; Configuration, hardware definition, ...
;
; Copyright (C) 2010 Sprite_tm
; Copyright (C) 2010,2012,2013 Leo C.
;
; This file is part of avrcpm.
;
; avrcpm is free software: you can redistribute it and/or modify it
; under the terms of the GNU General Public License as published by
; the Free Software Foundation, either version 3 of the License, or
; (at your option) any later version.
;
; avrcpm is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
; GNU General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with avrcpm. If not, see .
;
; $Id: config.inc 242 2015-12-11 16:05:52Z rapid $
;-----------------------------------------------------------------------
;
; Hardware and feature configuration
;
; Supported MCUs are: atmega328P atmega168 atmega88 atmega8
; Z80 emulation currently needs atmega328P, so this is the default.
;#define atmega328p
; MCU frequency in Hz.
;#define F_CPU 20000000
; Set this to 0, if you have a (one) DRAM chip whith 4 Bit data bus.
;#define DRAM_8BIT 1
; Baudrate of serial port (console).
;#define BAUD 115200
; I2C_SUPPORT defaults to 1 on 8-bit-ram systems and must be 0 on 4-bit-ram systems.
; Set this do 0, if you don't have I2C peripherals and want to save some flash
; or use the I2C pins for other purposes.
;#define I2C_SUPPORT
; Support for the SC16IS740 I2C UART chip is included automatically, when
; I2C support is enabled. Uncomment and set to 0 if you don't want support for
; the SC16IS740 I2C UART chip.
;#define I2C_UART_SUPPORT 1
; Emulate Z80 cpu if 1, 8080 otherwise.
;
;#define EM_Z80 1
; Uncomment and set RAMDISKCOUNT to 1-4 if you want to test the experimental and
; unsupported ramdisk feature . Number depends on actual ram size (256kx4 - 4Mx8)
; and bios dpb/dph definitions.
;#define RAMDISKCNT 0
; Uncomment and set to 0, if you need to save flash (ie. ATmega88).
;#define FAT16_SUPPORT 1
; Uncomment and set to 0, if you don't want to use CP/M partitions.
; (Saves some bytes.)
;#define CPMDSK_SUPPORT 1
; Uncomment and set to 0, if you need to save flash.
;#define MMCBOOTLOADER 1
;-----------------------------------------------------------------------
;Debugging aids
.equ BOOTWAIT = 1
.equ MEMTEST = 1
.equ MEMFILL = 1 /* Fill DRAM */
.equ SRAM_FILL = 1 /* Fill unused SRAM */
.equ MMC_DEBUG = 0 /* Increase for more debugging */
.equ MMC_DEBUG_RDW = 0
.equ DSKSEL_DEBUG = 0
.equ DISK_DEBUG = 0 /* 1 = BOOT/HOME debug, 2 = +R/W debug */
.equ HOSTRW_DEBUG = 0
.equ FAT16_DEBUG = 0
.equ FAT16_DBG_FAT = 0
.equ HEAP_DEBUG = 0
.equ PORT_DEBUG = 0
.equ INS_DEBUG = 0
.equ STACK_DBG = 0
.equ PRINT_PC = 0
.equ TIMER_DEBUG = 0
.equ I2C_STATE_DEBUG = 0
.equ MEMDUMP_DEBUG = 1
;-----------------------------------------------------------------------
; Z80/8080 Virtual Ports
#define UARTDR 1 /* UART Data Register */
#define UARTCSR 3 /* UART Control/Status Register */
#define UARTRXRDY 0x01 /* RxReady Status Bit Mask */
#define UARTTXRDY 0x02 /* TxReady Status Bit Mask */
#define READ_FUNC 7
#define WRITE_FUNC 6
#define BOOT_FUNC 5
#define HOME_FUNC 4
#define TIMERPORT 0x40 /* Base z80 port address for clock access */
#define TIMER_CTL TIMERPORT
#define TIMER_MSECS TIMERPORT+1
#define TIMER_SECS TIMER_MSECS+2
#define CLOCKPORT TIMERPORT+7 /* Real time clock BCD (ss,mm,hh,DD,MM,YYYY) */
#define starttimercmd 1
#define quitTimerCmd 2
#define printTimerCmd 15
#define uptimeCmd 16
#define MEMDUMPPORT 0x09
#define DEBUGPORT 0x4F
#define startTraceCmd 0x01 /* 'OUT (DEBUGPORT),startTraceCmd' starts tracing */
#define stopTraceCmd 0x00
#define PrintStackCmd 0x02
; Virtual I2C Interface
#define I2CSTAT 0x05
#define I2CCTRL 0x05
#define I2CBLEN 0x06
#define I2CADR 0x07
#define I2CADRL 0x07
#define I2CADRH 0x08
; ISC16IS740 UART
#define I2C_UART 0x50 /* ISC16IS740 base port */
; Port-Expander PCF8574
#define PORT 0x80
#define PORT0 0x80
#define PORT1 0x81
#define PORT2 0x82
#define PORT3 0x83
#define PORT4 0x84
#define PORT5 0x85
#define PORT6 0x86
#define PORT7 0x87
;-----------------------------------------------------------------------
;
#define IPLADDR 0x2000 /* Bootloader load address */
#define DRAM_WAITSTATES 1 /* Number of additional clock cycles for dram read access */
#define REFR_RATE 64000 /* dram refresh rate in cycles/s. */
/* Most drams need 1/15.6µs. */
#define RXBUFSIZE 128 /* USART recieve buffer size. Must be power of 2 */
.if SRAM_SIZE > 1024
.equ TXBUFSIZE = 128 /* USART transmit buffer size. Must be power of 2 */
.else
.equ TXBUFSIZE = 32 /* USART transmit buffer size. Must be power of 2 */
.endif
.if SRAM_SIZE > 1024
.equ FAT16_FATBUF = 1
.else
.equ FAT16_FATBUF = 0
.endif
#define I2C_CLOCK 100000 /* 100kHz */
#define I2C_BUFSIZE 66 /* largest message size + slave address (SLA) + subaddress */
#define MMC_SPI2X 1 /* 0 = SPI CLK/4, 1 = SPI CLK/2 */
#define MEMFILL_VAL 0x76 /* Fill ram with HALT opcode. */
#define DBG_TRACE_BOTTOM 0x01 /* Page boundaries for INS_DEBUG and PRINT_PC */
#define DBG_TRACE_TOP 0xdc /* Trace is off, below bottom page and above top page. */
#define SRAMFILL_VAL 0x5A /* Fill unused SRAM */
; define PARTID 0x52 /* Partition table id */
/* http://www.win.tue.nl/~aeb/partitions/partition_types-1.html */
; Partition Table Structures
#define PART_TYPE 4
#define PART_START 8
#define PART_SIZE 12
/*
* Partition table id
* (see http://www.win.tue.nl/~aeb/partitions/partition_types-1.html)
*/
#define PARTID1_FAT16 0x0E
#define PARTID2_FAT16 0x06
#define PARTID_CPM 0x52
;-----------------------------------------------------------------------
;
#ifndef DRAM_8BIT
#define DRAM_8BIT 1 /* 1 = 8bit wide data bus to DRAM (ie two 4-bit Chips)*/
#endif /* 0 = only one 4 bit wide DRAM chip */
#ifndef F_CPU
#define F_CPU 20000000 /* system clock in Hz; defaults to 20MHz */
#endif
#ifndef BAUD
#define BAUD 115200 /* console baud rate */
#endif
#ifndef I2C_SUPPORT
#define I2C_SUPPORT DRAM_8BIT /* I2C requires 8 bit DRAM */
#endif
#if I2C_SUPPORT && !DRAM_8BIT
#error "I2C_SUPPORT requires 8 bit DRAM (DRAM_8BIT=1)!"
#endif
#ifndef I2C_UART_SUPPORT
#define I2C_UART_SUPPORT I2C_SUPPORT
#endif
#if I2C_UART_SUPPORT
#define SC16IS740_ADDR 0x90 /* SC16IS740 I2C address. (8bit, A0=VDD, A1=VDD) */
#define SC16IS740_CLOCK 9216000 /* */
#endif
#ifndef EM_Z80
#define EM_Z80 1 /* Emulate Z80 if true, else 8080 */
#endif
#ifndef CPMDSK_SUPPORT
#define CPMDSK_SUPPORT 1 /* Include Support for CP/M partitions */
#endif
#ifndef FAT16_SUPPORT
#define FAT16_SUPPORT 1 /* Include Support for a FAT16 partition */
#endif /* which may contain CP/M image files. */
#ifndef RAMDISKCNT
#define RAMDISKCNT 0 /* Number of RAM disks */
#endif
#define RAMDISKNR 'I'-'A' /* Drive "letter" for first RAM disk */
/* MMC/SD Bootloader support. */
#define BOOTLDRSIZE 2048 /* Bytes needed for Bootloader (1024 Words Bootsection Size) */
#define DEVID_S "ACPM"
#ifndef MMCBOOTLOADER
#define MMCBOOTLOADER 1
#endif
#ifndef TESTVERSION
#define TESTVERSION 0
#endif
#define TC_1MS (F_CPU/1000)
#define TC_1US (F_CPU/1000000)
;-----------------------------------------------------------------------
; Port declarations
#if DRAM_8BIT /* Implies software uart */
;Port D
.equ RAM_D0 = 0
.equ RAM_D1 = 1
.equ RAM_D2 = 2
.equ RAM_D3 = 3
.equ RAM_D4 = 4
.equ RAM_D5 = 5
.equ RAM_D6 = 6
.equ RAM_D7 = 7
.equ RAM_A0 = 0
.equ RAM_A1 = 1
.equ RAM_A2 = 2
.equ RAM_A3 = 3
.equ RAM_A4 = 4
.equ RAM_A5 = 5
.equ RAM_A6 = 6
.equ RAM_A7 = 7
;Port B
.equ MMC_MOSI = 3
.equ MMC_MISO = 4
.equ MMC_SCK = 5
.equ RAM_A8 = 3
.equ RAM_A9 = 4
.equ RAM_A10 = 5
.equ RXD = 0
.equ TXD = 1
.equ MMC_CS = 2
.equ P_MMC_CS = PORTB
.equ P_A8 = PORTB
.equ P_RXD = PORTB
.equ P_TXD = PORTB
;Port C
.equ RAM_RAS = 0
.equ RAM_CAS = 1
.equ RAM_OE = 2
.equ RAM_W = 3
.equ SDA = 4
.equ SCL = 5
.equ P_RAS = PORTC
.equ P_CAS = PORTC
.equ P_OE = PORTC
.equ P_W = PORTC
.equ P_I2C = PORTC
#else /* 4 bit RAM, hardware uart */
; Port D
.equ RXD = 0
.equ TXD = 1
.equ RAM_OE = 2
.equ RAM_A8 = 3
.equ MMC_CS = 4
.equ RAM_A5 = 5
.equ RAM_A6 = 6
.equ RAM_A7 = 7
.equ P_RXD = PORTD
.equ P_OE = PORTD
.equ P_A8 = PORTD
.equ P_MMC_CS = PORTD
.equ P_AH = PORTD
; RAM_A[7..5]
.equ RAM_AH_MASK = (1<