD1 new input	Input new to current frame
0x00F6	PAD2 new input	Input new to current frame
0x00F7	PAD1 current input
0x00F8	PAD2 current input
0x03FB	Bosses Defeated	See bit field table below.
0x03FC	Item Pickups	See bit field table below.
0x03FF	Saved tank health	Tank health when outside tank. (max 255)
0x040D	Main Health Gauge	Bar graph. Value increases 32 per bar (max 255)
0x0500-5FF	Level Data	Each byte represents one square tile
0x06F0	Homing Missiles	Quantity (00 - 99)
0x06F1	Lightening Blast	Quantity (00 - 99)
0x06F2	3-way Missile	Quantity (00 - 99)

Bit field table for offset 0x0099			Bit field table for offset 0x03FB			Bit field table for offset 0x03FC
Bit	Decimal	Effect	Bit	Decimal	Effect	Bit	Decimal	Effect
1	1	Gives 'Hover' ability	1	1	Stage 1 Boss defeated	1	1	Stage 1 Item Obtained
2	2	Gives 'Dive' ability	2	2	Stage 2 Boss defeated	2	2	Stage 2 Item Obtained
3	4	Gives 'Wall.1' ability	3	4	Stage 3 Boss Defeated	3	4	Stage 3 Item Obtained
4	8	Gives 'Wall.2' ability	4	8	Stage 4 Boss Defeated	4	8	Stage 4 Item Obtained
5	16	Gives 'Crusher' ability	5	16	Stage 5 Boss Defeated	5	16	Stage 5 Item Obtained
6	32	No effect	6	32	Stage 6 Boss Defeated	6	32	Stage 6 Item Obtained
7	64	Gives 'Hyper' ability	7	64	Stage 7 Boss Defeated	7	64	Stage 7 Item Obtained
8	128	Gives 'Key' ability	8	128	Stage 8 Boss Defeated	8	128	No Effect

Example: To get Hover, Wall.1, and Wall.2, add the decimal values that correspond to the table entries. In this case, 1, 4, and 8. Setting offset 0x0099 to decimal 13 will give you those skills, since 1+4+8 = 13.

Note: Setting bit 8 in offset 0x03FB will take you straight to the final boss (guy with whip) without having to defeat the 2-legged spit shooter first.

(Source: Locations mapped by Aeryck (mailto:sk4ven@netscape.net))