Difference between revisions of "Get TIM"
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000447bc: 27bdffd8 addiu r29,r29,0xffd8 | 000447bc: 27bdffd8 addiu r29,r29,0xffd8 | ||
000447c0: afb3001c sw r19,0x001c(r29) | 000447c0: afb3001c sw r19,0x001c(r29) | ||
| − | 000447c4: 00809821 addu r19,r4,r0 | + | 000447c4: 00809821 addu r19,r4,r0 # LBA sector of data |
000447c8: afb00010 sw r16,0x0010(r29) | 000447c8: afb00010 sw r16,0x0010(r29) | ||
| − | 000447cc: 00a08021 addu r16,r5,r0 | + | 000447cc: 00a08021 addu r16,r5,r0 # file size in bytes |
| − | 000447d0: 02002021 addu r4,r16,r0 | + | 000447d0: 02002021 addu r4,r16,r0 # request this many bytes of RAM |
000447d4: afbf0020 sw r31,0x0020(r29) | 000447d4: afbf0020 sw r31,0x0020(r29) | ||
000447d8: afb20018 sw r18,0x0018(r29) | 000447d8: afb20018 sw r18,0x0018(r29) | ||
| − | 000447dc: 0c011105 jal 0x00044414 | + | 000447dc: 0c011105 jal 0x00044414 # [[C51 Malloc]] |
000447e0: afb10014 sw r17,0x0014(r29) | 000447e0: afb10014 sw r17,0x0014(r29) | ||
000447e4: 00409021 addu r18,r2,r0 | 000447e4: 00409021 addu r18,r2,r0 | ||
| − | 000447e8: 16400003 bne r18,r0,0x000447f8 | + | 000447e8: 16400003 bne r18,r0,0x000447f8 # skip error code if memory allocated |
000447ec: 00000000 nop | 000447ec: 00000000 nop | ||
| − | 000447f0: 0c011282 jal 0x00044a08 | + | 000447f0: 0c011282 jal 0x00044a08 # [[00044a08 - 00044a30]] error code 1 |
000447f4: 34040001 ori r4,r0,0x0001 | 000447f4: 34040001 ori r4,r0,0x0001 | ||
000447f8: 3c118005 lui r17,0x8005 | 000447f8: 3c118005 lui r17,0x8005 | ||
| − | 000447fc: 2631eaf4 addiu r17,r17,0xeaf4 | + | 000447fc: 2631eaf4 addiu r17,r17,0xeaf4 # file descriptor |
| − | 00044800: 02202021 addu r4,r17,r0 | + | 00044800: 02202021 addu r4,r17,r0 # file descriptor |
| − | 00044804: 02602821 addu r5,r19,r0 | + | 00044804: 02602821 addu r5,r19,r0 # LBA address |
| − | 00044808: 001032c2 srl r6,r16,0x0b | + | 00044808: 001032c2 srl r6,r16,0x0b # num sectors |
| − | 0004480c: 0c0046f4 jal 0x00011bd0 | + | 0004480c: 0c0046f4 jal 0x00011bd0 # [[Load Data From Disc (0x11bd0)]] |
| − | 00044810: 02403821 addu r7,r18,r0 | + | 00044810: 02403821 addu r7,r18,r0 # address to open file in RAM |
| − | 00044814: 10400009 beq r2,r0,0x0004483c | + | 00044814: 10400009 beq r2,r0,0x0004483c # branch if successful |
00044818: 00000000 nop | 00044818: 00000000 nop | ||
| − | 0004481c: 0c0076ea jal 0x0001dba8 | + | 0004481c: 0c0076ea jal 0x0001dba8 # [[Vsync call]] |
00044820: 00002021 addu r4,r0,r0 | 00044820: 00002021 addu r4,r0,r0 | ||
| − | 00044824: 0c01127b jal 0x000449ec | + | 00044824: 0c01127b jal 0x000449ec # jr r31 |
00044828: 00000000 nop | 00044828: 00000000 nop | ||
| − | 0004482c: 0c00478e jal 0x00011e38 | + | 0004482c: 0c00478e jal 0x00011e38 # [[00011e38 - 0001201c]] |
| − | 00044830: 02202021 addu r4,r17,r0 | + | 00044830: 02202021 addu r4,r17,r0 # file descriptor |
| − | 00044834: 08011201 j 0x00044804 | + | 00044834: 08011201 j 0x00044804 # loop, indefinitely? |
00044838: 02202021 addu r4,r17,r0 | 00044838: 02202021 addu r4,r17,r0 | ||
| + | |||
0004483c: 3c028005 lui r2,0x8005 | 0004483c: 3c028005 lui r2,0x8005 | ||
00044840: 8c42eaf8 lw r2,-0x1508(r2) | 00044840: 8c42eaf8 lw r2,-0x1508(r2) | ||
00044844: 00000000 nop | 00044844: 00000000 nop | ||
| − | 00044848: 1040000d beq r2,r0,0x00044880 | + | 00044848: 1040000d beq r2,r0,0x00044880 # branch if no file currently being opened |
0004484c: 02401021 addu r2,r18,r0 | 0004484c: 02401021 addu r2,r18,r0 | ||
00044850: 02208021 addu r16,r17,r0 | 00044850: 02208021 addu r16,r17,r0 | ||
| − | 00044854: 0c0076ea jal 0x0001dba8 | + | 00044854: 0c0076ea jal 0x0001dba8 # [[VSync call]] |
00044858: 00002021 addu r4,r0,r0 | 00044858: 00002021 addu r4,r0,r0 | ||
| − | 0004485c: 0c01127b jal 0x000449ec | + | 0004485c: 0c01127b jal 0x000449ec # [[000449ec - 000449f4]] jr r31 |
00044860: 00000000 nop | 00044860: 00000000 nop | ||
| − | 00044864: 0c00478e jal 0x00011e38 | + | 00044864: 0c00478e jal 0x00011e38 # [[00011e38 - 0001201c]] |
| − | 00044868: 02002021 addu r4,r16,r0 | + | 00044868: 02002021 addu r4,r16,r0 # file descriptor |
0004486c: 3c028005 lui r2,0x8005 | 0004486c: 3c028005 lui r2,0x8005 | ||
| − | 00044870: 8c42eaf8 lw r2,-0x1508(r2) # | + | 00044870: 8c42eaf8 lw r2,-0x1508(r2) # file still being opened check |
00044874: 00000000 nop | 00044874: 00000000 nop | ||
| − | 00044878: 1440fff6 bne r2,r0,0x00044854 | + | 00044878: 1440fff6 bne r2,r0,0x00044854 # branch if so |
| − | 0004487c: 02401021 addu r2,r18,r0 | + | 0004487c: 02401021 addu r2,r18,r0 # return location of opened and read file |
00044880: 8fbf0020 lw r31,0x0020(r29) | 00044880: 8fbf0020 lw r31,0x0020(r29) | ||
00044884: 8fb3001c lw r19,0x001c(r29) | 00044884: 8fb3001c lw r19,0x001c(r29) | ||
Latest revision as of 00:21, 11 June 2024
000447bc: 27bdffd8 addiu r29,r29,0xffd8 000447c0: afb3001c sw r19,0x001c(r29) 000447c4: 00809821 addu r19,r4,r0 # LBA sector of data 000447c8: afb00010 sw r16,0x0010(r29) 000447cc: 00a08021 addu r16,r5,r0 # file size in bytes 000447d0: 02002021 addu r4,r16,r0 # request this many bytes of RAM 000447d4: afbf0020 sw r31,0x0020(r29) 000447d8: afb20018 sw r18,0x0018(r29) 000447dc: 0c011105 jal 0x00044414 # C51 Malloc 000447e0: afb10014 sw r17,0x0014(r29) 000447e4: 00409021 addu r18,r2,r0 000447e8: 16400003 bne r18,r0,0x000447f8 # skip error code if memory allocated 000447ec: 00000000 nop 000447f0: 0c011282 jal 0x00044a08 # 00044a08 - 00044a30 error code 1 000447f4: 34040001 ori r4,r0,0x0001 000447f8: 3c118005 lui r17,0x8005 000447fc: 2631eaf4 addiu r17,r17,0xeaf4 # file descriptor 00044800: 02202021 addu r4,r17,r0 # file descriptor 00044804: 02602821 addu r5,r19,r0 # LBA address 00044808: 001032c2 srl r6,r16,0x0b # num sectors 0004480c: 0c0046f4 jal 0x00011bd0 # Load Data From Disc (0x11bd0) 00044810: 02403821 addu r7,r18,r0 # address to open file in RAM 00044814: 10400009 beq r2,r0,0x0004483c # branch if successful 00044818: 00000000 nop 0004481c: 0c0076ea jal 0x0001dba8 # Vsync call 00044820: 00002021 addu r4,r0,r0 00044824: 0c01127b jal 0x000449ec # jr r31 00044828: 00000000 nop 0004482c: 0c00478e jal 0x00011e38 # 00011e38 - 0001201c 00044830: 02202021 addu r4,r17,r0 # file descriptor 00044834: 08011201 j 0x00044804 # loop, indefinitely? 00044838: 02202021 addu r4,r17,r0
0004483c: 3c028005 lui r2,0x8005 00044840: 8c42eaf8 lw r2,-0x1508(r2) 00044844: 00000000 nop 00044848: 1040000d beq r2,r0,0x00044880 # branch if no file currently being opened 0004484c: 02401021 addu r2,r18,r0 00044850: 02208021 addu r16,r17,r0 00044854: 0c0076ea jal 0x0001dba8 # VSync call 00044858: 00002021 addu r4,r0,r0 0004485c: 0c01127b jal 0x000449ec # 000449ec - 000449f4 jr r31 00044860: 00000000 nop 00044864: 0c00478e jal 0x00011e38 # 00011e38 - 0001201c 00044868: 02002021 addu r4,r16,r0 # file descriptor 0004486c: 3c028005 lui r2,0x8005 00044870: 8c42eaf8 lw r2,-0x1508(r2) # file still being opened check 00044874: 00000000 nop 00044878: 1440fff6 bne r2,r0,0x00044854 # branch if so 0004487c: 02401021 addu r2,r18,r0 # return location of opened and read file 00044880: 8fbf0020 lw r31,0x0020(r29) 00044884: 8fb3001c lw r19,0x001c(r29) 00044888: 8fb20018 lw r18,0x0018(r29) 0004488c: 8fb10014 lw r17,0x0014(r29) 00044890: 8fb00010 lw r16,0x0010(r29) 00044894: 27bd0028 addiu r29,r29,0x0028 00044898: 03e00008 jr r31 0004489c: 00000000 nop
