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From Evelyn, CPU unsupported message missing loading error msg address (pop si)

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KJD 2016-01-15 22:34:38 -05:00
parent 55fe761ebf
commit 618e682a3b
1 changed files with 4 additions and 2 deletions
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6
kernel/kernel.asm
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@ -222,7 +222,7 @@ cpu_abort:
mov ah, 0Fh mov ah, 0Fh
int 10h ; get video mode, bh = active page int 10h ; get video mode, bh = active page
call .first call .first ; print string that follows (address pushed by call)
%define LOADNAME "FreeDOS" %define LOADNAME "FreeDOS"
db 13,10 ; (to emit a blank line after the tracecodes) db 13,10 ; (to emit a blank line after the tracecodes)
@ -240,7 +240,9 @@ cpu_abort:
mov bl, 07h ; page in bh, bl = colour for some modes mov bl, 07h ; page in bh, bl = colour for some modes
int 10h ; write character (may change bp!) int 10h ; write character (may change bp!)
db 0A8h ; [test al,imm8] skip "pop si" [=imm8] after the first iteration
.first: .first:
pop si ; (first iteration only) get message address from stack
cs lodsb ; get character cs lodsb ; get character
test al, al ; zero ? test al, al ; zero ?
jnz .display ; no, display and get next character --> jnz .display ; no, display and get next character -->
@ -253,7 +255,7 @@ cpu_abort:
int 13h ; reset hard disks int 13h ; reset hard disks
; this "test ax, imm16" opcode is used to ; this "test ax, imm16" opcode is used to
db 0A9h ; skip "sti" \ "hlt" during first iteration db 0A9h ; skip "sti" \ "hlt" [=imm16] during first iteration
.wait: .wait:
sti sti
hlt ; idle while waiting for keystroke hlt ; idle while waiting for keystroke