git-svn-id: svn://cu.loc/avr-cpm/branches/fat16-test@132 57430480-672e-4586-8877...

[avrcpm.git] / dsk_mgr.asm

diff --git a/dsk_mgr.asm b/dsk_mgr.asm
index 38901cd6fa7d7118da2c0cf4c0029ca8ce43a84e..e48052c28f94c08b658c90811d4227869c6de405 100644 (file)
--- a/dsk_mgr.asm
+++ b/dsk_mgr.asm
@@ -22,13 +22,16 @@
 ;\r
 \r
 \r
-; ------------------------- Defines for the disk management Structures\r
+;-------------------------- Defines for the disk management Structures\r
 \r
 ;----------------------------------------------- Start of Data Segment\r
 \r
        .dseg\r
 \r
 \r
+; Partition table offsets:\r
+tmp_tbl:\r
+       .byte   PARTENTRY_SIZE*MAXDISKS\r
 \r
 ; ------------------------------- Start of Code Segment\r
        .cseg\r
@@ -38,10 +41,10 @@
 ; ====================================================================\r
 ; Parameters\r
 ; --------------------------------------------------------------------\r
-; Registers  : none\r
-; Variables  : [w] temp                Status of Operation\r
-;                                                      (0x80 - Operation Failure )\r
-;                                                      (others - Operation Suceded)\r
+; \r
+; Registers  : [w] temp            Number of disk images (raw and fat16) found.\r
+;                          + 0x80 if sd card changes. (not used, doesn't work)\r
+; SREG :          Z        according to temp\r
 ; --------------------------------------------------------------------\r
 ; Description:\r
 ; This Function scans an SD-Cards Boot-Sector for valid Partitions.\r
@@ -147,14 +150,21 @@ mgr_ploop2:
 ;      Get Partitiontype\r
        ldd             temp,z+PART_TYPE\r
 \r
-;   Test for FAT Partition\r
-       cpi             temp,PARTID_FAT16\r
+;   Test for FAT Partition Type 1\r
+       cpi     temp,PARTID1_FAT16\r
+       brne    mgr_nextp1\r
+       \r
+       rcall   fat_add_partition\r
+       rjmp    mgr_pend\r
+\r
+;   Test for FAT Partition Type 2\r
+mgr_nextp1:\r
+       cpi     temp,PARTID2_FAT16\r
        brne    mgr_nextp2\r
        \r
-       rcall    fat_add_partition\r
+       rcall   fat_add_partition\r
+       rjmp    mgr_pend        \r
 \r
-       rjmp    mgr_pend\r
-               \r
 mgr_nextp2:\r
        adiw    zl,16\r
        cpi             zl,low(hostbuf+510)\r
@@ -164,8 +174,15 @@ mgr_nextp2:
 \r
 mgr_pend:\r
 \r
+#if 0          /* ToDo: ramdisks are not in sd-card partitions */\r
 ; Initialize RAM-Disks\r
        rcall   rdsk_add_partition\r
+#endif\r
+\r
+;      Save ammount of found CP/M Partitions\r
+       sts     ndisks,temp3\r
+       tst     temp3\r
+       breq    mgr_fat\r
 \r
 ;Store new partitions and check if the SD card has been changed.\r
 \r
@@ -175,32 +192,37 @@ mgr_pend:
        clt\r
 \r
 mgr_pcpl:\r
-       ld              temp,y+\r
-       ld              temp2,z\r
-       st              z+,temp\r
+       ld      temp,y+\r
+       ld      temp2,z\r
+       st      z+,temp\r
        cpse    temp,temp2\r
        set\r
-       dec             temp4\r
+       dec     temp4\r
        brne    mgr_pcpl\r
 \r
-       mov             temp,temp3\r
-       sts             ndisks,temp\r
+       mov     temp,temp3\r
+       sts     ndisks,temp\r
+\r
        brtc    mgr_pcpe\r
 \r
-       tst             temp\r
-       breq    mgr_pcpe\r
+;      SD card changed.\r
 \r
-;      SD card not changed.\r
+       tst     temp\r
+       breq    mgr_pcpe\r
 \r
+mgr_fat:\r
 #if FAT16_SUPPORT\r
        rcall fat_scan_partition\r
-       rcall fat_reset_cache
+       rcall fat_reset_cache\r
 #endif\r
+\r
        lds             temp,ndisks\r
        sbr             temp,0x80\r
 \r
 mgr_pcpe:\r
 \r
+\r
+       tst     temp\r
        ret\r
 \r
 \r
@@ -221,19 +243,19 @@ mgr_prnt_parttbl:
        lds             yl,ndisks\r
        ldi             xh,'A'\r
 \r
-pprl:
-       ldd             temp ,z+1               ;Get partition start
-       ldd             temp2,z+2
-       ldd             temp3,z+3
-       ldd             temp4,z+4
+pprl:\r
+       ldd             temp ,z+1               ;Get partition start\r
+       ldd             temp2,z+2\r
+       ldd             temp3,z+3\r
+       ldd             temp4,z+4\r
 \r
        printnewline\r
 \r
-       cp              temp,_0                 ;If zero ...
-       cpc             temp2,_0
-       cpc             temp3,_0
-       cpc             temp4,_0
-       breq    mgr_prnop               ;... no partition table at 0
+       cp              temp,_0                 ;If zero ...\r
+       cpc             temp2,_0\r
+       cpc             temp3,_0\r
+       cpc             temp4,_0\r
+       breq    mgr_prnop               ;... no partition table at 0\r
 \r
 ; Partitiontype examining\r
        ldd     xl,z+0\r
@@ -268,7 +290,7 @@ mgr_prnop:
        rcall   mgr_prnt_image\r
 \r
 mgr_prnt_size:\r
-       call    print_ultoa
+       call    print_ultoa\r
        printstring ", size: "\r
 \r
        ldd             temp ,z+5                       ;Get partition size\r
@@ -280,15 +302,15 @@ mgr_prnt_size:
        ror             temp3\r
        ror             temp2\r
        ror             temp\r
-       call    print_ultoa
+       call    print_ultoa\r
        printstring "KB."\r
 \r
 mgr_goto_next_part:    \r
        adiw    z,PARTENTRY_SIZE\r
-       inc             xh
+       inc             xh\r
        dec             yl\r
        tst             yl\r
-       brne    pprl
+       brne    pprl\r
 \r
 mgr_pppre:\r
        ret\r
@@ -310,9 +332,9 @@ mgr_prnt_fatsize:
 \r
 mgr_prnt_diskname:\r
        push    temp\r
-       mov temp,xh
+       mov temp,xh\r
        call uartputc\r
-       ldi temp,':'
+       ldi temp,':'\r
        call uartputc\r
        pop             temp\r
        ret\r