blob: d509f7dcc700e13944c3bd230ffa6e488b9bc27c (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
|
; Interrupt Controller
PIC1 equ 0x20 ; IO base address for master PIC
PIC2 equ 0xA0 ; IO base address for slave PIC
PIC1_COMMAND equ PIC1
PIC1_DATA equ (PIC1+1)
PIC2_COMMAND equ PIC2
PIC2_DATA equ (PIC2+1)
ICW1_ICW4 equ 0x01 ; ICW4 (not) needed
ICW1_SINGLE equ 0x02 ; Single (cascade) mode
ICW1_INTERVAL4 equ 0x04 ; Call address interval 4 (8)
ICW1_LEVEL equ 0x08 ; Level triggered (edge) mode
ICW1_INIT equ 0x10 ; Initialization - required!
ICW4_8086 equ 0x01 ; 8086/88 (MCS-80/85) mode
ICW4_AUTO equ 0x02 ; Auto (normal) EOI
ICW4_BUF_SLAVE equ 0x08 ; Buffered mode/slave
ICW4_BUF_MASTER equ 0x0C ; Buffered mode/master
ICW4_SFNM equ 0x10 ; Special fully nested (not)
; Video
CONSOLE_W equ 80
CONSOLE_H equ 25
CONSOLE_SIZE equ CONSOLE_W * CONSOLE_H * 2
VIDEO_RAM equ 0xb8000
|
