mirror of
https://github.com/freitz85/AppleIISd.git
synced 2024-05-28 03:48:26 +00:00
Helper and include files added
This commit is contained in:
Florian Reitz
parent
0b33b5d385
commit
4be091a1cb
BIN
AppleIISd.bin
BIN
AppleIISd.bin
Binary file not shown.
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@ -15,7 +15,9 @@
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<None Include="obj\AppleIISd.lst" />
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<None Include="README.md" />
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<None Include="src\AppleIISd.cfg" />
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<None Include="src\AppleIISd.inc" />
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<None Include="src\AppleIISd.s" />
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<None Include="src\Helper.s" />
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</ItemGroup>
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<PropertyGroup Label="Globals">
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<ProjectGuid>{9EA7EC3D-1771-420F-932F-231A35ED1200}</ProjectGuid>
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@ -10,6 +10,12 @@
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</None>
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<None Include="README.md" />
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<None Include="obj\AppleIISd.lst" />
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<None Include="src\Helper.s">
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<Filter>src</Filter>
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</None>
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<None Include="src\AppleIISd.inc">
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<Filter>src</Filter>
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</None>
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</ItemGroup>
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<ItemGroup>
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<Filter Include="src">
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44
src/AppleIISd.inc
Normal file
44
src/AppleIISd.inc
Normal file
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@ -0,0 +1,44 @@
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;*******************************
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;
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; Apple][Sd Firmware
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; Version 1.0
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;
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; (c) Florian Reitz, 2017
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;
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; X register usually contains SLOT16
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; Y register is used for counting or SLOT
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;
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;*******************************
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; Memory defines
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SLOT16 := $2B ; $s0 -> slot * 16
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SLOT := $3D ; $0s
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CMDLO := $40
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CMDHI := $41
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DCMD := $42 ; Command code
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BUFFER := $44 ; Buffer address
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BLOCK := $46 ; Block number
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R30 := $0478
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R31 := $04F8
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R32 := $0578
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R33 := $05F8
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CURSLOT := $07F8 ; $Cs
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OAPPLE := $C061 ; open apple key
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DATA := $C080
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CTRL := DATA+1
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DIV := DATA+2
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SS := DATA+3
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; Constants
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DUMMY = $FF
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FRX = $10 ; CTRL register
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ECE = $04
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SS0 = $01 ; SS register
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SDHC = $10
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WP = $20
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CD = $40
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INITED = $80
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229
src/AppleIISd.s
229
src/AppleIISd.s
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@ -10,41 +10,17 @@
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;
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;*******************************
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.import COMMAND
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.import SDCMD
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.import GETBLOCK
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.import CARDDET
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.import WRPROT
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.import GETR1
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.import GETR3
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.include "AppleIISd.inc"
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.define DEBUG 0
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; Memory defines
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SLOT16 := $2B ; $s0 -> slot * 16
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SLOT := $3D ; $0s
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CMDLO := $40
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CMDHI := $41
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DCMD := $42 ; Command code
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BUFFER := $44 ; Buffer address
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BLOCK := $46 ; Block number
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R30 := $0478
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R31 := $04F8
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R32 := $0578
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R33 := $05F8
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CURSLOT := $07F8 ; $Cs
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OAPPLE := $C061 ; open apple key
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DATA := $C080
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CTRL := DATA+1
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DIV := DATA+2
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SS := DATA+3
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; Constants
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DUMMY = $FF
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FRX = $10 ; CTRL register
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ECE = $04
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SS0 = $01 ; SS register
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SDHC = $10
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WP = $20
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CD = $40
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INITED = $80
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; signature bytes
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@ -431,190 +407,6 @@ INIT: LDA #$03 ; set SPI mode 3
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RTS
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;*******************************
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;
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; Send SD command
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; Call with command in CMDHI and CMDLO
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;
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;*******************************
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SDCMD: PHY
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LDY #0
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@LOOP: LDA (CMDLO),Y
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STA DATA,X
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@WAIT: BIT CTRL,X ; TC is in N
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BPL @WAIT
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INY
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CPY #6
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BCC @LOOP
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PLY
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RTS
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;*******************************
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;
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; Get R1
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; R1 is in A
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;
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;*******************************
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GETR1: LDA #DUMMY
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STA DATA,X
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@WAIT: BIT CTRL,X
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BPL @WAIT
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LDA DATA,X ; get response
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BIT #$80
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BNE GETR1 ; wait for MSB=0
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PHA
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LDA #DUMMY
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STA DATA,X ; send another dummy
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PLA ; restore R1
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RTS
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;*******************************
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;
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; Get R3
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; R1 is in A
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; R3 is in scratchpad ram
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;
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;*******************************
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GETR3: JSR GETR1 ; get R1 first
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PHA ; save R1
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PHY ; save Y
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LDY #04 ; load counter
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@LOOP: LDA #DUMMY ; send dummy
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STA DATA,X
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@WAIT: BIT CTRL,X
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BPL @WAIT
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LDA DATA,X
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PHA
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DEY
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BNE @LOOP ; do 4 times
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LDY SLOT
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PLA
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STA R33,Y ; save R3
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PLA
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STA R32,Y
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PLA
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STA R31,Y
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PLA
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STA R30,Y
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PLY ; restore Y
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LDA #DUMMY
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STA DATA,X ; send another dummy
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PLA ; restore R1
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RTS
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;*******************************
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;
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; Calculate block address
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; Unit number is in $43 DSSS0000
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; Block no is in $46-47
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; Address is in R30-R33
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;
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;*******************************
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GETBLOCK: PHX ; save X
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PHY ; save Y
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TXA
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TAY ; SLOT16 is now in Y
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LDX SLOT
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LDA BLOCK ; store block num
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STA R33,X ; in R30-R33
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LDA BLOCK+1
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STA R32,X
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LDA #0
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STA R31,X
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STA R30,X
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LDA #$80 ; drive number
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AND $43
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BEQ @SDHC ; D1
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LDA #1 ; D2
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STA R31,X
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@SDHC: LDA #SDHC
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AND SS,Y ; if card is SDHC,
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BNE @END ; use block addressing
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LDY #9 ; ASL can't be used with Y
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@LOOP: ASL R33,X ; mul block num
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ROL R32,X ; by 512 to get
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ROL R31,X ; real address
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ROL R30,X
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DEY
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BNE @LOOP
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@END: PLY ; restore Y
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PLX ; restore X
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RTS
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;*******************************
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;
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; Send SD command
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; Cmd is in A
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;
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;*******************************
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COMMAND: PHY ; save Y
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LDY SLOT
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STA DATA,X ; send command
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LDA R30,Y ; get arg from R30 on
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STA DATA,X
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LDA R31,Y
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STA DATA,X
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LDA R32,Y
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STA DATA,X
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LDA R33,Y
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STA DATA,X
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LDA #DUMMY
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STA DATA,X ; dummy crc
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JSR GETR1
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PLY ; restore Y
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RTS
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;*******************************
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;
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; Check for card detect
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;
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; C Clear - card in slot
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; Set - no card in slot
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;
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;*******************************
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CARDDET: PHA
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LDA #CD ; 0: card in
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BIT SS,X ; 1: card out
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CLC
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BEQ @DONE ; card is in
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SEC ; card is out
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@DONE: PLA
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RTS
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;*******************************
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;
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; Check for write protect
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;
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; C Clear - card not protected
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; Set - card write protected
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;
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;*******************************
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WRPROT: PHA
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LDA #WP ; 0: write enabled
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BIT SS,X ; 1: write disabled
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CLC
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BEQ @DONE
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SEC
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@DONE: PLA
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RTS
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;*******************************
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;
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; Status request
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@ -885,4 +677,3 @@ ACMD4140: .byt $69, $40, $00
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.byt $00, $00, $77
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ACMD410: .byt $69, $00, $00
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.byt $00, $00, $FF
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206
src/Helper.s
Normal file
206
src/Helper.s
Normal file
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@ -0,0 +1,206 @@
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;*******************************
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;
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; Apple][Sd Firmware
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; Version 1.0
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;
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; (c) Florian Reitz, 2017
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;
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; X register usually contains SLOT16
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; Y register is used for counting or SLOT
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;
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;*******************************
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.export COMMAND
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.export SDCMD
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.export GETBLOCK
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.export CARDDET
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.export WRPROT
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.export GETR1
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.export GETR3
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.include "AppleIISd.inc"
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.segment "EXTROM"
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;*******************************
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;
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; Send SD command
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; Call with command in CMDHI and CMDLO
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;
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;*******************************
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SDCMD: PHY
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LDY #0
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@LOOP: LDA (CMDLO),Y
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STA DATA,X
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@WAIT: BIT CTRL,X ; TC is in N
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BPL @WAIT
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INY
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CPY #6
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BCC @LOOP
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PLY
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RTS
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;*******************************
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;
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; Get R1
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; R1 is in A
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;
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;*******************************
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GETR1: LDA #DUMMY
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STA DATA,X
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@WAIT: BIT CTRL,X
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BPL @WAIT
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LDA DATA,X ; get response
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BIT #$80
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BNE GETR1 ; wait for MSB=0
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PHA
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LDA #DUMMY
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STA DATA,X ; send another dummy
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PLA ; restore R1
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RTS
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;*******************************
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;
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; Get R3
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; R1 is in A
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; R3 is in scratchpad ram
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;
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;*******************************
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GETR3: JSR GETR1 ; get R1 first
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PHA ; save R1
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PHY ; save Y
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LDY #04 ; load counter
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@LOOP: LDA #DUMMY ; send dummy
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STA DATA,X
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@WAIT: BIT CTRL,X
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BPL @WAIT
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LDA DATA,X
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PHA
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DEY
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BNE @LOOP ; do 4 times
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LDY SLOT
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PLA
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STA R33,Y ; save R3
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PLA
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STA R32,Y
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PLA
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STA R31,Y
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PLA
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STA R30,Y
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PLY ; restore Y
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LDA #DUMMY
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STA DATA,X ; send another dummy
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PLA ; restore R1
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RTS
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;*******************************
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;
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; Calculate block address
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; Unit number is in $43 DSSS0000
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; Block no is in $46-47
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; Address is in R30-R33
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;
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;*******************************
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GETBLOCK: PHX ; save X
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PHY ; save Y
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TXA
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TAY ; SLOT16 is now in Y
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LDX SLOT
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LDA BLOCK ; store block num
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STA R33,X ; in R30-R33
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LDA BLOCK+1
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STA R32,X
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LDA #0
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STA R31,X
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STA R30,X
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LDA #$80 ; drive number
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AND $43
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BEQ @SDHC ; D1
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LDA #1 ; D2
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STA R31,X
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@SDHC: LDA #SDHC
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AND SS,Y ; if card is SDHC,
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BNE @END ; use block addressing
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LDY #9 ; ASL can't be used with Y
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@LOOP: ASL R33,X ; mul block num
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ROL R32,X ; by 512 to get
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ROL R31,X ; real address
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ROL R30,X
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DEY
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BNE @LOOP
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@END: PLY ; restore Y
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PLX ; restore X
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RTS
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;*******************************
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;
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; Send SD command
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; Cmd is in A
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;
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;*******************************
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COMMAND: PHY ; save Y
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LDY SLOT
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STA DATA,X ; send command
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LDA R30,Y ; get arg from R30 on
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STA DATA,X
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LDA R31,Y
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STA DATA,X
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LDA R32,Y
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STA DATA,X
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LDA R33,Y
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STA DATA,X
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LDA #DUMMY
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STA DATA,X ; dummy crc
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JSR GETR1
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PLY ; restore Y
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RTS
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;*******************************
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;
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; Check for card detect
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;
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; C Clear - card in slot
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; Set - no card in slot
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;
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;*******************************
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CARDDET: PHA
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LDA #CD ; 0: card in
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BIT SS,X ; 1: card out
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CLC
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BEQ @DONE ; card is in
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SEC ; card is out
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@DONE: PLA
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RTS
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;*******************************
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;
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; Check for write protect
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;
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; C Clear - card not protected
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; Set - card write protected
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;
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;*******************************
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WRPROT: PHA
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LDA #WP ; 0: write enabled
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BIT SS,X ; 1: write disabled
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CLC
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BEQ @DONE
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SEC
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@DONE: PLA
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RTS
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Loading…
Reference in New Issue
Block a user