mirror of https://github.com/hsoft/collapseos.git
70 lines
1.3 KiB
NASM
70 lines
1.3 KiB
NASM
; classic RC2014 setup (8K ROM + 32K RAM) and a stock Serial I/O module
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; The RAM module is selected on A15, so it has the range 0x8000-0xffff
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.equ RAMSTART 0x8000
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.equ RAMEND 0xffff
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.equ ACIA_CTL 0x80 ; Control and status. RS off.
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.equ ACIA_IO 0x81 ; Transmit. RS on.
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jp init
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; *** JUMP TABLE ***
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; Why not use this unused space between 0x03 and 0x38 for a jump table?
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jp printstr
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jp printHex
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jp sdcInitialize
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jp sdcSendRecv
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jp sdcWaitResp
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jp sdcCmd
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jp sdcCmdR1
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jp sdcCmdR7
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jp sdcReadBlk
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jp sdcSetBlkSize
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; interrupt hook
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.fill 0x38-$
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jp aciaInt
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#include "core.asm"
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#include "parse.asm"
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.equ ACIA_RAMSTART RAMSTART
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#include "acia.asm"
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.equ BLOCKDEV_RAMSTART ACIA_RAMEND
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.equ BLOCKDEV_COUNT 2
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#include "blockdev.asm"
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; List of devices
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.dw aciaGetC, aciaPutC, 0, 0
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.dw sdcGetC, 0, 0, 0
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#include "blockdev_cmds.asm"
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.equ STDIO_RAMSTART BLOCKDEV_RAMEND
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#include "stdio.asm"
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.equ SHELL_RAMSTART STDIO_RAMEND
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.equ SHELL_EXTRA_CMD_COUNT 3
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#include "shell.asm"
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.dw sdcInitializeCmd, blkBselCmd, blkSeekCmd
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.equ SDC_RAMSTART SHELL_RAMEND
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.equ SDC_PORT_CSHIGH 6
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.equ SDC_PORT_CSLOW 5
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.equ SDC_PORT_SPI 4
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#include "sdc.asm"
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init:
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di
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; setup stack
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ld hl, RAMEND
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ld sp, hl
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im 1
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call aciaInit
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xor a
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ld de, BLOCKDEV_GETC
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call blkSel
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call stdioInit
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call shellInit
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ei
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jp shellLoop
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