mirror of
https://github.com/Pecusx/jataricart.git
synced 2026-05-20 22:33:22 +02:00
Jakub Husak
89 lines
1.9 KiB
NASM
89 lines
1.9 KiB
NASM
TRIGGER_CHIPFORMAT_39SF equ $10
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TRIGGER_SECTORFORMAT_39SF equ $30
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C_FORMAT_39SF equ $80
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C_BYTE_PROG_39SF equ $a0
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M_SSIZE_39SF equ $10 ; sector size
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M_VECTORS_39SF
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jmp softid_entry_39SF
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jmp softid_exit_39SF
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jmp flash_formatchip_39SF
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jmp flash_formatsector_39SF
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jmp flash_writebytepreamble_39SF
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jmp flash_lockchip_39SF
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jmp flash_unlockchip_39SF
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jmp flash_wait_unit_39SF
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dta M_SSIZE_39SF
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dta c'39SF0x0',0
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flash_writebytepreamble_39SF
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lda #C_BYTE_PROG_39SF
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bne flashoppreamble_acc_39SF
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flash_formatsector_39SF
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lda #TRIGGER_SECTORFORMAT_39SF
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dta {bit.w} ; skip next 2 bytes
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; main entry
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; c set ->format (either chip or sector)
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; c cleared ->byte write
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flash_formatchip_39SF ; preserves X
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lda #TRIGGER_CHIPFORMAT_39SF
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sta flash_fmcommand_39SF
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lda #C_FORMAT_39SF ; only if c set
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; entry for command in A, mainly for sector format
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flashoppreamble_acc_39SF ; 39sf0x0, 29F040
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sta command_39SF
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stx flash_format_storex_39SF
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txa
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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 $d502,x
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mva #$aa $b555 ; $5555<$aa
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sta $d501,x
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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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mva command_39SF:#0 $b555; will become command: FORMAT/ID_MODE/BYTE_PROG
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cmp #C_FORMAT_39SF
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bne flash_format_39SF_exit ; if not FORMAT, procedure finishes
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; FORMAT part, more to write
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sta $d502,x
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mva #$aa $b555 ; $5555<$aa
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sta $d501,x
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mva #$55 $aaaa ; $2aaa<$55
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sta $d502,x
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lda flash_fmcommand_39SF:#TRIGGER_CHIPFORMAT_39SF
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cmp #TRIGGER_CHIPFORMAT_39SF
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sne
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sta $b555 ; $5555<$10
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flash_format_39SF_exit
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ldx flash_format_storex_39SF:#0
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sta $d500,x
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flash_lockchip_39SF
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flash_unlockchip_39SF
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flash_wait_unit_39SF
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rts
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;read_manufacturer_39SF
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; sta $D500,x ; x=0 or $40 else will read wrong
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; lda $a000
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; rts
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;read_product_39SF
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; sta $D500,x ; x=0 or $40 else will read wrong
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; lda $a001
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; rts
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softid_exit_39SF
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sta $D500,x ; x=0 or $40 else will read wrong
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lda #$f0
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sta $a000
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rts
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softid_entry_39SF
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lda #$90
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bne flashoppreamble_acc_39SF
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