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Restart kernel

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This commit is contained in:
Byron Lathi
2023-08-12 11:59:45 -07:00
parent 069ae5db4b
commit 7ad1079289
30 changed files with 98 additions and 1140 deletions
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14
sw/bios/bootloader.s
View File

@@ -15,6 +15,7 @@ buf = $8200
addrh = $0000
addrl = $0001
.segment "BOOTSECTOR"
_start:
@@ -51,9 +52,20 @@ _main:
ldx #>buf
jsr _SD_printBuf
lda #<_reserved_sect
ldx #>_reserved_sect
jsr pushax
lda $800E
ldx $800F
jsr pushax
ldy #$04
jsr _cprintf
@end: bra @end
_reserved_sect:
.asciiz "Reserved Sectors: %x\r\n"
str: .asciiz "Hello from the bootloader!\r\n"
_end:

3
sw/bios/link.ld
View File

@@ -1,7 +1,8 @@
MEMORY
{
ZP: start = $0, size = $100, type = rw, define = yes;
SDRAM: start = $200, size = $7e00, type = rw, define = yes;
KERNEL: start = $1000, size = $7000, type = rw, define = yes;
SDRAM: start = $9000, size = $5000, type = rw, define = yes;
BOOTLOADER: start = $8000, size = $1000, type = rw, define = yes, file = "bootloader.bin";
ROM: start = $F000, size = $1000, file = %O;
}