Update firmware source to be relocatable
This commit is contained in:
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Binary file not shown.
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@ -1,61 +1,13 @@
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;Please note this code is assembled seven times,
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;once for each slot in the Apple II.
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;This allows the card to work in any slot without
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;having to write space consuming relocatable code.
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writeLatchHigh = $C081
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writeLatchLow = $C080
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;Install cc65 (on Ubuntu this is: sudo apt install cc65)
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;Execute the following commands to generate the binary:
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;ca65 Warning.asm -o warning.o
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;ca65 Firmware.asm -D SLOT1 -o slot1.o
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;ca65 Firmware.asm -D SLOT2 -o slot2.o
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;ca65 Firmware.asm -D SLOT3 -o slot3.o
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;ca65 Firmware.asm -D SLOT4 -o slot4.o
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;ca65 Firmware.asm -D SLOT5 -o slot5.o
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;ca65 Firmware.asm -D SLOT6 -o slot6.o
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;ca65 Firmware.asm -D SLOT7 -o slot7.o
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;ld65 -t none warning.o slot1.o slot2.o slot3.o slot4.o slot5.o slot6.o slot7.o -o Firmware.bin
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;Determine which slot we want by command-line define
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.ifdef SLOT1
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slot = $01
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.endif
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.ifdef SLOT2
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slot = $02
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.endif
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.ifdef SLOT3
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slot = $03
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.endif
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.ifdef SLOT4
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slot = $04
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.endif
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.ifdef SLOT5
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slot = $05
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.endif
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.ifdef SLOT6
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slot = $06
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.endif
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.ifdef SLOT7
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slot = $07
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.endif
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;Calculate I/O addresses for this slot
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slotwh = $C081+slot*$10
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slotwl = $C080+slot*$10
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slotrd = $C080+slot*$10
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sdrive = slot*$10
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sram0 = $478+slot
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sram1 = $4F8+slot
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sram2 = $578+slot
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sram3 = $5F8+slot
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sram4 = $678+slot
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sram5 = $6F8+slot
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sram6 = $778+slot
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sram7 = $7F8+slot
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;temp variables becasue 6502 only has 3 registers
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highLatch = $F8
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lowLatch = $F9
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tempY = $FE
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blockHalfCounter = $FF
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;ProDOS defines
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command = $42 ;ProDOS command
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unit = $43 ;7=drive 6-4=slot 3-0=not used
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buflo = $44 ;low address of buffer
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@ -66,10 +18,17 @@
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nodev = $28 ;no device connected
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wperr = $2B ;write protect error
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.org $C000+slot*$100
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;code is non-relocatable
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; but duplicated seven times,
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; once for each slot
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;for relocatable code, address to jump to instead of JSR absolute + RTS
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jumpAddressLo = $FA
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jumpAddressHi = $FB
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ioAddressLo = $FC
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ioAddressHi = $FD
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knownRts = $FF58
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.org $C700
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;code is relocatable
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; but set to $c700 for
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; readability
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;ID bytes for booting and drive detection
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cpx #$20 ;ID bytes for ProDOS and the
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@ -77,118 +36,147 @@
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cpx #$03 ;
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cpx #$3C ;this one for older II's
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;zero out block numbers and buffer address
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sty buflo
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sty blklo
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sty blkhi
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iny ;set command = 1 for read block
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sty command
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sty jumpAddressLo ;$01 of $0801 where boot code starts
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jsr knownRts ;jump to known RTS to get our address from the stack
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tsx
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lda $0100,x ;this for example would be $C7 in slot 7
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sta bufhi ;keep the slot here
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asl
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asl
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asl
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asl
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tax
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;display copyright message
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ldy #$00
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drawtxt: lda text,y
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beq boot ;check for NULL
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ora #$80 ;make it visible to the Apple
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ldy #<text
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drawtxt: lda (buflo),y
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sta $07D0,y ;put text on last line
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iny
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bpl drawtxt
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bne drawtxt
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;load first two blocks and execute to boot
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boot: lda #$01 ;set read command
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sta command
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lda #sdrive ;set slot and unit
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sta unit
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lda #$00 ;block 0
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sta blklo
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sta blkhi
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sta buflo ;buffer at $800
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;load block 0000 at $0800
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lda #$08
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sta bufhi
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jsr entry ;get the block
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ldx #sdrive ;set up for slot n
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jmp $801 ;execute the block
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sta jumpAddressHi
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stx unit
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bne start
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;This is the ProDOS entry point for this card
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entry: lda #sdrive ;unit number is $n0 - n = slot
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cmp unit ;make sure same as ProDOS
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beq docmd ;yep, do command
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sec ;nope, set device not connected
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entry:
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lda #<knownRts
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sta jumpAddressLo
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lda #>knownRts
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sta jumpAddressHi
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start:
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lda #$C0
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sta ioAddressHi
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jsr knownRts
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tsx
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lda $0100,x
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asl a
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asl a
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asl a
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asl a
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tax
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cpx unit ;make sure same as ProDOS
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beq docmd ;yep, do command
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sec ;nope, set device not connected
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lda #nodev
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rts ;go back to ProDOS
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docmd: lda command ;get ProDOS command
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docmd:
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lda command
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beq getstat ;command 0 is GetStatus
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cmp #$01 ;
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cmp #$01
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beq readblk ;command 1 is ReadBlock
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sec ;Format/Write not permitted
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lda #wperr ;write protect error
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rts ;go back to ProDOS
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getstat: clc ;send back status
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getstat:
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clc ;send back status
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lda #$00 ;good status
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ldx #$00 ;1024 blocks
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ldy #$04 ;
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rts
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readblk: lda blkhi ;get hi block
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readblk:
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lda blkhi ;get hi block
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asl a ;shift up to top 3 bits
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asl a ;since that's all the high
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asl a ;blocks we can handle
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asl a ;
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asl a ;
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sta sram0 ;save it in scratch ram 0
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sta highLatch ;save it in scratch ram 0
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;so we can stuff it in the
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;high latch later
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lda blklo ;get low block
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lsr a ;shift so we get the top 5
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lsr a ;bits - this also goes in
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lsr a ;the high latch
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ora sram0 ;add it to those top 3 bits
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sta sram0 ;save it back in scratch ram
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ora highLatch ;add it to those top 3 bits
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sta highLatch ;save it back in scratch ram
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lda blklo ;get low block
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asl a ;shift it to top 3 bits
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asl a ;
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asl a ;
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asl a ;
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asl a ;
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sta sram1 ;save it in scratch ram
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sta lowLatch
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lda #$02
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sta blockHalfCounter
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jsr get256 ;get first half of block
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lda sram1 ;get low latch
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and #$F0 ;clear bottom 4 bits
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ora #$10 ;set bit 5 for second half
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;of 512 byte block
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sta sram1 ;save it back in scratch
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inc bufhi ;write 2nd block up 256 bytes
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jsr get256 ;get second half of block
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dec bufhi ;put ProDOS buffer back
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;This gets 256 bytes from the ROM card
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read256:
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ldy #$00
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lda highLatch ;get high latch value
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sta writeLatchHigh,x ;set high latch for card
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loop256:
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lda lowLatch
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sta writeLatchLow,x
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txa
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ora #$80
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sta ioAddressLo
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loop16:
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sty tempY
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ldy #$00
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lda (ioAddressLo),y
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ldy tempY
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sta (buflo),y
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iny
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inc ioAddressLo
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lda ioAddressLo
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and #$0F
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bne loop16
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inc lowLatch
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cpy #$00
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bne loop256
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dec blockHalfCounter
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bne readnext256
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dec bufhi
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clc ;clear error code for success
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lda #$00
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rts ;return to ProDOS
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;This gets 256 bytes from the ROM card
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;assuming high latch value is in sram0
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;and low latch value is in sram1
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get256: ldy #$00 ;clear buffer counter
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lda sram0 ;get high latch value
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sta slotwh ;set high latch for card
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readnext256:
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inc bufhi
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clc
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bcc read256
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loop256: ldx #$00 ;clear port counter
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lda sram1 ;get low latch value
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sta slotwl ;set low latch
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;macro for string with high-bit set
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.macro aschi str
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.repeat .strlen (str), c
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.byte .strat (str, c) | $80
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.endrep
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.endmacro
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loop16: lda slotrd,x ;get a byte
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sta (buflo),y ;write into the buffer
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iny
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inx
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cpx #$10
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bne loop16 ;go until 16 bytes read
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inc sram1 ;next 16 bytes
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cpy #$00
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bne loop256 ;go until 256 total
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rts
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text: .byte "ROM-Drive (c)1998-2019 Terence J. Boldt"
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text: aschi "ROM-Drive (c)1998-2021 Terence J. Boldt"
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end:
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.byte 0
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Binary file not shown.
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@ -0,0 +1,201 @@
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ca65 V2.18 - N/A
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Main file : Firmware.asm
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Current file: Firmware.asm
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000000r 1 writeLatchHigh = $C081
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000000r 1 writeLatchLow = $C080
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000000r 1
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000000r 1 ;temp variables becasue 6502 only has 3 registers
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000000r 1 highLatch = $F8
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000000r 1 lowLatch = $F9
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000000r 1 tempY = $FE
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000000r 1 blockHalfCounter = $FF
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000000r 1
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000000r 1 ;ProDOS defines
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000000r 1 command = $42 ;ProDOS command
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000000r 1 unit = $43 ;7=drive 6-4=slot 3-0=not used
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000000r 1 buflo = $44 ;low address of buffer
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000000r 1 bufhi = $45 ;hi address of buffer
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000000r 1 blklo = $46 ;low block
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000000r 1 blkhi = $47 ;hi block
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000000r 1 ioerr = $27 ;I/O error code
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000000r 1 nodev = $28 ;no device connected
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000000r 1 wperr = $2B ;write protect error
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000000r 1
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000000r 1 ;for relocatable code, address to jump to instead of JSR absolute + RTS
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000000r 1 jumpAddressLo = $FA
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000000r 1 jumpAddressHi = $FB
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000000r 1 ioAddressLo = $FC
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000000r 1 ioAddressHi = $FD
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000000r 1 knownRts = $FF58
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000000r 1
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000000r 1 .org $C700
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00C700 1 ;code is relocatable
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00C700 1 ; but set to $c700 for
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00C700 1 ; readability
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00C700 1
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00C700 1 ;ID bytes for booting and drive detection
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00C700 1 E0 20 cpx #$20 ;ID bytes for ProDOS and the
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00C702 1 E0 00 cpx #$00 ; Apple Autostart ROM
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00C704 1 E0 03 cpx #$03 ;
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00C706 1 E0 3C cpx #$3C ;this one for older II's
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00C708 1
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00C708 1 ;zero out block numbers and buffer address
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00C708 1 84 44 sty buflo
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00C70A 1 84 46 sty blklo
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00C70C 1 84 47 sty blkhi
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00C70E 1 C8 iny ;set command = 1 for read block
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00C70F 1 84 42 sty command
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00C711 1 84 FA sty jumpAddressLo ;$01 of $0801 where boot code starts
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00C713 1 20 58 FF jsr knownRts ;jump to known RTS to get our address from the stack
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00C716 1 BA tsx
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00C717 1 BD 00 01 lda $0100,x ;this for example would be $C7 in slot 7
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00C71A 1 85 45 sta bufhi ;keep the slot here
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00C71C 1 0A asl
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00C71D 1 0A asl
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00C71E 1 0A asl
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00C71F 1 0A asl
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00C720 1 AA tax
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00C721 1
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00C721 1 ;display copyright message
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00C721 1 A0 C1 ldy #<text
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00C723 1 B1 44 drawtxt: lda (buflo),y
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00C725 1 99 D0 07 sta $07D0,y ;put text on last line
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00C728 1 C8 iny
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00C729 1 D0 F8 bne drawtxt
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00C72B 1
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00C72B 1 ;load block 0000 at $0800
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00C72B 1 A9 08 lda #$08
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00C72D 1 85 45 sta bufhi
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00C72F 1 85 FB sta jumpAddressHi
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00C731 1 86 43 stx unit
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00C733 1 D0 08 bne start
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00C735 1 entry:
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00C735 1 A9 58 lda #<knownRts
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00C737 1 85 FA sta jumpAddressLo
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00C739 1 A9 FF lda #>knownRts
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00C73B 1 85 FB sta jumpAddressHi
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00C73D 1 start:
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00C73D 1 A9 C0 lda #$C0
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00C73F 1 85 FD sta ioAddressHi
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00C741 1 20 58 FF jsr knownRts
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00C744 1 BA tsx
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00C745 1 BD 00 01 lda $0100,x
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00C748 1 0A asl a
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00C749 1 0A asl a
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00C74A 1 0A asl a
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00C74B 1 0A asl a
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00C74C 1 AA tax
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00C74D 1 E4 43 cpx unit ;make sure same as ProDOS
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00C74F 1 F0 04 beq docmd ;yep, do command
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00C751 1 38 sec ;nope, set device not connected
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00C752 1 A9 28 lda #nodev
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00C754 1 60 rts ;go back to ProDOS
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00C755 1
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00C755 1 docmd:
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00C755 1 A5 42 lda command
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00C757 1 F0 08 beq getstat ;command 0 is GetStatus
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00C759 1 C9 01 cmp #$01
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00C75B 1 F0 0C beq readblk ;command 1 is ReadBlock
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00C75D 1 38 sec ;Format/Write not permitted
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00C75E 1 A9 2B lda #wperr ;write protect error
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00C760 1 60 rts ;go back to ProDOS
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00C761 1
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00C761 1 getstat:
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00C761 1 18 clc ;send back status
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00C762 1 A9 00 lda #$00 ;good status
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00C764 1 A2 00 ldx #$00 ;1024 blocks
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00C766 1 A0 04 ldy #$04 ;
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00C768 1 60 rts
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00C769 1
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00C769 1 readblk:
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00C769 1 A5 47 lda blkhi ;get hi block
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00C76B 1 0A asl a ;shift up to top 3 bits
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00C76C 1 0A asl a ;since that's all the high
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00C76D 1 0A asl a ;blocks we can handle
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00C76E 1 0A asl a ;
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00C76F 1 0A asl a ;
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00C770 1 85 F8 sta highLatch ;save it in scratch ram 0
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00C772 1 ;so we can stuff it in the
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00C772 1 ;high latch later
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00C772 1 A5 46 lda blklo ;get low block
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00C774 1 4A lsr a ;shift so we get the top 5
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00C775 1 4A lsr a ;bits - this also goes in
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00C776 1 4A lsr a ;the high latch
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00C777 1 05 F8 ora highLatch ;add it to those top 3 bits
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00C779 1 85 F8 sta highLatch ;save it back in scratch ram
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00C77B 1 A5 46 lda blklo ;get low block
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00C77D 1 0A asl a ;shift it to top 3 bits
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00C77E 1 0A asl a ;
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00C77F 1 0A asl a ;
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00C780 1 0A asl a ;
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00C781 1 0A asl a ;
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00C782 1 85 F9 sta lowLatch
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00C784 1 A9 02 lda #$02
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00C786 1 85 FF sta blockHalfCounter
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00C788 1
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00C788 1 ;This gets 256 bytes from the ROM card
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00C788 1
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00C788 1 read256:
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00C788 1 A0 00 ldy #$00
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00C78A 1 A5 F8 lda highLatch ;get high latch value
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00C78C 1 9D 81 C0 sta writeLatchHigh,x ;set high latch for card
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00C78F 1 loop256:
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00C78F 1 A5 F9 lda lowLatch
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00C791 1 9D 80 C0 sta writeLatchLow,x
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00C794 1 8A txa
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00C795 1 09 80 ora #$80
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00C797 1 85 FC sta ioAddressLo
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00C799 1 loop16:
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00C799 1 84 FE sty tempY
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00C79B 1 A0 00 ldy #$00
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00C79D 1 B1 FC lda (ioAddressLo),y
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00C79F 1 A4 FE ldy tempY
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00C7A1 1 91 44 sta (buflo),y
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00C7A3 1 C8 iny
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00C7A4 1 E6 FC inc ioAddressLo
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00C7A6 1 A5 FC lda ioAddressLo
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00C7A8 1 29 0F and #$0F
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00C7AA 1 D0 ED bne loop16
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00C7AC 1 E6 F9 inc lowLatch
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00C7AE 1 C0 00 cpy #$00
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||||
00C7B0 1 D0 DD bne loop256
|
||||
00C7B2 1 C6 FF dec blockHalfCounter
|
||||
00C7B4 1 D0 06 bne readnext256
|
||||
00C7B6 1 C6 45 dec bufhi
|
||||
00C7B8 1 18 clc ;clear error code for success
|
||||
00C7B9 1 A9 00 lda #$00
|
||||
00C7BB 1 60 rts ;return to ProDOS
|
||||
00C7BC 1
|
||||
00C7BC 1 readnext256:
|
||||
00C7BC 1 E6 45 inc bufhi
|
||||
00C7BE 1 18 clc
|
||||
00C7BF 1 90 C7 bcc read256
|
||||
00C7C1 1
|
||||
00C7C1 1 ;macro for string with high-bit set
|
||||
00C7C1 1 .macro aschi str
|
||||
00C7C1 1 .repeat .strlen (str), c
|
||||
00C7C1 1 .byte .strat (str, c) | $80
|
||||
00C7C1 1 .endrep
|
||||
00C7C1 1 .endmacro
|
||||
00C7C1 1
|
||||
00C7C1 1 D2 CF CD AD text: aschi "ROM-Drive (c)1998-2021 Terence J. Boldt"
|
||||
00C7C5 1 C4 F2 E9 F6
|
||||
00C7C9 1 E5 A0 A8 E3
|
||||
00C7E8 1 end:
|
||||
00C7E8 1 00 .byte 0
|
||||
00C7E9 1
|
||||
00C7E9 1 ; These bytes need to be at the top of the 256 byte firmware as ProDOS
|
||||
00C7E9 1 ; uses these to find the entry point and drive capabilities
|
||||
00C7E9 1
|
||||
00C7E9 1 00 00 00 00 .repeat 251-<end
|
||||
00C7ED 1 00 00 00 00
|
||||
00C7F1 1 00 00 00 00
|
||||
00C7FC 1 .byte 0
|
||||
00C7FC 1 .endrepeat
|
||||
00C7FC 1
|
||||
00C7FC 1 00 00 .byte 0,0 ;0000 blocks = check status
|
||||
00C7FE 1 03 .byte 3 ;bit 0=read 1=status
|
||||
00C7FF 1 35 .byte entry&$00FF ;low byte of entry
|
||||
00C800 1
|
||||
00C800 1
|
|
@ -1,12 +1,5 @@
|
|||
#!/bin/sh
|
||||
ca65 Warning.asm -o warning.o
|
||||
ca65 Firmware.asm -D SLOT1 -o slot1.o
|
||||
ca65 Firmware.asm -D SLOT2 -o slot2.o
|
||||
ca65 Firmware.asm -D SLOT3 -o slot3.o
|
||||
ca65 Firmware.asm -D SLOT4 -o slot4.o
|
||||
ca65 Firmware.asm -D SLOT5 -o slot5.o
|
||||
ca65 Firmware.asm -D SLOT6 -o slot6.o
|
||||
ca65 Firmware.asm -D SLOT7 -o slot7.o
|
||||
ld65 -t none warning.o slot1.o slot2.o slot3.o slot4.o slot5.o slot6.o slot7.o -o Firmware.bin
|
||||
ca65 Firmware.asm -o firmware.o --listing Firmware.lst
|
||||
|
||||
cat Firmware.bin | dd of=BlankDriveWithFirmware.po bs=1 seek=1046528 count=2048 conv=notrunc
|
||||
ld65 -t none warning.o firmware.o -o Firmware.bin
|
||||
|
|
Binary file not shown.
Before Width: | Height: | Size: 78 KiB After Width: | Height: | Size: 69 KiB |
Binary file not shown.
Before Width: | Height: | Size: 99 KiB After Width: | Height: | Size: 89 KiB |
|
@ -1,12 +1,12 @@
|
|||
G04 #@! TF.GenerationSoftware,KiCad,Pcbnew,(5.1.10-1-10_14)*
|
||||
G04 #@! TF.CreationDate,2021-12-08T22:24:40-05:00*
|
||||
G04 #@! TF.CreationDate,2021-12-12T10:22:25-05:00*
|
||||
G04 #@! TF.ProjectId,ProDOS ROM-Drive 3.0,50726f44-4f53-4205-924f-4d2d44726976,3.0*
|
||||
G04 #@! TF.SameCoordinates,Original*
|
||||
G04 #@! TF.FileFunction,Copper,L2,Bot*
|
||||
G04 #@! TF.FilePolarity,Positive*
|
||||
%FSLAX46Y46*%
|
||||
G04 Gerber Fmt 4.6, Leading zero omitted, Abs format (unit mm)*
|
||||
G04 Created by KiCad (PCBNEW (5.1.10-1-10_14)) date 2021-12-08 22:24:40*
|
||||
G04 Created by KiCad (PCBNEW (5.1.10-1-10_14)) date 2021-12-12 10:22:25*
|
||||
%MOMM*%
|
||||
%LPD*%
|
||||
G01*
|
||||
|
|
|
@ -1,12 +1,12 @@
|
|||
G04 #@! TF.GenerationSoftware,KiCad,Pcbnew,(5.1.10-1-10_14)*
|
||||
G04 #@! TF.CreationDate,2021-12-08T22:24:40-05:00*
|
||||
G04 #@! TF.CreationDate,2021-12-12T10:22:25-05:00*
|
||||
G04 #@! TF.ProjectId,ProDOS ROM-Drive 3.0,50726f44-4f53-4205-924f-4d2d44726976,3.0*
|
||||
G04 #@! TF.SameCoordinates,Original*
|
||||
G04 #@! TF.FileFunction,Soldermask,Bot*
|
||||
G04 #@! TF.FilePolarity,Negative*
|
||||
%FSLAX46Y46*%
|
||||
G04 Gerber Fmt 4.6, Leading zero omitted, Abs format (unit mm)*
|
||||
G04 Created by KiCad (PCBNEW (5.1.10-1-10_14)) date 2021-12-08 22:24:40*
|
||||
G04 Created by KiCad (PCBNEW (5.1.10-1-10_14)) date 2021-12-12 10:22:25*
|
||||
%MOMM*%
|
||||
%LPD*%
|
||||
G01*
|
||||
|
|
|
@ -1,11 +1,11 @@
|
|||
G04 #@! TF.GenerationSoftware,KiCad,Pcbnew,(5.1.10-1-10_14)*
|
||||
G04 #@! TF.CreationDate,2021-12-08T22:24:40-05:00*
|
||||
G04 #@! TF.CreationDate,2021-12-12T10:22:25-05:00*
|
||||
G04 #@! TF.ProjectId,ProDOS ROM-Drive 3.0,50726f44-4f53-4205-924f-4d2d44726976,3.0*
|
||||
G04 #@! TF.SameCoordinates,Original*
|
||||
G04 #@! TF.FileFunction,Profile,NP*
|
||||
%FSLAX46Y46*%
|
||||
G04 Gerber Fmt 4.6, Leading zero omitted, Abs format (unit mm)*
|
||||
G04 Created by KiCad (PCBNEW (5.1.10-1-10_14)) date 2021-12-08 22:24:40*
|
||||
G04 Created by KiCad (PCBNEW (5.1.10-1-10_14)) date 2021-12-12 10:22:25*
|
||||
%MOMM*%
|
||||
%LPD*%
|
||||
G01*
|
||||
|
|
|
@ -1,12 +1,12 @@
|
|||
G04 #@! TF.GenerationSoftware,KiCad,Pcbnew,(5.1.10-1-10_14)*
|
||||
G04 #@! TF.CreationDate,2021-12-08T22:24:40-05:00*
|
||||
G04 #@! TF.CreationDate,2021-12-12T10:22:25-05:00*
|
||||
G04 #@! TF.ProjectId,ProDOS ROM-Drive 3.0,50726f44-4f53-4205-924f-4d2d44726976,3.0*
|
||||
G04 #@! TF.SameCoordinates,Original*
|
||||
G04 #@! TF.FileFunction,Copper,L1,Top*
|
||||
G04 #@! TF.FilePolarity,Positive*
|
||||
%FSLAX46Y46*%
|
||||
G04 Gerber Fmt 4.6, Leading zero omitted, Abs format (unit mm)*
|
||||
G04 Created by KiCad (PCBNEW (5.1.10-1-10_14)) date 2021-12-08 22:24:40*
|
||||
G04 Created by KiCad (PCBNEW (5.1.10-1-10_14)) date 2021-12-12 10:22:25*
|
||||
%MOMM*%
|
||||
%LPD*%
|
||||
G01*
|
||||
|
|
|
@ -1,12 +1,12 @@
|
|||
G04 #@! TF.GenerationSoftware,KiCad,Pcbnew,(5.1.10-1-10_14)*
|
||||
G04 #@! TF.CreationDate,2021-12-08T22:24:40-05:00*
|
||||
G04 #@! TF.CreationDate,2021-12-12T10:22:25-05:00*
|
||||
G04 #@! TF.ProjectId,ProDOS ROM-Drive 3.0,50726f44-4f53-4205-924f-4d2d44726976,3.0*
|
||||
G04 #@! TF.SameCoordinates,Original*
|
||||
G04 #@! TF.FileFunction,Soldermask,Top*
|
||||
G04 #@! TF.FilePolarity,Negative*
|
||||
%FSLAX46Y46*%
|
||||
G04 Gerber Fmt 4.6, Leading zero omitted, Abs format (unit mm)*
|
||||
G04 Created by KiCad (PCBNEW (5.1.10-1-10_14)) date 2021-12-08 22:24:40*
|
||||
G04 Created by KiCad (PCBNEW (5.1.10-1-10_14)) date 2021-12-12 10:22:25*
|
||||
%MOMM*%
|
||||
%LPD*%
|
||||
G01*
|
||||
|
|
|
@ -1,12 +1,12 @@
|
|||
G04 #@! TF.GenerationSoftware,KiCad,Pcbnew,(5.1.10-1-10_14)*
|
||||
G04 #@! TF.CreationDate,2021-12-08T22:24:40-05:00*
|
||||
G04 #@! TF.CreationDate,2021-12-12T10:22:25-05:00*
|
||||
G04 #@! TF.ProjectId,ProDOS ROM-Drive 3.0,50726f44-4f53-4205-924f-4d2d44726976,3.0*
|
||||
G04 #@! TF.SameCoordinates,Original*
|
||||
G04 #@! TF.FileFunction,Legend,Top*
|
||||
G04 #@! TF.FilePolarity,Positive*
|
||||
%FSLAX46Y46*%
|
||||
G04 Gerber Fmt 4.6, Leading zero omitted, Abs format (unit mm)*
|
||||
G04 Created by KiCad (PCBNEW (5.1.10-1-10_14)) date 2021-12-08 22:24:40*
|
||||
G04 Created by KiCad (PCBNEW (5.1.10-1-10_14)) date 2021-12-12 10:22:25*
|
||||
%MOMM*%
|
||||
%LPD*%
|
||||
G01*
|
||||
|
@ -1779,19 +1779,21 @@ X45997222Y-37883573D01*
|
|||
X46516108Y-37883573D02*
|
||||
X45525508Y-37883573D01*
|
||||
X45525508Y-37411859D01*
|
||||
X45525508Y-37128831D02*
|
||||
X45525508Y-36468431D01*
|
||||
X46516108Y-36892973D01*
|
||||
X45997222Y-35760859D02*
|
||||
X45997222Y-36091059D01*
|
||||
X46516108Y-36091059D02*
|
||||
X45525508Y-36091059D01*
|
||||
X45525508Y-35619345D01*
|
||||
X45997222Y-34911773D02*
|
||||
X45997222Y-35241973D01*
|
||||
X46516108Y-35241973D02*
|
||||
X45525508Y-35241973D01*
|
||||
X45525508Y-34770259D01*
|
||||
X45997222Y-36704288D02*
|
||||
X45997222Y-37034488D01*
|
||||
X46516108Y-37034488D02*
|
||||
X45525508Y-37034488D01*
|
||||
X45525508Y-36562773D01*
|
||||
X45997222Y-35855202D02*
|
||||
X45997222Y-36185402D01*
|
||||
X46516108Y-36185402D02*
|
||||
X45525508Y-36185402D01*
|
||||
X45525508Y-35713688D01*
|
||||
X45997222Y-35006116D02*
|
||||
X45997222Y-35336316D01*
|
||||
X46516108Y-35336316D02*
|
||||
X45525508Y-35336316D01*
|
||||
X45525508Y-34864602D01*
|
||||
X112741528Y-46189900D02*
|
||||
X112741528Y-46001214D01*
|
||||
X112788700Y-45906871D01*
|
||||
|
|
|
@ -1,7 +1,7 @@
|
|||
M48
|
||||
; DRILL file {KiCad (5.1.10-1-10_14)} date Wednesday, December 08, 2021 at 10:21:55 PM
|
||||
; DRILL file {KiCad (5.1.10-1-10_14)} date Sunday, December 12, 2021 at 10:22:21 AM
|
||||
; FORMAT={-:-/ absolute / inch / decimal}
|
||||
; #@! TF.CreationDate,2021-12-08T22:21:55-05:00
|
||||
; #@! TF.CreationDate,2021-12-12T10:22:21-05:00
|
||||
; #@! TF.GenerationSoftware,Kicad,Pcbnew,(5.1.10-1-10_14)
|
||||
; #@! TF.FileFunction,NonPlated,1,2,NPTH
|
||||
FMAT,2
|
||||
|
|
|
@ -1,7 +1,7 @@
|
|||
M48
|
||||
; DRILL file {KiCad (5.1.10-1-10_14)} date Wednesday, December 08, 2021 at 10:21:55 PM
|
||||
; DRILL file {KiCad (5.1.10-1-10_14)} date Sunday, December 12, 2021 at 10:22:21 AM
|
||||
; FORMAT={-:-/ absolute / inch / decimal}
|
||||
; #@! TF.CreationDate,2021-12-08T22:21:55-05:00
|
||||
; #@! TF.CreationDate,2021-12-12T10:22:21-05:00
|
||||
; #@! TF.GenerationSoftware,Kicad,Pcbnew,(5.1.10-1-10_14)
|
||||
; #@! TF.FileFunction,Plated,1,2,PTH
|
||||
FMAT,2
|
||||
|
|
|
@ -241,20 +241,20 @@
|
|||
(fp_text value 27C080 (at 7.62 40.43) (layer F.Fab)
|
||||
(effects (font (size 1 1) (thickness 0.15)))
|
||||
)
|
||||
(fp_line (start 1.255 -1.27) (end 14.985 -1.27) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start 14.985 -1.27) (end 14.985 39.37) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start 14.985 39.37) (end 0.255 39.37) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start 0.255 39.37) (end 0.255 -0.27) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start 0.255 -0.27) (end 1.255 -1.27) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start 6.62 -1.33) (end 1.16 -1.33) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start 1.16 -1.33) (end 1.16 39.43) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start 1.16 39.43) (end 14.08 39.43) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start 14.08 39.43) (end 14.08 -1.33) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start 14.08 -1.33) (end 8.62 -1.33) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start -1.05 -1.55) (end -1.05 39.65) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start -1.05 39.65) (end 16.3 39.65) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start 16.3 39.65) (end 16.3 -1.55) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start 16.3 -1.55) (end -1.05 -1.55) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start 16.3 39.65) (end 16.3 -1.55) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start -1.05 39.65) (end 16.3 39.65) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start -1.05 -1.55) (end -1.05 39.65) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start 14.08 -1.33) (end 8.62 -1.33) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start 14.08 39.43) (end 14.08 -1.33) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start 1.16 39.43) (end 14.08 39.43) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start 1.16 -1.33) (end 1.16 39.43) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start 6.62 -1.33) (end 1.16 -1.33) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start 0.255 -0.27) (end 1.255 -1.27) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start 0.255 39.37) (end 0.255 -0.27) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start 14.985 39.37) (end 0.255 39.37) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start 14.985 -1.27) (end 14.985 39.37) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start 1.255 -1.27) (end 14.985 -1.27) (layer F.Fab) (width 0.1))
|
||||
(fp_text user %R (at 7.62 19.05) (layer F.Fab)
|
||||
(effects (font (size 1 1) (thickness 0.15)))
|
||||
)
|
||||
|
@ -339,12 +339,12 @@
|
|||
(fp_text value "Apple II Expansion Slot" (at 9.652 -5.08) (layer F.Fab)
|
||||
(effects (font (size 1 1) (thickness 0.15)))
|
||||
)
|
||||
(fp_poly (pts (xy 48.895 8.89) (xy 48.895 1.27) (xy -15.875 1.27) (xy -15.875 8.89)) (layer B.Mask) (width 0.15))
|
||||
(fp_poly (pts (xy 48.895 8.89) (xy 48.895 1.27) (xy -15.875 1.27) (xy -15.875 8.89)) (layer F.Mask) (width 0.15))
|
||||
(fp_line (start -15.875 1.27) (end -16.51 1.27) (layer F.SilkS) (width 0.15))
|
||||
(fp_line (start -15.875 6.35) (end -15.875 1.27) (layer F.SilkS) (width 0.15))
|
||||
(fp_line (start 48.895 1.27) (end 49.53 1.27) (layer F.SilkS) (width 0.15))
|
||||
(fp_line (start 48.895 6.35) (end 48.895 1.27) (layer F.SilkS) (width 0.15))
|
||||
(fp_line (start 48.895 1.27) (end 49.53 1.27) (layer F.SilkS) (width 0.15))
|
||||
(fp_line (start -15.875 6.35) (end -15.875 1.27) (layer F.SilkS) (width 0.15))
|
||||
(fp_line (start -15.875 1.27) (end -16.51 1.27) (layer F.SilkS) (width 0.15))
|
||||
(fp_poly (pts (xy 48.895 8.89) (xy 48.895 1.27) (xy -15.875 1.27) (xy -15.875 8.89)) (layer F.Mask) (width 0.15))
|
||||
(fp_poly (pts (xy 48.895 8.89) (xy 48.895 1.27) (xy -15.875 1.27) (xy -15.875 8.89)) (layer B.Mask) (width 0.15))
|
||||
(fp_text user "7 A5" (at 1.905 0 45) (layer F.Fab)
|
||||
(effects (font (size 0.762 0.762) (thickness 0.127)))
|
||||
)
|
||||
|
@ -583,20 +583,20 @@
|
|||
(fp_text value 74LS374 (at 3.81 25.19) (layer F.Fab)
|
||||
(effects (font (size 1 1) (thickness 0.15)))
|
||||
)
|
||||
(fp_line (start 1.635 -1.27) (end 6.985 -1.27) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start 6.985 -1.27) (end 6.985 24.13) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start 6.985 24.13) (end 0.635 24.13) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start 0.635 24.13) (end 0.635 -0.27) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start 0.635 -0.27) (end 1.635 -1.27) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start 2.81 -1.33) (end 1.16 -1.33) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start 1.16 -1.33) (end 1.16 24.19) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start 1.16 24.19) (end 6.46 24.19) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start 6.46 24.19) (end 6.46 -1.33) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start 6.46 -1.33) (end 4.81 -1.33) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start -1.1 -1.55) (end -1.1 24.4) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start -1.1 24.4) (end 8.7 24.4) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start 8.7 24.4) (end 8.7 -1.55) (layer F.CrtYd) (width 0.05))
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(fp_line (start -0.25 -1) (end -0.25 1) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start -0.25 1) (end 2.75 1) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start 2.75 1) (end 2.75 -1) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start 2.75 -1) (end -0.25 -1) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start -0.37 -1.12) (end 2.87 -1.12) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start -0.37 1.12) (end 2.87 1.12) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start -0.37 -1.12) (end -0.37 -1.055) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start -0.37 1.055) (end -0.37 1.12) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start 2.87 -1.12) (end 2.87 -1.055) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start 2.87 1.055) (end 2.87 1.12) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start -1.05 -1.25) (end -1.05 1.25) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start -1.05 1.25) (end 3.55 1.25) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start 3.55 1.25) (end 3.55 -1.25) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start 3.55 -1.25) (end -1.05 -1.25) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start 3.55 1.25) (end 3.55 -1.25) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start -1.05 1.25) (end 3.55 1.25) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start -1.05 -1.25) (end -1.05 1.25) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start 2.87 1.055) (end 2.87 1.12) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start 2.87 -1.12) (end 2.87 -1.055) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start -0.37 1.055) (end -0.37 1.12) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start -0.37 -1.12) (end -0.37 -1.055) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start -0.37 1.12) (end 2.87 1.12) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start -0.37 -1.12) (end 2.87 -1.12) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start 2.75 -1) (end -0.25 -1) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start 2.75 1) (end 2.75 -1) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start -0.25 1) (end 2.75 1) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start -0.25 -1) (end -0.25 1) (layer F.Fab) (width 0.1))
|
||||
(fp_text user %R (at 1.25 0) (layer F.Fab)
|
||||
(effects (font (size 0.6 0.6) (thickness 0.09)))
|
||||
)
|
||||
|
@ -1325,20 +1325,20 @@
|
|||
(fp_text value 0.1µF (at 1.25 2.25) (layer F.Fab)
|
||||
(effects (font (size 1 1) (thickness 0.15)))
|
||||
)
|
||||
(fp_line (start 3.55 -1.25) (end -1.05 -1.25) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start 3.55 1.25) (end 3.55 -1.25) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start -1.05 1.25) (end 3.55 1.25) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start -1.05 -1.25) (end -1.05 1.25) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start 2.87 1.055) (end 2.87 1.12) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start 2.87 -1.12) (end 2.87 -1.055) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start -0.37 1.055) (end -0.37 1.12) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start -0.37 -1.12) (end -0.37 -1.055) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start -0.37 1.12) (end 2.87 1.12) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start -0.37 -1.12) (end 2.87 -1.12) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start 2.75 -1) (end -0.25 -1) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start 2.75 1) (end 2.75 -1) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start -0.25 1) (end 2.75 1) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start -0.25 -1) (end -0.25 1) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start -0.25 1) (end 2.75 1) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start 2.75 1) (end 2.75 -1) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start 2.75 -1) (end -0.25 -1) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start -0.37 -1.12) (end 2.87 -1.12) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start -0.37 1.12) (end 2.87 1.12) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start -0.37 -1.12) (end -0.37 -1.055) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start -0.37 1.055) (end -0.37 1.12) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start 2.87 -1.12) (end 2.87 -1.055) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start 2.87 1.055) (end 2.87 1.12) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start -1.05 -1.25) (end -1.05 1.25) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start -1.05 1.25) (end 3.55 1.25) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start 3.55 1.25) (end 3.55 -1.25) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start 3.55 -1.25) (end -1.05 -1.25) (layer F.CrtYd) (width 0.05))
|
||||
(fp_text user %R (at 1.25 0) (layer F.Fab)
|
||||
(effects (font (size 0.6 0.6) (thickness 0.09)))
|
||||
)
|
||||
|
@ -1364,20 +1364,20 @@
|
|||
(fp_text value 0.1µF (at 1.25 2.25) (layer F.Fab)
|
||||
(effects (font (size 1 1) (thickness 0.15)))
|
||||
)
|
||||
(fp_line (start -0.25 -1) (end -0.25 1) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start -0.25 1) (end 2.75 1) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start 2.75 1) (end 2.75 -1) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start 2.75 -1) (end -0.25 -1) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start -0.37 -1.12) (end 2.87 -1.12) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start -0.37 1.12) (end 2.87 1.12) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start -0.37 -1.12) (end -0.37 -1.055) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start -0.37 1.055) (end -0.37 1.12) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start 2.87 -1.12) (end 2.87 -1.055) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start 2.87 1.055) (end 2.87 1.12) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start -1.05 -1.25) (end -1.05 1.25) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start -1.05 1.25) (end 3.55 1.25) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start 3.55 1.25) (end 3.55 -1.25) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start 3.55 -1.25) (end -1.05 -1.25) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start 3.55 1.25) (end 3.55 -1.25) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start -1.05 1.25) (end 3.55 1.25) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start -1.05 -1.25) (end -1.05 1.25) (layer F.CrtYd) (width 0.05))
|
||||
(fp_line (start 2.87 1.055) (end 2.87 1.12) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start 2.87 -1.12) (end 2.87 -1.055) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start -0.37 1.055) (end -0.37 1.12) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start -0.37 -1.12) (end -0.37 -1.055) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start -0.37 1.12) (end 2.87 1.12) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start -0.37 -1.12) (end 2.87 -1.12) (layer F.SilkS) (width 0.12))
|
||||
(fp_line (start 2.75 -1) (end -0.25 -1) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start 2.75 1) (end 2.75 -1) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start -0.25 1) (end 2.75 1) (layer F.Fab) (width 0.1))
|
||||
(fp_line (start -0.25 -1) (end -0.25 1) (layer F.Fab) (width 0.1))
|
||||
(fp_text user %R (at 1.25 0) (layer F.Fab)
|
||||
(effects (font (size 0.6 0.6) (thickness 0.09)))
|
||||
)
|
||||
|
@ -1413,7 +1413,7 @@
|
|||
(gr_text "ProDOS ROM-Drive v3.0\n(c)1998-2021 Terence J. Boldt\nhttps://github.com/tjboldt/ProDOS-ROM-Drive" (at 71.3994 66.3702) (layer F.SilkS) (tstamp 5CB88057)
|
||||
(effects (font (size 0.9906 0.9906) (thickness 0.14986)) (justify left))
|
||||
)
|
||||
(gr_text "27C080 / 27C801 EPROM\nFirmware $00300 - $003FF\nDrive Image $00000 - $FF7FF" (at 44.43222 58.02884 90) (layer F.SilkS) (tstamp 5CB87F8D)
|
||||
(gr_text "27C080 / 27C801 EPROM\nFirmware $00300 - $003FF\nDrive Image $00000 - $FFFFF" (at 44.43222 58.02884 90) (layer F.SilkS) (tstamp 5CB87F8D)
|
||||
(effects (font (size 0.9906 0.9906) (thickness 0.14986)) (justify left))
|
||||
)
|
||||
(gr_text "OR Logic 74LS32" (at 113.284 39.751 90) (layer F.SilkS) (tstamp 5CB87EC8)
|
||||
|
|
12
README.md
12
README.md
|
@ -1,7 +1,10 @@
|
|||
# ProDOS ROM-Drive
|
||||
This is a peripheral card for the Apple ][ series computers that acts as a read-only solid state disk drive (SSD) all in EPROM. Although it won't run DOS, it is fully ProDOS compatible and will appear as a read-only hard drive even when booting from another drive. It holds 1022 KB of disk data and 2 KB of controlling code making a full megabyte. The drive boots ProDOS and into BASIC in under 1.5 seconds.
|
||||
# NOTE!
|
||||
This branch is untested and just here as a work in progress. Do NOT use. Use main branch instead.
|
||||
|
||||
![Image of Board](/Hardware/ProDOS%20ROM-Drive%202.5%20Front.jpg)
|
||||
# ProDOS ROM-Drive
|
||||
This is a peripheral card for the Apple ][ series computers that acts as a read-only solid state disk drive (SSD) all in EPROM. Although it won't run DOS, it is fully ProDOS compatible and will appear as a read-only hard drive even when booting from another drive. It holds 1024 KB of disk data with the 256 byte firmware stored in block 0001 where the SOS boot loader normally resides. The drive boots ProDOS and into BASIC in under 1.5 seconds.
|
||||
|
||||
![Image of Board](/Hardware/ProDOS%20ROM-Drive%203.0%20Front.jpg)
|
||||
|
||||
## History
|
||||
|
||||
|
@ -19,6 +22,9 @@ To build actual circuit boards, I tried making some by hand with marker, etching
|
|||
|
||||
In 2019, I decided to revisit the original design as I was disappointed that the original didn't have a solder mask and was rather large for what it was. I got the board much smaller but in the process of translating my two decade old hand written notes, I made a mistake on one control line. To actually call this project finished, I had to make another revision. I also noticed the revised board was slightly larger than a credit card so I worked for a couple weeks to optimize the lines and squeeze the two-layer board down to 3.375" x 2.125". The board here is that final revision 2.5 (note that references to first, second and third design are all the solderless breadboard prototypes leading up to the 1.0 circuit board printed in 1999, 2.0 was never made, 2.1 is the board with the error patched with a jumper wire and 2.2 through 2.4 were never made).
|
||||
|
||||
In 2021, the first and only issue was opened on the project requesting that the firmware be relocatable. I let that issue sit for a few months and then Ralle Palaveev supplied some relocatable firmware as a patch. I quickly realized that this could be placed into the second block on the drive normally reserved for SOS bootloader for the Apple ///, essentially allowing the full EPROM to be used for the drive. I disassembed Ralle's patch, merged it into the existing source
|
||||
code and made a few updates to save a few bytes and add clarity.
|
||||
|
||||
## Notes
|
||||
|
||||
The firmware code needs to be assembled 7 times with different parameters specifying which slot to assemble for. It is probably easier to work from the EPROM image as it is already a 1 MB disk image with the firmware in the top four ProDOS blocks.
|
||||
|
|
Loading…
Reference in New Issue