diff options
| author | John Wilbert M. Villamor <lameguy64@gmail.com> | 2020-01-06 09:39:20 +0800 |
|---|---|---|
| committer | John Wilbert M. Villamor <lameguy64@gmail.com> | 2020-01-06 09:39:20 +0800 |
| commit | c98ad0e7dbc48c928aaea0f78214c7ed6556417d (patch) | |
| tree | bcbafb8547eceb867f342bfe504377e13a5533a9 /libpsn00b/libpsxcd/_cd_control.s | |
| parent | 87ded2ccb9db9bf3b2ed40a0b02b663179d5868f (diff) | |
| download | psn00bsdk-c98ad0e7dbc48c928aaea0f78214c7ed6556417d.tar.gz | |
Some minor updates, added CD-ROM library documentation
Diffstat (limited to 'libpsn00b/libpsxcd/_cd_control.s')
| -rw-r--r-- | libpsn00b/libpsxcd/_cd_control.s | 109 |
1 files changed, 0 insertions, 109 deletions
diff --git a/libpsn00b/libpsxcd/_cd_control.s b/libpsn00b/libpsxcd/_cd_control.s deleted file mode 100644 index 7f69266..0000000 --- a/libpsn00b/libpsxcd/_cd_control.s +++ /dev/null @@ -1,109 +0,0 @@ -.set noreorder - -.include "hwregs_a.h" - -.section .text - -# -# Issues command and parameter bytes to CD controller directly -# -.global _cd_control -.type _cd_control, @function -_cd_control: - - # a0 - command value - # a1 - pointer to parameters - # a2 - length of parameters - - li $v0, 1 # Set acknowledge wait flag - la $v1, _cd_ack_wait - sb $v0, 0($v1) - - # Commands that have a 'completion' interrupt (CDIRQ2) - - beq $a0, 0x07, .Lset_complete # CdlStandby - nop - beq $a0, 0x08, .Lset_complete # CdlStop - nop - beq $a0, 0x09, .Lset_complete # CdlPause - nop - beq $a0, 0x0A, .Lset_complete # CdlInit - nop - beq $a0, 0x12, .Lset_complete # CdlSetsession - nop - beq $a0, 0x15, .Lset_complete # CdlSeekL - nop - beq $a0, 0x16, .Lset_complete # CdlSeekP - nop - beq $a0, 0x1A, .Lset_complete # GetID - nop - beq $a0, 0x1D, .Lset_complete # GetQ - nop - - la $v1, _cd_complt_wait # Set wait complete flag - sb $0 , 0($v1) - - b .Lno_complete - nop - -.Lset_complete: - - la $v1, _cd_complt_wait # Set wait complete flag - sb $v0, 0($v1) - -.Lno_complete: - - bne $a0, 0x0E, .Lnot_mode - lbu $v0, 0($a1) - la $v1, _cd_last_mode - sb $v0, 0($v1) - -.Lnot_mode: - - la $v1, _cd_last_int # Clear last IRQ value - sb $0 , 0($v1) - - la $v1, _cd_last_cmd # Save command as last command - sb $a0, 0($v1) - - lui $v1, IOBASE - -.Lbusy_wait: - lbu $v0, CD_REG0($v1) - nop - andi $v0, 0x80 - bnez $v0, .Lbusy_wait - nop - - li $v0, 1 # Clear parameter FIFO (in case it wasn't cleared) - sb $v0, CD_REG0($v1) - li $v0, 0x40 - sb $v0, CD_REG3($v1) - -.Lcmd_wait: # Wait for CD to become ready for commands - lbu $v0, CD_REG0($v1) - nop - andi $v0, 0x80 - bnez $v0, .Lcmd_wait - nop - - sb $0 , CD_REG0($v1) - - beqz $a2, .Lno_params - nop - -.Lfeed_params: # Feed parameters to parameter FIFO - lbu $v0, 0($a1) - addi $a2, -1 - sb $v0, CD_REG2($v1) - bgtz $a2, .Lfeed_params - addiu $a1, 1 - -.Lno_params: - - sb $0 , CD_REG0($v1) # Feed command value - sb $a0, CD_REG1($v1) - - jr $ra - nop -
\ No newline at end of file |