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Support for second partition, card detect and write protect added

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This commit is contained in:
Florian Reitz 2017-09-09 20:34:24 +02:00
parent b845ad2cc9
commit 2a06e1ba5d
7 changed files with 1511 additions and 1380 deletions
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BIN
AppleIISd.bin
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AppleIISd.hex Normal file
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1399
AppleIISd.lst
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188
AppleIISd.s
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@ -45,7 +45,7 @@ FRX = $10 ; CTRL register
ECE = $04 ECE = $04
SS0 = $01 ; SS register SS0 = $01 ; SS register
WP = $20 WP = $20
CARDDET = $40 CD = $40
INITED = $80 INITED = $80
@ -65,28 +65,30 @@ INITED = $80
STA CURSLOT STA CURSLOT
LDA #$40 LDA #$40
STA SLOT16 STA SLOT16
ELSE ELSE
JSR $FF58 JSR $FF58
TSX TSX
LDA $0100,X LDA $0100,X
STA CURSLOT ; $Cs
AND #$0F AND #$0F
STA SLOT ; $0s STA SLOT ; $0s
ORA #$C0
STA CURSLOT ; $Cs
ASL A ASL A
ASL A ASL A
ASL A ASL A
ASL A ASL A
STA SLOT16 ; $s0 STA SLOT16 ; $s0
FIN FIN
TAX ; X holds now SLOT16 TAX ; X holds now SLOT16
BIT $CFFF BIT $CFFF
JSR INIT JSR CARDDET
BCC :INIT
LDA #$27 ; no card inserted
BRK
:INIT JSR INIT
*
* TODO: check for init error
*
******************************** ********************************
* *
@ -144,7 +146,11 @@ INSTALL LDA $BF32,X ; get a devnum
ELSE ELSE
BOOT LDA #$01 BOOT CMP #0 ; check for error
BEQ :BOOT1
BRK
:BOOT1 LDA #$01
STA $42 ; load command STA $42 ; load command
LDA SLOT16 LDA SLOT16
TAX TAX
@ -168,6 +174,7 @@ BOOT LDA #$01
******************************** ********************************
DRIVER CLD DRIVER CLD
DO DEBUG DO DEBUG
LDA #$04 LDA #$04
STA SLOT STA SLOT
@ -175,38 +182,44 @@ DRIVER CLD
STA CURSLOT STA CURSLOT
LDA #$40 LDA #$40
STA SLOT16 STA SLOT16
ELSE ELSE
JSR $FF58 ; find slot nr JSR $FF58 ; find slot nr
TSX TSX
LDA $0100,X LDA $0100,X
STA CURSLOT ; $Cs
AND #$0F AND #$0F
STA SLOT ; $0s STA SLOT ; $0s
ORA #$C0
STA CURSLOT ; $Cs
ASL A ASL A
ASL A ASL A
ASL A ASL A
ASL A ASL A
STA SLOT16 ; $s0 STA SLOT16 ; $s0
FIN FIN
TAX ; X holds now SLOT16
TAX ; X holds now SLOT16
BIT $CFFF BIT $CFFF
LDA #INITED ; check for init JSR CARDDET
BCC :INITED
LDA #$27 ; no card inserted
BRA :DONE
:INITED LDA #INITED ; check for init
BIT SS,X BIT SS,X
BEQ :INIT BEQ :INIT
:CMD LDA $42 ; get command :CMD LDA $42 ; get command
CMP #$00 CMP #0
BEQ :STATUS BEQ :STATUS
CMP #$01 CMP #1
BEQ :READ BEQ :READ
CMP #$02 CMP #2
BEQ :WRITE BEQ :WRITE
CMP #$03 CMP #3
BEQ :FORMAT BEQ :FORMAT
SEC ; unknown command LDA #1 ; unknown command
LDA #$01
:DONE SEC
RTS RTS
:STATUS JMP STATUS :STATUS JMP STATUS
@ -221,8 +234,8 @@ DRIVER CLD
DS \ ; fill with zeroes DS \ ; fill with zeroes
DS -4 ; locate to $xxFC DS -4 ; locate to $xxFC
DW $FFFF ; 65535 blocks DW $0000 ; use status request
DB $47 ; Status bits DB $17 ; Status bits
DB #<DRIVER ; LSB of driver DB #<DRIVER ; LSB of driver
@ -442,6 +455,7 @@ GETR3 JSR GETR1 ; get R1 first
******************************** ********************************
* *
* Calculate block address * Calculate block address
* Unit number is in $43 DSSS0000
* Block no is in $46-47 * Block no is in $46-47
* Address is in R30-R33 * Address is in R30-R33
* *
@ -458,7 +472,13 @@ BLOCK PHX ; save X
STA R31,X STA R31,X
STA R30,X STA R30,X
LDY #9 ; ASL can't be used with Y LDA #$80 ; drive number
BIT $43
BEQ :SHIFT ; D1
LDA #1 ; D2
STA R31,X
:SHIFT LDY #9 ; ASL can't be used with Y
:LOOP ASL R33,X ; mul block num :LOOP ASL R33,X ; mul block num
ROL R32,X ; by 512 to get ROL R32,X ; by 512 to get
ROL R31,X ; real address ROL R31,X ; real address
@ -495,6 +515,44 @@ COMMAND PHY ; save Y
RTS RTS
********************************
*
* Check for card detect
*
* C Clear - card in slot
* Set - no card in slot
*
********************************
CARDDET PHA
LDA #CD ; 0: card in
BIT SS,X ; 1: card out
CLC
BEQ :DONE ; card is in
SEC ; card is out
:DONE PLA
RTS
********************************
*
* Check for write protect
*
* C Clear - card not protected
* Set - card write protected
*
********************************
WRPROT PHA
LDA #WP ; 0: write enabled
BIT SS,X ; 1: write disabled
CLC
BEQ :DONE
SEC
:DONE PLA
RTS
******************************** ********************************
* *
* Status request * Status request
@ -508,18 +566,20 @@ COMMAND PHY ; save Y
* $27 - I/O error * $27 - I/O error
* $28 - No card inserted / no init * $28 - No card inserted / no init
* $2B - Card write protected * $2B - Card write protected
* x - Blocks avail (low byte) * X - Blocks avail (low byte)
* y - Blocks avail (high byte) * Y - Blocks avail (high byte)
* *
******************************** ********************************
STATUS CLC ; no error STATUS LDA #0 ; no error
LDA #0
LDX #$FF ; 32 MB partition LDX #$FF ; 32 MB partition
LDY #$FF LDY #$FF
RTS
* TODO: check for card detect and write protect! JSR WRPROT
BCC :DONE
LDA #$2B ; card write protected
:DONE RTS
******************************** ********************************
@ -537,9 +597,10 @@ STATUS CLC ; no error
* *
******************************** ********************************
* TODO: check for card detect! READ JSR CARDDET
BCS :ERROR ; no card inserted
READ JSR BLOCK ; calc block address JSR BLOCK ; calc block address
LDA SS,X ; enable /CS LDA SS,X ; enable /CS
AND #$FF!SS0 AND #$FF!SS0
@ -573,32 +634,34 @@ READ JSR BLOCK ; calc block address
DEY DEY
BNE :LOOPY BNE :LOOPY
:CRC LDA DATA,X ; read two bytes crc
LDA DATA,X ; and ignore
LDA DATA,X ; read a dummy byte
LDA CTRL,X ; disable FRX LDA CTRL,X ; disable FRX
AND #$FF!FRX AND #$FF!FRX
STA CTRL,X STA CTRL,X
CLC ; no error
LDA #0
:CRC LDA #DUMMY ; first crc byte has :DONE PHP
STA DATA,X ; already been read PHA
LDA SS,X LDA SS,X
ORA #SS0 ORA #SS0
STA SS,X ; disable /CS STA SS,X ; disable /CS
CLC ; no error PLA
LDA #$00 PLP
RTS RTS
:ERROR LDA SS,X :ERROR SEC ; an error occured
ORA #SS0
STA SS,X ; disable /CS
SEC ; an error occured
LDA #$27 LDA #$27
RTS BRA :DONE
******************************** ********************************
* *
* Write 512 byte block * Write 512 byte block
* $43 Unit number DSSS000 * $43 Unit number DSSS0000
* $44-45 Address (LO/HI) of buffer * $44-45 Address (LO/HI) of buffer
* $46-47 Block number (LO/HI) * $46-47 Block number (LO/HI)
* *
@ -606,14 +669,17 @@ READ JSR BLOCK ; calc block address
* Set - Error * Set - Error
* A $00 - No error * A $00 - No error
* $27 - I/O error or bad block number * $27 - I/O error or bad block number
* $28 - No card inserted
* $2B - Card write protected * $2B - Card write protected
* *
******************************** ********************************
* TODO: check for card detect and write protect! WRITE JSR CARDDET
BCS :IOERROR ; no card inserted
WRITE JSR BLOCK ; calc block address JSR WRPROT
BCS :WPERROR ; card write protected
JSR BLOCK ; calc block address
LDA SS,X ; enable /CS LDA SS,X ; enable /CS
AND #$FF!SS0 AND #$FF!SS0
@ -622,7 +688,7 @@ WRITE JSR BLOCK ; calc block address
JSR COMMAND ; send command JSR COMMAND ; send command
CMP #0 ; check for error CMP #0 ; check for error
BNE :ERROR BNE :IOERROR
LDA #DUMMY LDA #DUMMY
STA DATA,X ; send dummy STA DATA,X ; send dummy
@ -648,33 +714,33 @@ WRITE JSR BLOCK ; calc block address
LDA DATA,X LDA DATA,X
AND #$1F AND #$1F
CMP #$05 CMP #$05
BNE :ERROR ; check for write error BNE :IOERROR ; check for write error
CLC ; no error
LDA #0
:WAIT6 LDA #DUMMY :DONE PHP
PHA
:WAIT LDA #DUMMY
STA DATA,X ; wait for write cycle STA DATA,X ; wait for write cycle
LDA DATA,X ; to complete LDA DATA,X ; to complete
CMP #$00 CMP #$00
BEQ :WAIT6 BEQ :WAIT
LDA SS,X ; disable /CS LDA SS,X ; disable /CS
ORA #SS0 ORA #SS0
STA SS,X STA SS,X
CLC ; no error PLA
LDA #0 PLP
RTS RTS
:ERROR LDA #DUMMY :IOERROR SEC ; an error occured
STA DATA,X ; wait for write cycle
LDA DATA,X ; to complete
CMP #$00
BEQ :ERROR
LDA SS,X
ORA #SS0
STA SS,X ; disable /CS
SEC ; an error occured
LDA #$27 LDA #$27
RTS BRA :DONE
:WPERROR SEC
LDA #$2B
BRA :DONE
******************************** ********************************

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AppleIISd.s19
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7
README.md
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@ -8,14 +8,17 @@ A Xilinx CPLD is used as a SPI controller and translates, together with the ROM
The assembler sources were written in Merlin-8. The [schematics](AppleIISd.pdf) are available as PDF. The assembler sources were written in Merlin-8. The [schematics](AppleIISd.pdf) are available as PDF.
## Features ## Features
* up to 128MB storage space (4x 65535 blocks), currently 32MB * up to 64MB storage space (2x 65535 blocks)
* ProDOS driver in ROM * ProDOS driver in ROM
* Auto boot * Auto boot
* Access LED * Access LED
* Card detect and write protect sensing
## Requirements ## Requirements
The Apple][Sd requires and has been tested on an enhanced IIe computer. The ROM code uses some 65c02 opcodes and will therefore not work on a II, II+ or unenhanced IIe. ProDOS versions 1.1 to 2.4.1 seem to work. The Apple][Sd requires and has been tested on an enhanced IIe computer. The ROM code uses some 65c02 opcodes and will therefore not work on a II, II+ or unenhanced IIe. ProDOS versions 1.1 to 2.4.1 seem to work.
When a 2732 type ROM is used, the binary image has to be programmed at offset 0x800, because A11 is always high for compatibility with 2716 type ROMs.
## Timing ## Timing
The clock of the SPI bus *SCK* may be derived from either *Phi0* or the *7M* clock. Additionally, the divisor may be 2 to 8. The clock of the SPI bus *SCK* may be derived from either *Phi0* or the *7M* clock. Additionally, the divisor may be 2 to 8.
@ -52,8 +55,6 @@ LDA $C0C0
## TODOs ## TODOs
* Much more testing * Much more testing
* Support more than one partition
* Implement card detect and write protect sensing
* SRAM option (may never work, though) * SRAM option (may never work, though)
* Find a use for the IRQ pin * Find a use for the IRQ pin
* Use 28 pin socket to support other EPROMS than 2716 and 2732 * Use 28 pin socket to support other EPROMS than 2716 and 2732

1173
VHDL/appleiisd.jed
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