head	1.1;
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comment	@# @;


1.1
date	2007.03.28.21.22.07;	author toni32;	state Exp;
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commitid	3555460adc664567;


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1.1
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@Hint:

Address from the code side (if you want to know physical address >> 2)
Bit ordering:  0=MSB --> 31=LSB

I/O PORTS 
-------------------------------------------------------------------------------------
ADDRESS			READ				WRITE
-------------------------------------------------------------------------------------
SP3SK GPIO: **ATTENTION** USE ALWAYS WORD (32BIT) WRITE DUE TO NOT BYTE SELECT LOGIC
0x0800_0000		31..24=segments_n		31..24=segments_n
0x0800_0001(r)		23..20=drivers_n		23..20=drivers_n
0x0800_0002(r)		19..16=pushbuttons
0x0800_0003(r)		15.. 8=leds			15..8 =leds
			 7.. 0=switches

UARTS STATUS REGISTER:
0x0800_0004		24=rx1_data_present
			25=rx1_half_full
			26=rx1_full
			27=tx1_half_full
			28=tx1_full

0x0800_0006		 8=rx2_data_present
			 9=rx2_half_full
			10=rx2_full
			11=tx2_half_full
			12=tx2_full

UART1_TXRX_DATA:
0x0800_0008		31..24=read byte		31..24=send byte

UART2_TXRX_DATA:
0x0800_000C		31..24=read byte		31..24=send byte

PROM_READER:
0x0800_0010		31..24=read current byte
0x0800_0011		23=requested sync		23=request next sync
			22=requested data		22=request next byte
			21=prom synced
			20=data ready

TIMER1:
0x0800_0014		31=running/stopped		31=start/stop
			30..0=current value		30..0=max. timer value

INTERRUPT_ENABLE:
0x0800_0018						31=enable timer1 interrupt
							30=enable uart1 receive byte interrupt
							29=enable uart2 receive byte interrupt

-------------------------------------------------
MEMORY MAP
-------------------------------------------------
0x0000_0000	block ram start (inside fpga)
0x0000_1fff	block ram end

0x0000_0000	reset vector
0x0000_0008	software exception vector (break)
0x0000_0010	interrupt vector
0x0000_0018	reserved (breakpoint vector)
0x0000_0020	hardware exception vector

0x0400_0000	external sram start
0x040f_ffff	external sram end

0x040e_2000	video ram start (inside external sram)
0x040f_ffff	video ram end (size = 0x1_e000)

0x0800_0000	i/o space
0x0800_xxxx

@