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adapted to new return values (PAL/NTSC is now reported with another

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function)


git-svn-id: svn://svn.cc65.org/cc65/trunk@547 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cpg 2000-12-04 20:22:23 +00:00
parent 49503665f4
commit d678c41294
1 changed files with 20 additions and 49 deletions
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69
libsrc/atari/ostype.s
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@ -1,15 +1,14 @@
;
; Christian Groessler, July 2000
; Christian Groessler, December 2000
; from Freddy Offenga's rominfo.c
;
; unsigned int get_ostype(void)
; unsigned char get_ostype(void)
;
; x x x x x x x x x x x x x x x x - 16 bit flag
; | | | | | | | | | | | | | | | |
; | | | | | | | | | | | | | +-+-+-- main OS rev.
; | | | | | | | | | | | +-+-------- PAL/NTSC flag
; | | | | | | | | +-+-+------------ minor OS rev.
; +-+-+-+-+-+-+-+------------------- unused
; x x x x x x x x - 8 bit flag
; | | | | | | | |
; | | | | | +-+-+-- main OS rev.
; | | +-+-+-------- minor OS rev.
; +-+-------------- unused
;
; main OS rev.:
; 000 - unknown
@ -17,17 +16,14 @@
; 010 - 1200XL ROM
; 011 - XL/XE ROM
; 1xx - unassigned
; PAL/NTSC flag:
; 00 - unknown
; 01 - PAL
; 10 - NTSC
; 11 - (invalid)
; minor OS rev.: (depending on main OS rev.);
; 400/800:
; 000 - unknown
; 001 - Rev. A
; 010 - Rev. B
; 011 - unassigned (up to 111)
; 001 - Rev. A PAL
; 010 - Rev. B PAL
; 011 - Rev. A NTSC
; 100 - Rev. B NTSC
; 101 - unassigned (up to 111)
; 1200XL:
; 000 - unknown
; 001 - Rev. 10
@ -42,10 +38,7 @@
; 101 - unassigned (up to 111)
;
.include "atari.inc"
.export _get_ostype
.importzp tmp1
.proc _get_ostype
@ -67,30 +60,8 @@
asl a
asl a
asl a
asl a
asl a
and #%11100000
and #%00111000
ora #%11
_fin_xl:sta tmp1
lda PALNTS ; get OS PAL/NTSC flag (0 = NTSC, 1 = PAL)
beq _xl_ntsc
cmp #1
beq _xl_pal
lda #0
beq _fxlcont
_xl_ntsc:
lda #%10
bne _fxlcont
_xl_pal:lda #1
_fxlcont:
asl a
asl a
asl a
ora tmp1
_fin: ldx #0
rts
@ -113,15 +84,15 @@ _1200xl:
beq _1200_fin
_1200_10:
lda #%00100000
lda #%00001000
bne _1200_fin
_1200_11:
lda #%01000000
lda #%00010000
_1200_fin:
ora #%010
bne _fin_xl
bne _fin
; 400/800 ROM
@ -135,7 +106,7 @@ _400800:
; 400/800 NTSC Rev. A
lda #%00110001
lda #%00011001
bne _400800_done
; 400/800 unknown
@ -152,7 +123,7 @@ _400800_1:
; 400/800 PAL Rev. A
lda #%00101001
lda #%00001001
bne _400800_done
_400800_2:
@ -163,7 +134,7 @@ _400800_2:
; 400/800 NTSC Rev. B
lda #%01010001
lda #%00100001
bne _400800_done
_400800_3:
@ -175,7 +146,7 @@ _400800_3:
; 400/800 PAL Rev. B
lda #%01001001
lda #%00010001
_400800_done:
bne _fin