md.inc

来自「Dos6.0」· INC 代码 · 共 383 行 · 第 1/2 页

LONGDELAY       EQU     18       ; 1000 msecs  = 1000/55.5 = 18 clock ticks.

;
; These are the values that are written into the divisor latch for the
;       various baud rates. They are obtained by dividing the clock rate
;       (1.8432 MHz) by 16x the desired baud rate.
;

DIV_50          EQU     900h
DIV_75          EQU     600h
DIV_110         EQU     417h
DIV_150         EQU     300h
DIV_300         EQU     180h
DIV_600         EQU     0C0h
DIV_1200        EQU     060h
DIV_1800        EQU     040h
DIV_2000        EQU     03Ah
DIV_2400        EQU     030h
DIV_3600        EQU     020h
DIV_4800        EQU     018h
DIV_7200        EQU     010h
DIV_9600        EQU     00Ch

;
;** Interrupt enable masks
;

IE_RX           EQU     00000001b       ; read data available
IE_TX           EQU     00000010b       ; transmit buffer empty
IE_LX           EQU     00000100b       ; line status change
IE_MX           EQU     00001000b       ; modem status change

;
;** Line control masks
;

LC_BMASK        EQU     00000011b       ; data bits mask
LC_BITS5        EQU     00000000b       ; 5 data bits
LC_BITS6        EQU     00000001b       ; 6 data bits
LC_BITS7        EQU     00000010b       ; 7 data bits
LC_BITS8        EQU     00000011b       ; 8 data bits

LC_SMASK        EQU     00000100b       ; stop bits mask
LC_STOP1        EQU     00000000b       ; 1 stop bit
LC_STOP2        EQU     00000100b       ; 2 stop bits (1.5 if 5 data bits)

LC_PMASK        EQU     00111000b       ; parity mask
LC_PNONE        EQU     00000000b       ; none parity
LC_PODD         EQU     00001000b       ; odd parity
LC_PEVEN        EQU     00011000b       ; even parity
LC_PMARK        EQU     00101000b       ; mark parity
LC_PSPACE       EQU     00111000b       ; space parity

LC_BREAK        EQU     01000000b       ; transmit break
LC_DLAB         EQU     10000000b       ; divisor latch access bit
LC_MASK         EQU     01111111b       ; documented line control register bits

;
;** Modem control register masks
;

MC_DTR          EQU     00000001b       ; data terminal ready
MC_RTS          EQU     00000010b       ; request to send
MC_OUT1         EQU     00000100b       ; output 1
MC_OUT2         EQU     00001000b       ; output 2
MC_LOOP         EQU     00010000b       ; loopback mode

;
;** Line status register masks
;

LS_DR           EQU     00000001b       ; data ready
LS_OERR         EQU     00000010b       ; overrun error
LS_PERR         EQU     00000100b       ; parity error
LS_FERR         EQU     00001000b       ; framing error
LS_BI           EQU     00010000b       ; break interrupt
LS_THRE         EQU     00100000b       ; TX holding register empty
LS_TSRE         EQU     01000000b       ; TX shift register empty

;
;** Modem status register definitions:
;

MS_DCTS         EQU     00000001b       ; delta clear to send
MS_DDSR         EQU     00000010b       ; delta data set ready
MS_TERI         EQU     00000100b       ; trailing edge of ring indicator
MS_DDCD         EQU     00001000b       ; delta receiver line signal detect
MS_CTS          EQU     00010000b       ; clear to send
MS_DSR          EQU     00100000b       ; data set ready
MS_RI           EQU     01000000b       ; ring indicator
MS_DCD          EQU     10000000b       ; receiver line signal detect

;************************************************************************
;               8 2 5 9 A  D E F I N I T I O N S                        *
;************************************************************************

MASTER_MASK_ADDR EQU     021h            ; Master's mask register addr.
SLAVE_MASK_ADDR  EQU     0A1h            ; Slave's mask register addr.
IRQS_PER_8259    EQU     8               ; # IRQs on each 8259A.
SELECT_IRR       EQU     0Ah             ; Selects int request register.
SELECT_ISR       EQU     0Bh             ; Selects in service register.

;****************************************************************
;               P S / 2   D E F I N I T I O N S                 *
;****************************************************************

PS2_IRQ         EQU     0Ch             ; Always IRQ 12 for PS/2 mouse.
PS2_IRQ_MASK    EQU     00010000b       ; Bit mask for IRQ 12.
PS2_PACKETSIZE  EQU     3               ; Bytes in a packet of data.

DX_SIGN         EQU     00010000b       ; Bit 4 is dx sign bit in status byte
DY_SIGN         EQU     00100000b       ; Bit 5 is dy sign bit in status byte

PS2_25PPI       EQU     0               ; Value to set resolution to 25 ppi.
PS2_50PPI       EQU     1               ; Value to set resolution to 50 ppi.
PS2_100PPI      EQU     2               ; Value to set resolution to 100 ppi.
PS2_200PPI      EQU     3               ; Value to set resolution to 200 ppi.


MCMD_RESET      EQU     0FFh            ; Reset mouse command
MCMD_RESEND     EQU     0FEh            ; Resend data to mouse
MCMD_DIAG_ERR   EQU     0FCh            ; Error on mouse diagnostics
MCMD_ACK        EQU     0FAh            ; Acknowledge
MCMD_DEFAULT    EQU     0F6h
MCMD_DISABLE    EQU     0F5h            ; Disable Mouse command
MCMD_ENABLE     EQU     0F4h            ; Enable Mouse command
MCMD_RATE       EQU     0F3h            ; Set sampling rate
MCMD_READ_TYPE  EQU     0F2h            ; Read device type
MCMD_REMOTE     EQU     0F0h            ; Set remote mode
MCMD_ECHO       EQU     0EEh            ; Set wrap mode
MCMD_KILL_ECHO  EQU     0ECh            ; reset wrap mode
MCMD_READDATA   EQU     0EBh            ; Read mouse data
MCMD_STREAM     EQU     0EAh            ; Set stream mode
MCMD_STATUS     EQU     0E9h            ; Status Request
MCMD_RESOLUTION EQU     0E8h            ; Set Resolution
MCMD_SCALE_2_1  EQU     0E7h            ; Set scaling 2 to 1
MCMD_SCALE_1_1  EQU     0E6h            ; Set scaling 1 to 1
MCMD_DIAG_OK    EQU     0AAh            ; Diagnostics ok
MCMD_DIAG_ID    EQU     000h            ; Diagnostic ID number

;
; The following codes are specific to the Microsoft PS/2 mouse
;

MCMD_MS_VERS    EQU     052h            ; Read current firmware version number
MCMD_MS_INPORT  EQU     056h            ; Read raw InPort data
MCDM_MS_DIAG    EQU     059h            ; enter MS diagnostices mode
MCMD_MS_READRAM EQU     05Bh            ; read ram byte

;****************************************************************
;               8 0 4 2  D E F I N I T I O N S                  *
;****************************************************************

;
; 8042 port definitions.
;

DATA_8042       EQU     60h             ; Port where data is sent to/from 8042.
CONTROL_8042    EQU     64h             ; Port where commands are sent to 8042.
STATUS_8042     EQU     64h             ; Port where status is read from 8042.
CRT_DATA_SEG	EQU	40H     	; ROM BIOS CRT Data Segment Address

;
; Status register bit definitions.
;

O_FULL          EQU     01h             ; 8042's output buffer is full.
I_FULL          EQU     02h             ; 8042's input buffer is full.
A_FULL          EQU     20h             ; 8042's aux output buffer is full.

;
; Command byte bit definitions.
;

AUX_DISABLED    EQU     20h             ; Auxiliary interface is disabled.
AUX_INT_ENABLE  EQU     02h             ; Auxiliary interrupts are enabled.

;
; 8042 commands.
;

CMD8042_READ_CMD EQU    020h            ; Read command byte.
CMD8042_WRITE_CMD EQU   060h            ; Write command byte.
CMD8042_DISABLE_AUX EQU 0A7h            ; Disable auxiliary interface.
CMD8042_ENABLE_AUX EQU  0A8h            ; Enable auxiliary interface.
CMD8042_TEST_AUX EQU    0A9h            ; Test auxiliary interface.
CMD8042_DISABLE_KBD EQU 0ADh            ; Disable keyboard.
CMD8042_ENABLE_KBD EQU  0AEh            ; Enable keyboard.
CMD8042_WRITE_AUX EQU   0D4h            ; Send data to auxiliary device.