give me some advice for hardware programming.

[lemonyii]

Hi again,
i think i have been at a point where i should go out of CPU,to program the hardwares.
I have set up local apic and its timer,and now i hope to start the outside interrupts,such as keyboard and harddisk.
then i want to try IOAPIC,and EHCI and so on.
and then file system,graphic,mouse. No further has considered so far.
But now i have a problem again:

add this in apic_init:

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apic_write(0x350ull, 0x7|INT_VECTOR_IRQ0);

then init 8259:

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extern i64 init_i8259(){
	outbyte(INT_M_CTL,	0x11);			// Master 8259, ICW1.
	outbyte(INT_S_CTL,	0x11);			// Slave  8259, ICW1.
	outbyte(INT_M_CTLMASK,	INT_VECTOR_IRQ0);	// Master 8259, ICW2. 设置 '主8259' 的中断入口地址
	outbyte(INT_S_CTLMASK,	INT_VECTOR_IRQ8);	// Slave  8259, ICW2. 设置 '从8259' 的中断入口地址
	outbyte(INT_M_CTLMASK,	0x4);			// Master 8259, ICW3. IR2 对应 '从8259'.
	outbyte(INT_S_CTLMASK,	0x2);			// Slave  8259, ICW3. 对应 '主8259' 的 IR2.
	outbyte(INT_M_CTLMASK,	0x1);			// Master 8259, ICW4.
	outbyte(INT_S_CTLMASK,	0x1);			// Slave  8259, ICW4.
	outbyte(INT_M_CTLMASK,	0x00);	// Master 8259, OCW1. 
	outbyte(INT_S_CTLMASK,	0xFF);	// Slave  8259, OCW1. 
	return 0;
}

set the keyboard to lights up:

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	while(inbyte(0x64)&0x2) inbyte(0x60);
	outbyte(0x64,0xAE);
	outbyte(0x64,0xD1);
	outbyte(0x60,0xED);
	outbyte(0x60,0x7);

but got a restart in bochs.the key debug info:(i deleted the things like "<bochs>s next at xxxx")

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(0) [0x00101a90] 0031:0000000000101a90 (unk. ctxt): mov esi, 0x000000ed       ;
beed000000
(0) [0x00101a95] 0031:0000000000101a95 (unk. ctxt): mov edi, 0x00000060       ;
bf60000000
(0) [0x00101a9a] 0031:0000000000101a9a (unk. ctxt): call .+0x0000000000000571 (
x0000000000102010) ; e871050000
(0) [0x00102010] 0031:0000000000102010 (unk. ctxt): push rdx                  ;
52
(0) [0x00102011] 0031:0000000000102011 (unk. ctxt): mov rdx, rdi              ;
4889fa
(0) [0x00102014] 0031:0000000000102014 (unk. ctxt): mov rax, rsi              ;
4889f0
(0) [0x00102017] 0031:0000000000102017 (unk. ctxt): out dx, al                ;
ee
(0) [0x00102018] 0031:0000000000102018 (unk. ctxt): pop rdx                   ;
5a
(0) [0x00102019] 0031:0000000000102019 (unk. ctxt): nop                       ;
90
(0) [0x0010201a] 0031:000000000010201a (unk. ctxt): nop                       ;
90
(0) [0x0010201b] 0031:000000000010201b (unk. ctxt): nop                       ;
90
(0) [0x0010201c] 0031:000000000010201c (unk. ctxt): nop                       ;
90
(0) [0x0010201d] 0031:000000000010201d (unk. ctxt): ret                       ;
c3
(0) [0x00000000] 0031:0000000000000000 (unk. ctxt): adc byte ptr ds:[rbx], cl ;
100b

notice the last ret ,it did not return to the address expected(and i check the stack,nothing wrong).
and that in bochs logfile is:

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00061894912i[CPU0 ] 0x0000000000000010>> (invalid)  : 60
00061894912e[CPU0 ] exception(): 3rd (14) exception with no resolution, shutdown status is 00h, resetting
00061894912i[SYS  ] bx_pc_system_c::Reset(HARDWARE) called
00061894912i[CPU0 ] cpu hardware reset

but if i set the keyboard like this:

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	while(inbyte(0x64)&0x2) inbyte(0x60);
	outbyte(0x64,0xAE);
	//outbyte(0x64,0xD1);
	//outbyte(0x60,0xED);
	//outbyte(0x60,0x7);

nothihg will happen,and no response on my hitting the keyboard.
so,how to get out my first step?say,how to enable the keyboard?
thx

[lemonyii]

and surely i set the IDT,and set the IF bit.

[Gigasoft]

You're setting the output port to 0xED. This disables the A20 gate. The 0xED should be sent to the keyboard, so don't issue command 0xD1.

Other things to check:
- Is bit 0 of the command register set?
- Is bit 4 of the command register clear?
- Has command 0xF4 been sent to the keyboard to enable it?
- Is the output register filled on keyboard and mouse input?
- Do other interrupts work? (For example, the timer channel 0 interrupt)
- Is an EOI sent in the interrupt handler?
- Are INT_VECTOR_IRQ0 and INT_VECTOR_IRQ8 multiples of 8?
- Is the keyboard ISR installed on the right IRQ (1)?

[lemonyii]

thank you at first!
a lot of problems.. and there is some point where i do not understand.

You're setting the output port to 0xED. This disables the A20 gate. The 0xED should be sent to the keyboard, so don't issue command 0xD1.

this is the way i saw from a book to set the lights on the keyboard,so how should i set them now?

- Are INT_VECTOR_IRQ0 and INT_VECTOR_IRQ8 multiples of 8?

really? never heard it before,thanks.

- Is the keyboard ISR installed on the right IRQ (1)?

what does this mean? the i8259?
i have many classes these two days,so i will try it once i am free.
thx

[Gigasoft]

Just write 0xED, then 0x07 to port 0x60, without writing 0xD1 to port 0x64.

what does this mean? the i8259?

Well, I mean, the keyboard service routine should be associated with IRQ vector 1 (entry number INT_VECTOR_IRQ0+1), if it isn't already.

[lemonyii]

Are INT_VECTOR_IRQ0 and INT_VECTOR_IRQ8 multiples of 8?

that's where i got a mistake! and now, everything is so smooth now.
thank you so much!