Synthesize sd card dma

2024-03-17 22:26:42 -07:00
parent 9b50dab855
commit 25f51deaa7
6 changed files with 148 additions and 108 deletions
--- a/sw/test_code/sd_controller_test/main.s
+++ b/sw/test_code/sd_controller_test/main.s
@@ -11,6 +11,9 @@ SD_ARG = SD_CONTROLLER + $4
 SD_RESP = SD_CONTROLLER + $10
 CLK_DIV = $20

+SD_DMA_BASE = SD_CONTROLLER + $28
+SD_DMA_STAT_CTRL = SD_CONTROLLER + $2C
+
 .zeropage
 rca: .res 4

@@ -107,6 +110,22 @@ card_ready:
        lda #17
        sta SD_CONTROLLER

+        lda #$10
+        sta SD_DMA_BASE + 1
+        lda #1
+        sta SD_DMA_STAT_CTRL
+
+@poll:  lda SD_DMA_STAT_CTRL+2
+        cmp #$1
+        bne @poll
+        stz SD_DMA_STAT_CTRL
+
+        lda $1000
+        lda $1001
+        lda $1002
+        lda $1003
+
+
@end:   bra @end

 delay: