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This commit is contained in:
Byron Lathi
2023-08-25 20:03:03 -07:00
parent 21b456067a
commit a971e7a717
3 changed files with 159 additions and 157 deletions
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50
sw/bios/boot2.s
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@@ -17,7 +17,8 @@ tbase: .res 2
tlen: .res 2
dbase: .res 2
dlen: .res 2
olen: .res 1
otype: .res 1
.segment "BOOTLOADER"
@@ -39,6 +40,7 @@ O65_BLEN = $12
O65_ZBASE = $14
O65_ZLEN = $16
O65_STACK = $18
O65_OPT_START = $1A
_start:
lda #<str
@@ -173,59 +175,57 @@ _start:
ldx #>filebuf
jsr _SD_printBuf
lda #<word_str
ldx #>word_str
jsr pushax
ldy #O65_TBASE
lda filebuf,y
sta tbase
iny
ldx filebuf,y
stx tbase + 1
jsr pushax
ldy #$4
jsr _cprintf
lda #<word_str
ldx #>word_str
jsr pushax
ldy #O65_TLEN
lda filebuf,y
sta tlen
iny
ldx filebuf,y
stx tlen + 1
jsr pushax
ldy #$4
jsr _cprintf
lda #<word_str
ldx #>word_str
jsr pushax
ldy #O65_DBASE
lda filebuf,y
sta dbase
iny
ldx filebuf,y
stx dbase + 1
jsr pushax
ldy #$4
jsr _cprintf
lda #<word_str
ldx #>word_str
jsr pushax
ldy #O65_DLEN
lda filebuf,y
sta dlen
iny
ldx filebuf,y
stx dlen + 1
ldy #O65_OPT_START
@opt_len:
lda #<opt_str
ldx #>opt_str
jsr pushax
ldy #$4
lda filebuf,y
beq @opt_end
sta olen
phy
jsr pusha0
ply
iny
lda filebuf,y
sta otype
phy
jsr pusha0
ply
ldy #$6
jsr _cprintf
@opt_end:
; do something
@end: bra @end
@@ -234,4 +234,6 @@ _start:
str: .asciiz "boot2\r\n"
kernel_str: .asciiz "KERNEL O65"
_good: .asciiz "Found KERNEL\r\n"
word_str: .asciiz "Word Value: %x\r\n"
word_str: .asciiz "Word Value: %x\r\n"
opt_str: .asciiz "Opt Len: %x, Opt Type: %x\r\n"