Apple-2-HW/AppleIISd
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Updated to V1.1

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This commit is contained in:
Florian Reitz 2017-12-17 20:21:30 +01:00
parent 4be091a1cb
commit f656800697
2 changed files with 47 additions and 13 deletions
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52
src/AppleIISd.s
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@ -1,7 +1,8 @@
;*******************************
;
; Apple][Sd Firmware
; Version 1.0
; Version 1.1
; Main source
;
; (c) Florian Reitz, 2017
;
@ -138,6 +139,8 @@
;*******************************
.else
;@BOOT: CMP #0
; BNE @NEXTSLOT ; init not successful
@BOOT: LDA #$01
STA DCMD ; load command
LDX SLOT16
@ -264,7 +267,17 @@ DRIVER: CLD
RTS
; Signature bytes
;*******************************
;
; Signature bytes
;
; 65535 blocks
; Removable media
; Non-interruptable
; 2 drives
; Read, write and status allowed
;
;*******************************
.segment "SLOTID"
.dbyt $FFFF ; 65535 blocks
@ -317,18 +330,22 @@ INIT: LDA #$03 ; set SPI mode 3
LDA #>CMD8
STA CMDHI
JSR SDCMD
JSR GETR3
JSR GETR3 ; R7 is also 1+4 bytes
CMP #$01
BNE @SDV1 ; may be SD Ver. 1
; check for $01aa match!
LDY SLOT ; check for $aa in R33
LDA R33,Y
CMP #$AA
BNE @ERROR1 ; error!
@SDV2: LDA #<CMD55
STA CMDLO
LDA #>CMD55
STA CMDHI
JSR SDCMD
JSR GETR1
LDA #<ACMD4140
LDA #<ACMD4140 ; enable SDHC support
STA CMDLO
LDA #>ACMD4140
STA CMDHI
@ -338,12 +355,25 @@ INIT: LDA #$03 ; set SPI mode 3
BEQ @SDV2 ; wait for ready
CMP #0
BNE @ERROR1 ; error!
; send CMD58
; SD Ver. 2 initialized!
LDA SS,X
LDA #<CMD58 ; check for SDHC
STA CMDLO
LDA #>CMD58
STA CMDHI
JSR SDCMD
JSR GETR3
CMP #0
BNE @ERROR1 ; error!
LDY SLOT
LDA R30,Y
AND #$40 ; check CCS
BEQ @BLOCKSZ
LDA SS,X ; card is SDHC
ORA #SDHC
STA SS,X
JMP @BLOCKSZ
JMP @END
@ERROR1: JMP @IOERROR ; needed for far jump
@ -661,7 +691,7 @@ TEST: LDA SLOT16
.endif
TEXT: .asciiz " Apple][Sd v1.0 (c)2017 Florian Reitz"
TEXT: .asciiz " Apple][Sd v1.1 (c)2017 Florian Reitz"
CMD0: .byt $40, $00, $00
.byt $00, $00, $95
@ -672,7 +702,9 @@ CMD8: .byt $48, $00, $00
CMD16: .byt $50, $00, $00
.byt $02, $00, $FF
CMD55: .byt $77, $00, $00
.byt $00, $00, $65
.byt $00, $00, $FF
CMD58: .byt $7A, $00, $00
.byt $00, $00, $FF
ACMD4140: .byt $69, $40, $00
.byt $00, $00, $77
ACMD410: .byt $69, $00, $00

8
src/Helper.s
View File

@ -1,7 +1,8 @@
;*******************************
;
; Apple][Sd Firmware
; Version 1.0
; Version 1.1
; Helper functions
;
; (c) Florian Reitz, 2017
;
@ -64,7 +65,7 @@ GETR1: LDA #DUMMY
;*******************************
;
; Get R3
; Get R3 or R7
; R1 is in A
; R3 is in scratchpad ram
;
@ -74,6 +75,7 @@ GETR3: JSR GETR1 ; get R1 first
PHA ; save R1
PHY ; save Y
LDY #04 ; load counter
JMP @WAIT ; first byte is already there
@LOOP: LDA #DUMMY ; send dummy
STA DATA,X
@WAIT: BIT CTRL,X
@ -90,7 +92,7 @@ GETR3: JSR GETR1 ; get R1 first
PLA
STA R31,Y
PLA
STA R30,Y
STA R30,Y ; R30 is MSB
PLY ; restore Y
LDA #DUMMY
STA DATA,X ; send another dummy