suzanne.soy/os-test-framework
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Made the os.sh a chameleon: it is now an x86 bootsector and a shell script at the same time.

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This commit is contained in:
Georges Dupéron 2018-07-03 17:20:24 +02:00
parent 4edc0a7177
commit 64971229f3
1 changed files with 11 additions and 0 deletions
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11
example-os/os.asm
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@ -1,6 +1,11 @@
[BITS 16] [BITS 16]
[ORG 0x7c00] [ORG 0x7c00]
db `#!/usr/bin/env sh\n`
db `: <<'EOF'\n`
times 0x7c78-0x7c00-($-$$) db 0
;; Switch to 320x200x256 VGA mode ;; Switch to 320x200x256 VGA mode
mov ax, 0x0013 mov ax, 0x0013
int 10h int 10h
@ -41,5 +46,11 @@ times 512-2-($-$$) db 0
db 0x55 db 0x55
db 0xaa db 0xaa
;; end of the bootsector, close the sh here-document skipped via : <<'EOF'
db `\n`
db `EOF\n`
db `echo Hello world from sh!\n`
db `exit\n`
;; Fill up to 1.44M with 0 ;; Fill up to 1.44M with 0
times (1440*1024)-($-$$) db 0 times (1440*1024)-($-$$) db 0