kernel.def

;	FUZIX mnemonics for memory addresses etc
;
;
;	The U_DATA address. If we are doing a normal build this is the start
;	of common memory. We do actually have a symbol for udata so
;	eventually this needs to go away
;
U_DATA__TOTALSIZE           .equ 0x200        ; 256+256 bytes @ F000
;
;	Space for the udata of a switched out process within the bank of
;	memory that it uses. Normally placed at the very top
;
U_DATA_STASH		    .equ 0x7E00	      ; 7E00-7FFF
;
;	Z80 systems start program space at 0, and load at 0x100 so that the
;	low 256 bytes are free for syscall vectors and the like, with some
;	also used as a special case by the CP/M emulator.
;
PROGBASE		    .equ 0x0000
PROGLOAD		    .equ 0x0100
;
;	CPU type
;	0 = CMOS Z80
;	1 = NMOS Z80 (also works with CMOS)
;	2 = Z180
;
;	If either NMOS or CMOS may be present pick NMOS as the NMOS build
;	contains extra code to work around an erratum n the NUMS Z80
;
Z80_TYPE		    .equ 1	      ; NMOS (IRQ bugs) Z80
;
;	For special platforms that have external memory protection hardware
;	Just say 0.
;
Z80_MMU_HOOKS		    .equ 0
;
;	Set this if the platform has swap enabled in config.h
;
CONFIG_SWAP		    .equ 1
;
;	The number of disk buffers. Must match config.h
;
NBUFS			    .equ 5
;
;	Configuration for the Zeta floppy controller. Specific to that
;	driver rather than generic.
;
; FDC9266 floppy controller ports
FDC_CCR		.equ	0	; No CCR
FDC_MSR		.equ	0x36	; 8272 Main Status Register (R/O)
FDC_DATA	.equ	0x37	; 8272 Data Port (R/W)
FDC_DOR		.equ	0x38	; Digital Output Register (W/O)

CPU_CLOCK_KHZ	.equ	8000	; 8MHz is usual top