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More SD Card Compatibility Changes

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Based on a logic analyzer trace from Andy Cooper, it appears that some SD cards want the unused CRC byte of the command packet to be 0xFF instead of the 0x00 filler I was using.  Changed to put 0xFF in the CRC byte when unused.
This commit is contained in:
Wayne Warthen
2021-01-10 10:18:30 -08:00
parent 430bbd2ccf
commit e4cdc3d167
3 changed files with 4 additions and 2 deletions
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2
Source/HBIOS/sd.asm
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@@ -1320,6 +1320,8 @@ SD_INITCMD1:
INC HL ; POINT TO NEXT BYTE
LD (HL),A ; CLEAR IT
DJNZ SD_INITCMD1 ; LOOP TILL DONE
DEC A ; $FF TO ACCUM
LD (SD_CMDCRC),A ; PUT $FF IN CRC POSITION
RET
;
; EXECUTE APP COMMAND

2
Source/ver.inc
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@@ -2,4 +2,4 @@
#DEFINE RMN 1
#DEFINE RUP 1
#DEFINE RTP 0
#DEFINE BIOSVER "3.1.1-pre.26"
#DEFINE BIOSVER "3.1.1-pre.27"

2
Source/ver.lib
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@@ -3,5 +3,5 @@ rmn equ 1
rup equ 1
rtp equ 0
biosver macro
db "3.1.1-pre.26"
db "3.1.1-pre.27"
endm