Everyone's A Wally

Company: Mikrogen

Platform: ZX Spectrum

Exposed by: Luny

Fittings

BD86	Table of Pointers
WORD	Address to data string of each fitting

C352

Data String

BYTE...

Data String describing a fitting

BYTE(s)	Description
n<80	Draw tile(n) @ current position
n=FE, a	Change colour to match attribute(a)
A8<=n=>E8, y	Move cursor to position (n,y)
n=FB, hl	change address of the first tile to (hl)
n=F1	Move cursor right by one tile
n=F3, hl	Point to the address (hl) of another fitting data string
n=F0, b, a	Draw tile(a) down in a cloumn, (b) times
n=F2, b, a1, a2	Draw alternate tiles (a1, a2) in a row, (b) times
n=FD, b, a	Draw tile(a) across, (b) times
n=FF	End of data string

NOTES

Each fitting is made up of 8x8 tiles. The data string describes where these tiles should be placed.

When drawing a fitting a 'cursor' is used, the same way PRINT works in BASIC, which is updated to the next character cell when a tile is drawn. This cursor can be moved to any location on the screen

Updated 22/08/2004