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updated flashlib
This commit is contained in:
Kuba
+239
-111
@@ -1,78 +1,243 @@
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; flash eeprom library
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; by JHusak , 04.01.2020
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; free to use.
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lstore_x dta 0
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; x - 0x0 or 0x40 - chip select
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; c - 1 - format, 0 - write
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;.print flashcnt
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flashoppreamble
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; Nice to have procedures, because mads may exclude unused procedures (-x in cmdl)
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;.def STRIPPED
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;.def FLASH_INCLUDE_ALL
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;FLASH_TYPE equ M_TYPE_28SF
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;FLASH_TYPE equ M_TYPE_29SF
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FLASH_TYPE equ M_TYPE_39SF
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;FLASH_TYPE equ M_TYPE_29F
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; x - 0x0 or 0x40 - chip select;
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; a - $80 - format, $90 - enter id mode, $a0 - writebyte
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C_ID_MODE equ $90
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M_TYPE_28SF equ $88
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M_TYPE_29SF equ $89
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M_TYPE_39SF equ $99
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M_TYPE_29F equ $09 ; used in MaxFlash BM29F040
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M_SSIZE_28SF equ $0100 ; sector size
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M_SSIZE_29SF equ $0080 ; sector size
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M_SSIZE_39SF equ $1000 ; sector size
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M_SSIZE_29F equ $10000 ; sector size; MAXFlash, protocol compatible with 39sf0x0
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;Problems with writing:
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; - check flash presence
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; - flash protocol
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; - size of flash 1,2
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; - size of sector in some cases
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; - number of flashes (easy, they do not overlap)
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; All can be read by erasing memory, writing several bytes and reading them
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; For flash recognition
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; - format,
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; - write 128 kbytes, read more -> if not ff, flash is 128k
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; - write additional 128KB, read more ->if not ff flash is 256kB, else is 512kb
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;
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; First detection is to read raw memory and id and compare results. Some issues may occur when no memory inserted.
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;flash_detect_protocol:
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; lda #ID_MODE
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; jsr flashoppreamble_5555_2aaa
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; c parameter as format/writebyte
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; for compatibility, 5555_2aaa only
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.IF (FLASH_TYPE = M_TYPE_39SF) .or .def FLASH_INCLUDE_ALL
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TRIGGER_FORMAT equ $10
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C_FORMAT equ $80
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C_BYTE_PROG equ $a0
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flashoppreamble
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pha
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txa
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lda #C_BYTE_PROG
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scc
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lda #C_FORMAT ; only if c set
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sta command
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pla
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jmp @+
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flashoppreamble_acc ; 39sf0x0, 29F040
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sta command
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@ txa
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pha
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; when write byte x must be set to either 0 or 40 temporarily
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and #$40
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tax
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; $5555<$aa
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@ sta $d502,x
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lda #$aa
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sta $b555
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; $2aaa<$55
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sta $d502,x
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mva #$aa $b555 ; $5555<$aa
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sta $d501,x
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lda #$55
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sta $aaaa
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mva #$55 $aaaa ; $2aaa<$55
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; $5555<$80
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sta $d502,x
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; sector format: carry set
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scc
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lda #$80 ; sector erase
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scs
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lda #$a0 ; byte programm
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sta $b555
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bcc @+
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; $5555<$aa
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command equ *+1
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mva #$ff $b555; will become command: FORMAT/ID_MODE/BYTE_PROG
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cmp #C_FORMAT
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bne @+ ; if not FORMAT, procedure finishes
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; FORMAT part, more to write
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sta $d502,x
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lda #$aa
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sta $b555
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; $2aaa<$55
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mva #$aa $b555 ; $5555<$aa
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sta $d501,x
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lda #$55
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sta $aaaa
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; PREPARE FOR SECTOR TO ERASE
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; set upper bank bits
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mva #$55 $aaaa ; $2aaa<$55
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@ pla
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tax
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pla
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rts
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.endif
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.if (FLASH_TYPE=M_TYPE_29SF) .or .def FLASH_INCLUDE_ALL
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TRIGGER_FORMAT equ $10
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C_FORMAT equ $80
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C_BYTE_PROG equ $a0
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flashoppreamble
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pha
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lda #C_BYTE_PROG
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scc
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lda #C_FORMAT ; only if c set
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sta command
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pla
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jmp @+
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flashoppreamble_acc ; 29sf040
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sta command
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@ txa
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pha
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; when write byte x must be set to either 0 or 40 temporarily
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and #$40
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tax
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sta $d500,x
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mva #$aa $a555 ; $555<$aa
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mva #$55 $a2aa ; $2aa<$55
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; $555<command
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command equ *+1
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mva #$ff $a555; will become command: FORMAT/ID_MODE/BYTE_PROG
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cmp #C_FORMAT
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bne @+ ; if not FORMAT, procedure finishes
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; FORMAT part, more to write
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mva #$aa $a555 ; $555<$aa
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mva #$55 $a2aa ; $2aa<$55
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; PREPARE FOR SECTOR TO ERASE
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@ pla
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tax
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rts
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.endif
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.if (FLASH_TYPE=M_TYPE_28SF) .or .def FLASH_INCLUDE_ALL
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TRIGGER_FORMAT equ $30
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C_FORMAT equ $30
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C_BYTE_PROG equ $10
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flashoppreamble
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pha
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lda #C_BYTE_PROG
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scc
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lda #C_FORMAT ; only if c set
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flashoppreamble_acc ; 28SF0x0
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sta $d500,x ; can be any address
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sta $a000; command: FORMAT/ID_MODE/BYTE_PROG, any address
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rts
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.endif
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.if FLASH_TYPE=M_TYPE_28SF
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flash_unlockchip
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sta $D500,x
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; read from 1823H, 1820H, 1822H, 0418H, 041BH, 0419H, 041AH
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lda $B823
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lda $B820
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lda $B822
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lda $A418
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lda $A41B
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lda $A419
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lda $A41A
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rts
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.endif
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.if (FLASH_TYPE=M_TYPE_29SF) .or (FLASH_TYPE=M_TYPE_39SF)
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flash_unlockchip
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rts
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.endif
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.ifndef STRIPPED
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; flash size only needed in not stripped version for format result check.
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flash_size dta 0
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; as well as check_vendor procedure
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;
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; --------------------------
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; PROCEDURE
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; x = 0 or 0x40 - flash chip address.
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store_x dta 0
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; returns c set -> failed
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; if c cleared, x=vendor, y=product code
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; there are some memories which need multiple read, but we do not abuse them.
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check_vendor
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lda #C_ID_MODE
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jsr flashoppreamble_acc
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ldx $a000 ; vendor
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ldy $a001 ; id
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mva #$f0 $a000 ; exit read_id
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mva #0 flash_size
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cpx #$BF; SST
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bne next1
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; nice to store that this is SST
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cpy #$B5
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bne @+
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lda #$0f
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@ cpy #$B6
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bne @+
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lda #$1f
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@ cpy #$B7
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bne @+
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lda #$3f
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@ sta flash_size
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clc
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rts
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next1
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.if 0
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lda #C_ID_MODE
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jsr flashoppreamble_acc
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ldx $a000 ; vendor
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ldy $a001 ; id
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mva #$f0 $a000 ; exit read_id
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mva #0 flash_size
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cpx #$BF; SST
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bne cvexit
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; nice to store that this is SST
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cpy #$24
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bne @+
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lda #$1f
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@ cpy #$13
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bne @+
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lda #$3f
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@ sta flash_size
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clc
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rts
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.endif
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cvexit
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sec
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rts
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.endif
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; --------------------------
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flashformatchip2
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ldx #$40
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dta { bit.w }
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flashformatchip1
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ldx #$0
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; --------------------------
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; PROCEDURE
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; x = 0 or 0x40 - flash chip address.
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flashformatchip
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sei
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stx store_x
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sec ; format preamble
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jsr flashoppreamble ; does not touch A
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lda #C_FORMAT
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jsr flashoppreamble_acc ; does not touch A
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sta $d502,x
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lda #$10
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sta $b555
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lda #$ff
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sta flashcmp
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jsr flashcheckresult
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beq @+
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; cart is off and cli
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; sec ; error
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; rts
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@ lda #$3f
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lda #TRIGGER_FORMAT
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sta $b555 ; FORMAT HERE TRIGGERED!
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; not needed to mva $ff flashcmp
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jsr wait4flashcheckresult ; waits for format finished
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; then check number of banks for FFs
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lda #$3f ; this depends on flash size, $0f, $1f, $3f
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sta flashformatcounter
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@ sei
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flashbankloop sei
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ldx store_x
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flashformatcounter equ*+1
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sta $d5FF,x ; set chip (x) and bank
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@@ -83,16 +248,16 @@ flashformatcounter equ*+1
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sta flashformataddrcheck + 2
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; check whole sector against 0xff
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jsr flashchecksectorformatted_bare ; destroys x
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bcs @+ ; format error
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bcs flashformatexit ; format error if c set
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dec flashformatcounter
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bpl @-
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@ jmp flashcartoff ; preserves C
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bpl flashbankloop
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flashformatexit jmp flashcartoff ; preserves C
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store_x dta 0
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; --------------------------
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; PROCEDURE
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flashformatsector
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; x - even sector 00 - 7f
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; x - bank number 00 - 7f (even sector>>1)
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; a - erase 4KB from $B000 if A=$B0, FROM $A000 IF A=$A0
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; format 4kb evensector
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; strange form - easily maps to cartridge banks
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@@ -103,27 +268,28 @@ flashformatsector
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sta flashformatstorea
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sei
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sta $d500,x
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; store #$a0 or #$b0
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sta flashformataddrcheck + 2
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jsr flashchecksectorformatted
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bcc flashsectorformatgood
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sei
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flashformatstorex equ * + 1
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ldx #0 ; filled before
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flashformatstorea equ * + 1
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lda #0 ; filled before
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; check least sector bit
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sec ; format preamble
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jsr flashoppreamble ; does not touch A,X
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lda #C_FORMAT
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jsr flashoppreamble_acc ; does not touch A,X
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sta $D500,x
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; A must be either $A0 or $B0
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flashformatstorea equ * + 1
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lda #0 ; filled before
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sta flashtmpaddr+1
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sta flashformataddrcheck + 2
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lda #$30
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flashtmpaddr equ *+1
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sta $a000 ; Format!
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jsr flashcheckresult
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sta $a000 ; SECTOR FORMAT INVOKED HERE!
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jsr wait4flashcheckresult ;
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sei
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lda flashformatstorea
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@@ -171,28 +337,26 @@ flashwritebyte
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sta $D500,x ; select bank, chip
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ldy #{ cmp.w }
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jsr flashprocessbyte
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bne @+
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;clc
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;jmp flashcartoff
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bne byte_differs
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sta $D580
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cli
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clc
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rts
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@ sta flashcmp
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byte_differs
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sta flashcmp
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sei
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clc ; write byte preamble
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jsr flashoppreamble ; preserves A,X
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pha
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lda #C_BYTE_PROG
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jsr flashoppreamble_acc ; preserves A,X
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pla
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; set right bank
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sta $D500,x
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ldy #{ sta.w }
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; WRITE BYTE !
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jsr flashprocessbyte
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jsr flashprocessbyte ; WRITE BYTE INVOKED !
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flashcheckresult ; sei mode
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wait4flashcheckresult ; sei mode
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mva #0 flashcnt
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ldy #5 ; first time wait short first turn to speed up byte write.
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ldy #1 ; first time wait short first turn to speed up byte write.
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bne @+
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flashwaitfordone
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@@ -213,23 +377,23 @@ flashwaitfordone
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@ ldy #{ lda.w }
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jsr flashprocessbyte
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sta flashval
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ldy #{ eor.w }
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jsr flashprocessbyte
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inc flashcnt
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bne @+
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jsr flashcartoff
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sta $d580
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lda #$ff ; status
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rts
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@
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and #$40
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bne flashwaitfordone
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; in acc will be mismatched byte
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ldy #{ lda.w }
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jsr flashprocessbyte
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jsr flashcartoff ; preserves axy, not p
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sta $d580
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flashval equ *+1
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lda #0
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flashcmp equ *+1
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cmp #0
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; when non zero = error
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; when byte compare non zero = error
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rts
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flashcnt
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@@ -265,39 +429,3 @@ flashcartoff
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pla
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rts
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; PROCEDURE
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; Y-char to write
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PRINTWHAT
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php
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pha
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txa
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pha
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tya
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pha
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jsr $f2b0
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pla
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tay
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pla
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tax
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pla
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plp
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rts
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PRINTDOT
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php
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pha
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txa
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pha
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tya
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pha
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lda #'.'
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jsr $f2b0
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pla
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tay
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pla
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tax
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pla
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plp
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rts
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; ----------------------- IINT
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; org $2e2
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; dta a($600)
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