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| author | Richard Qin <richard.qin.x@gmail.com> | 2026-11-09 03:22:35 +0800 |
|---|---|---|
| committer | Richard Qin <richard.qin.x@gmail.com> | 2026-11-09 03:22:35 +0800 |
| commit | 06cb46aa0236352554f23697e17bed378083be1a (patch) | |
| tree | 099e92dce130d8f3b2bdbe9c88ddc3949babe94c /mubios/core/bda.c | |
| parent | a54a4236a27e8319da421010fe0c3c5d80edca45 (diff) | |
| download | rcc-project-06cb46aa0236352554f23697e17bed378083be1a.tar.gz rcc-project-06cb46aa0236352554f23697e17bed378083be1a.tar.xz | |
[mubios] Initialize VGA mode and serial BIOS services
Diffstat (limited to 'mubios/core/bda.c')
| -rw-r--r-- | mubios/core/bda.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/mubios/core/bda.c b/mubios/core/bda.c index 4de2243..5aad85c 100644 --- a/mubios/core/bda.c +++ b/mubios/core/bda.c @@ -23,6 +23,9 @@ extern u8 __ebda_start[]; +#define BDA_COM1_OFFSET 0x0000u +#define BDA_LPT1_OFFSET 0x0008u + static void store_u16 (volatile u8 *address, u16 value) { @@ -41,7 +44,10 @@ bda_init (void) store_u16 (bda + BDA_EBDA_SEGMENT_OFFSET, (u16)(ebda_base >> 4)); - store_u16 (bda + BDA_EQUIPMENT_OFFSET, (u16)(ebda_base >> 4)); + store_u16 (bda + BDA_EQUIPMENT_OFFSET, 0x4227u); + + store_u16 (bda + BDA_COM1_OFFSET, 0x03F8u); + store_u16 (bda + BDA_LPT1_OFFSET, 0x0378u); store_u16 (bda + BDA_CONVENTIONAL_MEMORY_OFFSET, (u16)(ebda_base >> 10)); @@ -62,6 +68,7 @@ extern void irq7_entry (void); extern void int1a_entry (void); extern void int10_entry (void); +extern void int14_entry (void); extern void int13_entry (void); extern void int15_entry (void); extern void int16_entry (void); @@ -89,6 +96,7 @@ ivt_init (void) install_ivt_entry (0x0Fu, irq7_entry); install_ivt_entry (0x1Au, int1a_entry); install_ivt_entry (0x10u, int10_entry); + install_ivt_entry (0x14u, int14_entry); install_ivt_entry (0x13u, int13_entry); install_ivt_entry (0x15u, int15_entry); install_ivt_entry (0x16u, int16_entry); |