hi;
you shall not be able to store -44.0593
but you can always store 44059 because it can be done by using DW directive.if you wish to have more precision then you may choose:
db 44
db 05
db 93
so three bytes cater for each entry.since you have got all decimals per byte value can not exceed 99.so by inserting a 255 in between you can account for decimal point also.
so:
db 44
db 255
db 05
db 93
shall take 4 bytes and shall mean 44.0593
this takes 4 bytes per entry.with signed display you can have 1 more byte to account for it.
so a 256 value shall take 256*5 bytes.

for accessing you can use multiply inst. and movc instr.

regards
pranav