From 1bdc9aeeaeddd7939522a160abae9331196ce547 Mon Sep 17 00:00:00 2001 From: Kevin O'Connor Date: Mon, 5 Sep 2016 13:38:26 -0400 Subject: kbd: Generate interrupt events for SysReq, PrtScr, and Break Generate the appropriate interrupt events for the given keys. Signed-off-by: Kevin O'Connor --- src/kbd.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++----- src/romlayout.S | 2 ++ 2 files changed, 52 insertions(+), 5 deletions(-) diff --git a/src/kbd.c b/src/kbd.c index b93d9d2..5945e99 100644 --- a/src/kbd.c +++ b/src/kbd.c @@ -392,6 +392,49 @@ kbd_set_flag(int key_release, u16 set_bit0, u8 set_bit1, u16 toggle_bit) SET_BDA(kbd_flag1, flags1); } +static void +kbd_ctrl_break(int key_release) +{ + if (!key_release) + return; + // Clear keyboard buffer and place 0x0000 in buffer + u16 buffer_start = GET_BDA(kbd_buf_start_offset); + SET_BDA(kbd_buf_head, buffer_start); + SET_BDA(kbd_buf_tail, buffer_start+2); + SET_FARVAR(SEG_BDA, *(u16*)(buffer_start+0), 0x0000); + // Set break flag + SET_BDA(break_flag, 0x80); + // Generate int 0x1b + struct bregs br; + memset(&br, 0, sizeof(br)); + br.flags = F_IF; + call16_int(0x1b, &br); +} + +static void +kbd_sysreq(int key_release) +{ + // SysReq generates int 0x15/0x85 + struct bregs br; + memset(&br, 0, sizeof(br)); + br.ah = 0x85; + br.al = key_release ? 0x01 : 0x00; + br.flags = F_IF; + call16_int(0x15, &br); +} + +static void +kbd_prtscr(int key_release) +{ + if (key_release) + return; + // PrtScr generates int 0x05 (ctrl-prtscr has keycode 0x7200?) + struct bregs br; + memset(&br, 0, sizeof(br)); + br.flags = F_IF; + call16_int(0x05, &br); +} + // Handle a ps2 style scancode read from the keyboard. static void __process_key(u8 scancode) @@ -463,21 +506,23 @@ __process_key(u8 scancode) return; case 0x46: /* Scroll Lock press */ case 0xc6: /* Scroll Lock release */ - if (flags1 & KF1_LAST_E0) - // XXX - Ctrl+Break should cause int 0x1B + if (flags1 & KF1_LAST_E0) { + kbd_ctrl_break(key_release); return; + } kbd_set_flag(key_release, KF0_SCROLL, 0, KF0_SCROLLACTIVE); return; case 0x37: case 0xb7: - if (flags1 & KF1_LAST_E0) - // XXX - PrtScr should cause int 0x05 (ctrl-prtscr keycode 0x7200?) + if (flags1 & KF1_LAST_E0) { + kbd_prtscr(key_release); return; + } break; case 0x54: case 0xd4: - // XXX - SysReq should cause int 0x15/0x85 + kbd_sysreq(key_release); return; case 0x53: if ((GET_BDA(kbd_flag0) & (KF0_CTRLACTIVE|KF0_ALTACTIVE)) diff --git a/src/romlayout.S b/src/romlayout.S index 53cc0f5..89b3784 100644 --- a/src/romlayout.S +++ b/src/romlayout.S @@ -171,12 +171,14 @@ __farcall16: .endm IRQ_TRAMPOLINE 02 + IRQ_TRAMPOLINE 05 IRQ_TRAMPOLINE 10 IRQ_TRAMPOLINE 13 IRQ_TRAMPOLINE 15 IRQ_TRAMPOLINE 16 IRQ_TRAMPOLINE 18 IRQ_TRAMPOLINE 19 + IRQ_TRAMPOLINE 1b IRQ_TRAMPOLINE 1c IRQ_TRAMPOLINE 4a -- cgit v1.1