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Byron Lathi
2023-08-15 23:06:10 -07:00
parent 68ff523b10
commit 906516c4b5
3 changed files with 169 additions and 176 deletions
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264
hw/efinix_fpga/init_hex.mem
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@@ -2,157 +2,157 @@
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20 8E FB 85 0A 86 0B E8 8E 31 92 AA E8 8E 30 92
20 E4 FC 20 8E FB 85 0C 86 0D A0 00 84 10 B1 0C
18 65 0A 91 0C C8 B1 0C 65 0B 91 0C CE 30 92 F0
11 A4 10 B1 08 C8 D0 02 E6 09 84 10 20 68 F0 4C
BC FD CE 31 92 D0 EA 60 85 08 86 09 A9 00 8D 2A
92 8D 2B 92 A0 01 B1 00 AA 88 B1 00 20 11 FD A0
02 A9 2A 91 00 C8 A9 92 91 00 A5 08 A6 09 20 C2
F7 AD 2A 92 AE 2B 92 60 A9 32 85 08 A9 92 85 09
A9 00 A8 A2 00 F0 0A 91 08 C8 D0 FB E6 09 CA D0
F6 C0 2C F0 05 91 08 C8 D0 F7 60 62 61 64 20 74
00 8A 2A 60 A0 01 B1 02 85 0B 88 B1 02 85 0A 4C
96 FB A9 01 4C 0F FD A0 00 B1 02 A4 02 F0 07 C6
02 A0 00 91 02 60 C6 03 C6 02 91 02 60 A9 00 A2
00 48 A5 02 38 E9 02 85 02 B0 02 C6 03 A0 01 8A
91 02 68 88 91 02 60 A0 00 91 02 C8 48 8A 91 02
68 60 85 0C 86 0D 20 E4 FC B1 0A D1 0C D0 0C AA
F0 10 C8 D0 F4 E6 0B E6 0D D0 EE B0 03 A2 FF 60
A2 01 60 85 0C 86 0D A2 00 A0 00 B1 0C F0 08 C8
D0 F9 E6 0D E8 D0 F4 98 60 85 0A 86 0B 85 0C 86
0D A0 00 B1 0A F0 14 20 37 FB 29 02 F0 06 B1 0A
69 20 91 0A C8 D0 EC E6 0B D0 E8 A5 0C A6 0D 60
20 8E FB 85 0C 86 0D E8 8E 31 92 AA E8 8E 30 92
20 E4 FC 20 8E FB 85 0E 86 0F A0 00 84 12 B1 0E
18 65 0C 91 0E C8 B1 0E 65 0D 91 0E CE 30 92 F0
11 A4 12 B1 0A C8 D0 02 E6 0B 84 12 20 68 F0 4C
BC FD CE 31 92 D0 EA 60 85 0A 86 0B A9 00 8D 2A
92 8D 2B 92 A0 01 B1 02 AA 88 B1 02 20 11 FD A0
02 A9 2A 91 02 C8 A9 92 91 02 A5 0A A6 0B 20 C2
F7 AD 2A 92 AE 2B 92 60 A9 32 85 0A A9 92 85 0B
A9 00 A8 A2 00 F0 0A 91 0A C8 D0 FB E6 0B CA D0
F6 C0 2C F0 05 91 0A C8 D0 F7 60 62 61 64 20 74
6F 6B 65 6E 3A 20 25 78 0D 0A 00 53 75 63 63 65
73 73 0D 0A 00 45 72 72 6F 72 0D 0A 00 53 74 61
72 74 0D 0A 00 6F 70 5F 63 6F 6E 64 20 65 72 72

2
hw/efinix_fpga/super6502.xml
View File

@@ -1,5 +1,5 @@
<?xml version="1.0" encoding="UTF-8"?>
<efx:project name="super6502" description="" last_change_date="Tue August 15 2023 19:01:15" location="/home/byron/Projects/super6502/hw/efinix_fpga" sw_version="2023.1.150" last_run_state="pass" last_run_tool="efx_pgm" last_run_flow="bitstream" config_result_in_sync="true" design_ood="sync" place_ood="sync" route_ood="sync" xmlns:efx="http://www.efinixinc.com/enf_proj" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.efinixinc.com/enf_proj enf_proj.xsd">
<efx:project name="super6502" description="" last_change_date="Tue August 15 2023 22:44:54" location="/home/byron/Projects/super6502/hw/efinix_fpga" sw_version="2023.1.150" last_run_state="pass" last_run_tool="efx_pgm" last_run_flow="bitstream" config_result_in_sync="true" design_ood="sync" place_ood="sync" route_ood="sync" xmlns:efx="http://www.efinixinc.com/enf_proj" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.efinixinc.com/enf_proj enf_proj.xsd">
<efx:device_info>
<efx:family name="Trion"/>
<efx:device name="T20F256"/>

79
sw/bios/bootloader.s
View File

@@ -21,6 +21,10 @@ buf = $8200
addrh = $0000
addrl = $0000
.zeropage
data_start: .res 2
.segment "BOOTSECTOR"
@@ -40,10 +44,6 @@ _main:
ldx #>str
jsr _cputs
lda #<_addr
ldx #>_addr
jsr pushax
lda fat_count
cmp #$2
jne @fail
@@ -57,7 +57,9 @@ _main:
adc reserved_sectors
bcc @a
inx
@a: jsr pushax
@a: sta data_start
stx data_start + 1
jsr pushax
stz sreg
stz sreg+1
jsr pusheax
@@ -67,76 +69,69 @@ _main:
lda #<ptr1
ldx #>ptr1
jsr _SD_readSingleBlock
lda #<buf
ldx #>buf
jsr _SD_printBuf
lda #$20
lda #$20 ; Start at first directory entry (first is a disk label)
sta ptr3
lda #$82
lda #>buf
sta ptr3 + 1
ldy #$0b
ldy #$0b ; look for attributes
@1: lda (ptr3),y
cmp #$0f
bne @2
clc
cmp #$0f ; if attribute is 0xf, this is a lfn
bne @2 ; if not an lfn, then try to read filename
clc ; otherwise, go to the next entry (+0x20)
lda ptr3
adc #$20
sta ptr3
bra @1
@2: ldy #11
@2: ldy #11 ; ignore the attributes. Write null to make a string
lda #$00
sta (ptr3),y
lda ptr3
lda ptr3 ; store address of the filename string on the stack
pha
ldx ptr3 + 1
phx
lda #<_boot2_str
lda #<_boot2_str ; load the string "BOOT2 BIN"
ldx #>_boot2_str
jsr pushax
plx
plx ; then push the string we read earlier
pla
jsr _strcmp
bne @fail
lda #<_good
bne @fail ; if they are not equal then fail
lda #<_good ; TODO: We should try the next entry
ldx #>_good
jsr _cputs
jsr _cputs ; otherwise continue on
ldy #$1b
ldy #$1b ; load the high byte of the low first cluster
lda (ptr3),y
tax
dey
lda (ptr3),y
lda (ptr3),y ; load the low byte of the low first cluster
sec
sbc #$02 ; don't handle carry, assume <256
; now a is the cluster num minus 2. We need to multiply this by
; 8 and add it to 0x77f0
; multiply by 8 is asl3
ldx #$77
asl
sbc #$02 ; don't handle carry, assume low byte is not 0 or 1
ldx data_start + 1 ; load x as high data start
asl ; multiply cluster num (minus 2) by 8
asl
asl
clc
adc #$f0
bcc @3
adc data_start ; add that to low data start
bcc @3 ; handle carry
inx
@3: pha
phx
lda #$00
sta sreg
lda #$00
sta sreg+1
plx
pla
@3: stz sreg
stz sreg+1
phx
pha
jsr pusheax
lda #<buf
ldx #>buf
@@ -145,10 +140,8 @@ _main:
ldx #>ptr1
jsr _SD_readSingleBlock
lda #$00
sta sreg
lda #$00
sta sreg+1
stz sreg
stz sreg+1
pla
plx
inc