Rename boot to bios, add sd call

Adds a call that you can make to the BIOS to read sd blocks. Useful for the bootloader where there is not much space
2022-04-18 20:24:29 -05:00
parent 64f6f0b397
commit 54328722ab
10 changed files with 72 additions and 9 deletions
--- a/sw/bios/boot.s
+++ b/sw/bios/boot.s
@@ -0,0 +1,14 @@
+.include "zeropage.inc"
+
+.segment "STARTUP"
+
+.export _init
+.import _load_bootsect
+
+_init:  ldx #$ff
+        txs
+        cld
+
+        jsr _load_bootsect
+        jmp $1000
+