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back2root:ibm-pc-ms-dos:hardware:informations:bios_data_area [2023/01/21 23:13] – ↷ Liens modifiés en raison d'un déplacement. 5.255.231.107 | back2root:ibm-pc-ms-dos:hardware:informations:bios_data_area [2024/04/07 11:00] (Version actuelle) – ↷ Liens modifiés en raison d'un déplacement. 47.128.26.228 |
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| 40:0E | word | LPT4 port address (except PS/2)\\ Extended BIOS Data Area segment (PS/2, see [[back2root:ibm-pc-ms-dos:hardware:informations:edba|EBDA]]) | | | 40:0E | word | LPT4 port address (except PS/2)\\ Extended BIOS Data Area segment (PS/2, see [[back2root:ibm-pc-ms-dos:hardware:informations:edba|EBDA]]) | |
| **Equipement** ||| | | **Equipement** ||| |
| 40:10 | 2 bytes | Equipment list flags (see [[back2root:ibm-pc-ms-dos:interrupts:int_11|INT 11]] - [[#m_40_10|below]]) | | | 40:10 | 2 bytes | Equipment list flags (see [[back2root:ibm-pc-ms-dos:interrupts:int_11:start|INT 11]] - [[#m_40_10|below]]) | |
| 40:12 | byte | PCjr: infrared keyboard link error count | | | 40:12 | byte | PCjr: infrared keyboard link error count | |
| 40:13 | word | Memory size in Kbytes (see [[back2root:ibm-pc-ms-dos:interrupts:int_12|INT 12]]) | | | 40:13 | word | Memory size in Kbytes (see [[back2root:ibm-pc-ms-dos:interrupts:int_12:start|INT 12]]) | |
| 40:15 | byte | Reserved | | | 40:15 | byte | Reserved | |
| 40:16 | byte | PS/2 BIOS control flags | | | 40:16 | byte | PS/2 BIOS control flags | |
| 40:6C | dword | Daily timer counter, equal to zero at midnight;\\ incremented by [[back2root:ibm-pc-ms-dos:interrupts:int_08|INT 8]]; read/set by [[back2root:ibm-pc-ms-dos:interrupts:int_1a:start|INT 1A]] | | | 40:6C | dword | Daily timer counter, equal to zero at midnight;\\ incremented by [[back2root:ibm-pc-ms-dos:interrupts:int_08|INT 8]]; read/set by [[back2root:ibm-pc-ms-dos:interrupts:int_1a:start|INT 1A]] | |
| 40:70 | byte | Clock rollover flag, set when 40:6C exceeds 24hrs | | | 40:70 | byte | Clock rollover flag, set when 40:6C exceeds 24hrs | |
| 40:71 | byte | BIOS break flag, bit 7 is set if Ctrl-Break was *ever* hit; set by [[back2root:ibm-pc-ms-dos:interrupts:int_09|INT 9]] | | | 40:71 | byte | BIOS break flag, bit 7 is set if Ctrl-Break was *ever* hit; set by [[back2root:ibm-pc-ms-dos:interrupts:int_09:start|INT 9]] | |
| 40:72 | word | Soft reset flag via Ctl-Alt-Del or JMP FFFF:0 (see [[#m_40_72|below]]) | | | 40:72 | word | Soft reset flag via Ctl-Alt-Del or JMP FFFF:0 (see [[#m_40_72|below]]) | |
| 40:74 | byte | Status of last hard disk operation (see [[back2root:ibm-pc-ms-dos:interrupts:int_13_01|INT 13,1]]) | | | 40:74 | byte | Status of last hard disk operation (see [[back2root:ibm-pc-ms-dos:interrupts:int_13_01|INT 13,1]]) | |