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SD Card Driver Compatibility Improvement

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Handle SD Cards that do not support ACMD41 by using CMD1 instead.
This commit is contained in:
Wayne Warthen
2021-01-09 10:39:29 -08:00
parent e72886cfaf
commit 49de66fb85
2 changed files with 10 additions and 1 deletions
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2
Source/HBIOS/Makefile
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@@ -3,7 +3,7 @@ ifndef ROM_CONFIG
endif
ifdef ROM_PLATFORM
OBJECTS = ${ROM_PLATFORM}_${ROM_CONFIG}.rom ${ROM_PLATFORM}_${ROM_CONFIG}.com
OBJECTS = ${ROM_PLATFORM}_${ROM_CONFIG}.rom ${ROM_PLATFORM}_${ROM_CONFIG}.com ${ROM_PLATFORM}_${ROM_CONFIG}.upd
else
OBJECTS += DYNO_std.rom DYNO_std.com DYNO_std.upd
OBJECTS += EZZ80_std.rom EZZ80_std.com EZZ80_std.upd

9
Source/HBIOS/sd.asm
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@@ -946,7 +946,16 @@ SD_INITCARD3:
LD A,$40 ; P0 = $40 INDICATES WE SUPPORT V2 CARDS
LD (SD_CMDP0),A ; SET COMMAND PARM 0
CALL SD_EXECCMDND ; EXEC COMMAND W/ NO DATA RETURNED
;RET NZ ; ABORT ON ERROR
JR Z,SD_INITCARD3AA ; IF GOOD SKIP AHEAD
; SOME CARDS DON'T SUPPORT ACMD41, SO TRY CMD1 AS ALTERNATIVE
LD A,SD_CMD_SEND_OP_COND ; SD_CMD_SEND_OP_COND
CALL SD_INITCMD ; SETUP COMMAND BUFFER
LD A,$40 ; P0 = $40 INDICATES WE SUPPORT V2 CARDS
LD (SD_CMDP0),A ; SET COMMAND PARM 0
CALL SD_EXECCMDND ; EXEC COMMAND W/ NO DATA RETURNED
RET NZ ; ABORT ON ERROR
SD_INITCARD3AA:
; CHECK FOR IDLE, EXIT LOOP IF IDLE CLEARED
LD A,(SD_RC) ; GET CARD RESULT CODE
OR A ; SET FLAGS