adc #1
sta DUNIT ; unit number (d1,d2,d3,...)
- ldy #sst_sectsize
+ lda DAUX2 ; high byte sector #
+ bne _realsz
+ lda DAUX1
+ cmp #4 ; sectors 1 to 3 are special (always 128 bytes)
+ bcs _realsz
+
+ lda #$80
+ sta DBYTLO
+ asl a
+ sta DBYTHI
+ beq _cont
+
+_realsz:ldy #sst_sectsize
lda (ptr1),y
sta DBYTLO
iny
lda (ptr1),y
sta DBYTHI
- lda #DISKID ; SIO bus ID of diskette drive
+_cont: lda #DISKID ; SIO bus ID of diskette drive
sta DDEVIC
lda #15
sta DTIMLO ; value got from DOS source