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recipe/rc2014/zasm: new recipe
This commit is contained in:
Virgil Dupras
parent
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commit
50a26f6e39
@ -24,6 +24,7 @@ This recipe is for installing a minimal Collapse OS system on the RC2014. There
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are other recipes related to the RC2014:
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are other recipes related to the RC2014:
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* [Accessing a MicroSD card](sdcard/README.md)
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* [Accessing a MicroSD card](sdcard/README.md)
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* [Assembling binaries](zasm/README.md)
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## Goal
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## Goal
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1
recipes/rc2014/zasm/.gitignore
vendored
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1
recipes/rc2014/zasm/.gitignore
vendored
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@ -0,0 +1 @@
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/cfsin/zasm
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25
recipes/rc2014/zasm/Makefile
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25
recipes/rc2014/zasm/Makefile
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@ -0,0 +1,25 @@
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CFSTARGETS = cfsin/zasm cfsin/user.h
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BASE = ../../..
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TOOLS = $(BASE)/tools
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ZASM = $(TOOLS)/zasm.sh
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KERNEL = $(BASE)/kernel
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APPS = $(BASE)/apps
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CFSPACK = $(TOOLS)/cfspack/cfspack
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.PHONY: all
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all: os.bin sdcard.cfs
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os.bin: glue.asm
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$(ZASM) $(KERNEL) < $< > $@
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$(CFSPACK):
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make -C $(TOOLS)/cfspack
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sdcard.cfs: $(CFSTARGETS) $(CFSPACK)
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$(CFSPACK) cfsin > $@
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cfsin/zasm: $(ZASMBIN)
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$(ZASM) $(KERNEL) $(APPS) user.h < $(APPS)/zasm/glue.asm > $@
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cfsin/user.h: user.h
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cp $< $@
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62
recipes/rc2014/zasm/README.md
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62
recipes/rc2014/zasm/README.md
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@ -0,0 +1,62 @@
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# Assembling binaries
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For a system to be able to self-reproduce, it needs to assemble source z80
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assembly to binary.
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## Goals
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Have a RC2014 assemble a Collapse OS kernel with its source living on a CFS on
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a SD card.
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**Work in progress: for now, we compile a simple hello.asm source file.**
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## Gathering parts
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* Same parts as the [SD card recipe](../sdcard).
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## The zasm binary
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To achieve our goal in this recipe, we'll need a zasm binary on the SD card.
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This zasm binary needs to be compiled with the right jump offsets for the kernel
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we build in this recipe. These offsets are in `user.h` and are closely in sync
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with the configuration in `glue.asm`.
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`user.h` is then included in `apps/zasm/glue.asm`.
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The makefile in this recipe takes care of compiling zasm with the proper
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`user.h` file and place it in `cfsin/zasm`
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## The userland source
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The code we're going to compile is `cfsin/hello.asm`. As you can see, we also
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include `user.h` in this source code or else `ld hl, sAwesome` would load the
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wrong offset.
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Because of this, the Makefile takes care of copying `user.h` in our filesystem.
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## Preparing the card and kernel
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After running `make`, you'll end up with `sdcard.cfs` which you can load the
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same way you did in the SD card recipe.
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You will also have `os.bin`, which you can flash on your EEPROM the same way
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you already did before.
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## Running it
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Compiling and running `hello.asm` is done very much like in
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[the shell emulator](../../../doc/zasm.md):
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Collapse OS
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> sdci
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> fson
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> fopn 0 hello.asm
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> zasm 2 1
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> mptr 8600
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> bsel 1
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> seek 00 0000
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> load ff
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> call 00 0000
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Assembled from a RC2014
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That RC2014 is starting to feel powerful now, right?
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11
recipes/rc2014/zasm/cfsin/hello.asm
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11
recipes/rc2014/zasm/cfsin/hello.asm
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#include "user.h"
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.org USER_CODE
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ld hl, sAwesome
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call printstr
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xor a ; success
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ret
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sAwesome:
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.db "Assembled from a RC2014", 0x0d, 0x0a, 0
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26
recipes/rc2014/zasm/cfsin/user.h
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26
recipes/rc2014/zasm/cfsin/user.h
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.equ USER_CODE 0x8600
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.equ USER_RAMSTART USER_CODE+0x1800
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.equ FS_HANDLE_SIZE 8
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; *** JUMP TABLE ***
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.equ strncmp 0x03
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.equ addDE 0x06
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.equ addHL 0x09
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.equ upcase 0x0c
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.equ unsetZ 0x0f
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.equ intoDE 0x12
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.equ intoHL 0x15
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.equ writeHLinDE 0x18
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.equ findchar 0x1b
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.equ parseHex 0x1e
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.equ parseHexPair 0x21
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.equ blkSel 0x24
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.equ fsFindFN 0x27
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.equ fsOpen 0x2a
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.equ fsGetC 0x2d
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.equ fsSeek 0x30
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.equ fsTell 0x33
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.equ cpHLDE 0x3b
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.equ parseArgs 0x3e
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.equ printstr 0x41
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124
recipes/rc2014/zasm/glue.asm
Normal file
124
recipes/rc2014/zasm/glue.asm
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@ -0,0 +1,124 @@
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; 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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; kernel RAM usage is under 0x300 bytes. We give ourselves at least 0x300 bytes
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; for the stack.
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.equ RAMEND 0x8600
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.equ PGM_CODEADDR RAMEND
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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 ; 3 bytes
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; *** Jump Table ***
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jp strncmp
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jp addDE
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jp addHL
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jp upcase
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jp unsetZ
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jp intoDE
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jp intoHL
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jp writeHLinDE
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jp findchar
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jp parseHex
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jp parseHexPair
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jp blkSel
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jp fsFindFN
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jp fsOpen
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jp fsGetC
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jp fsSeek
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jp fsTell ; approaching 0x38...
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; interrupt hook
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.fill 0x38-$
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jp aciaInt
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; *** Jump Table (cont.) ***
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jp cpHLDE
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jp parseArgs
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jp printstr
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#include "err.h"
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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 3
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#include "blockdev.asm"
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; List of devices
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.dw sdcGetC, sdcPutC, sdcSeek, sdcTell
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.dw mmapGetC, mmapPutC, mmapSeek, mmapTell
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.dw blk2GetC, blk2PutC, blk2Seek, blk2Tell
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#include "blockdev_cmds.asm"
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.equ MMAP_RAMSTART BLOCKDEV_RAMEND
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.equ MMAP_START 0xe000
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#include "mmap.asm"
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.equ STDIO_RAMSTART MMAP_RAMEND
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#include "stdio.asm"
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.equ FS_RAMSTART STDIO_RAMEND
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.equ FS_HANDLE_COUNT 1
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#include "fs.asm"
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#include "fs_cmds.asm"
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.equ SHELL_RAMSTART FS_RAMEND
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.equ SHELL_EXTRA_CMD_COUNT 11
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#include "shell.asm"
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.dw sdcInitializeCmd, sdcFlushCmd
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.dw blkBselCmd, blkSeekCmd, blkLoadCmd, blkSaveCmd
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.dw fsOnCmd, flsCmd, fnewCmd, fdelCmd, fopnCmd
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.equ PGM_RAMSTART SHELL_RAMEND
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#include "pgm.asm"
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.equ SDC_RAMSTART PGM_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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.out SDC_RAMEND
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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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ld hl, aciaGetC
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ld de, aciaPutC
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call stdioInit
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call mmapInit
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call shellInit
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ld hl, pgmShellHook
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ld (SHELL_CMDHOOK), hl
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xor a
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ld de, BLOCKDEV_GETC
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call blkSel
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ei
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jp shellLoop
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; *** blkdev 2: file handle 0 ***
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blk2GetC:
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ld ix, FS_HANDLES
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jp fsGetC
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blk2PutC:
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ld ix, FS_HANDLES
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jp fsPutC
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blk2Seek:
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ld ix, FS_HANDLES
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jp fsSeek
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blk2Tell:
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ld ix, FS_HANDLES
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jp fsTell
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26
recipes/rc2014/zasm/user.h
Normal file
26
recipes/rc2014/zasm/user.h
Normal file
@ -0,0 +1,26 @@
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.equ USER_CODE 0x8600
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.equ USER_RAMSTART USER_CODE+0x1800
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.equ FS_HANDLE_SIZE 8
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; *** JUMP TABLE ***
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.equ strncmp 0x03
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.equ addDE 0x06
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.equ addHL 0x09
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.equ upcase 0x0c
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.equ unsetZ 0x0f
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.equ intoDE 0x12
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.equ intoHL 0x15
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.equ writeHLinDE 0x18
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.equ findchar 0x1b
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.equ parseHex 0x1e
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.equ parseHexPair 0x21
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.equ blkSel 0x24
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.equ fsFindFN 0x27
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.equ fsOpen 0x2a
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.equ fsGetC 0x2d
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.equ fsSeek 0x30
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.equ fsTell 0x33
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.equ cpHLDE 0x3b
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.equ parseArgs 0x3e
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.equ printstr 0x41
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@ -81,6 +81,7 @@ init:
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ld hl, emulGetC
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ld hl, emulGetC
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ld de, emulPutC
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ld de, emulPutC
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call stdioInit
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call stdioInit
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call mmapInit
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call fsInit
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call fsInit
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ld a, 0 ; select fsdev
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ld a, 0 ; select fsdev
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ld de, BLOCKDEV_GETC
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ld de, BLOCKDEV_GETC
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