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;
; Oliver Schmidt, 08.03.2004
;
; Identify DOS version we're running on as one of these:
;
; AppleDOS 3.3 - $00
; ProDOS 8 1.0.1 - $10
; ProDOS 8 1.0.2 - $10
; ProDOS 8 1.1.1 - $11
; ProDOS 8 1.2 - $12
; ProDOS 8 1.3 - $13
; ProDOS 8 1.4 - $14
; ProDOS 8 1.5 - $15
; ProDOS 8 1.6 - $16
; ProDOS 8 1.7 - $17
; ProDOS 8 1.8 - $18
; ProDOS 8 1.9 - $18 (!)
; ProDOS 8 2.0.1 - $21
; ProDOS 8 2.0.2 - $22
; ProDOS 8 2.0.3 - $23
; ProDOS 8 2.4.x - $24
;
.constructor initdostype, 25
.export __dos_type
.include "mli.inc"
; Identify DOS version according to:
; - Beneath Apple ProDOS, chapter 6-63
; - Apple II ProDOS 8 TechNote #23, ProDOS 8 Changes and Minutia
; - ProDOS TechRefMan, chapter 5.2.4
.segment "ONCE"
initdostype:
lda $BF00
cmp #$4C ; Is MLI present? (JMP opcode)
bne done
lda KVERSION ; ProDOS 8 kernel version
cmp #$10
bcs :+
ora #$10 ; Make high nibble match major version
: sta __dos_type
done: rts
.data
__dos_type: .byte $00
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