and #%11110000
cmp #$10
beq geos10
+ cmp #$13 ; either 1.3 or 1.5
+ beq geos13check
lda gatewayFlag
cmp #$41
beq gateway
beq geos_on_plus4
ora version
rts
+geos13:
geos10:
lda version
rts
lda #$03
ora c128Flag
rts
+geos13check:
+ lda mp3Flag
+ cmp #$03
+ bne geos13
+geos15:
+ lda #$15
+ rts
_get_tv:
jsr _get_ostype