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collapseos/recipes/rc2014/zasm/glue.asm

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recipe/rc2014/zasm: new recipe
2019-06-04 03:34:16 +10:00
; classic RC2014 setup (8K ROM + 32K RAM) and a stock Serial I/O module
; The RAM module is selected on A15, so it has the range 0x8000-0xffff
.equ RAMSTART 0x8000
; kernel RAM usage is under 0x300 bytes. We give ourselves at least 0x300 bytes
; for the stack.
.equ RAMEND 0x8600
.equ PGM_CODEADDR RAMEND
.equ ACIA_CTL 0x80 ; Control and status. RS off.
.equ ACIA_IO 0x81 ; Transmit. RS on.
jp init ; 3 bytes
; *** Jump Table ***
jp strncmp
jp addDE
jp addHL
jp upcase
jp unsetZ
jp intoDE
jp intoHL
jp writeHLinDE
jp findchar
jp parseHex
jp parseHexPair
jp blkSel
jp fsFindFN
jp fsOpen
jp fsGetC
jp fsSeek
jp fsTell ; approaching 0x38...
; interrupt hook
.fill 0x38-$
jp aciaInt
; *** Jump Table (cont.) ***
jp cpHLDE
jp parseArgs
jp printstr
blockdev: make implementors "random access" This huge refactoring remove the Seek and Tell routine from blockdev implementation requirements and change GetC and PutC's API so that they take an address to read and write (through HL/DE) at each call. The "PTR" approach in blockdev implementation was very redundant from device to device and it made more sense to generalize. It's possible that future device aren't "random access", but we'll be able to add more device types later. Another important change in this commit is that the "blockdev handle" is now opaque. Previously, consumers of the API would happily call routines directly from one of the 4 offsets. We can't do that any more. This makes the API more solid for future improvements. This change forced me to change a lot of things in fs, but overall, things are now simpler. No more `FS_PTR`: the "device handle" now holds the active pointer. Lots, lots of changes, but it also feels a lot cleaner and solid.
2019-06-05 01:53:02 +10:00
jp _blkGetC
jp _blkPutC
jp _blkSeek
jp _blkTell
recipe/rc2014/zasm: new recipe
2019-06-04 03:34:16 +10:00
#include "err.h"
#include "core.asm"
#include "parse.asm"
.equ ACIA_RAMSTART RAMSTART
#include "acia.asm"
.equ BLOCKDEV_RAMSTART ACIA_RAMEND
.equ BLOCKDEV_COUNT 3
#include "blockdev.asm"
; List of devices
blockdev: make implementors "random access" This huge refactoring remove the Seek and Tell routine from blockdev implementation requirements and change GetC and PutC's API so that they take an address to read and write (through HL/DE) at each call. The "PTR" approach in blockdev implementation was very redundant from device to device and it made more sense to generalize. It's possible that future device aren't "random access", but we'll be able to add more device types later. Another important change in this commit is that the "blockdev handle" is now opaque. Previously, consumers of the API would happily call routines directly from one of the 4 offsets. We can't do that any more. This makes the API more solid for future improvements. This change forced me to change a lot of things in fs, but overall, things are now simpler. No more `FS_PTR`: the "device handle" now holds the active pointer. Lots, lots of changes, but it also feels a lot cleaner and solid.
2019-06-05 01:53:02 +10:00
.dw sdcGetC, sdcPutC
.dw mmapGetC, mmapPutC
.dw blk2GetC, blk2PutC
recipe/rc2014/zasm: new recipe
2019-06-04 03:34:16 +10:00
.equ MMAP_START 0xe000
#include "mmap.asm"
blockdev: make implementors "random access" This huge refactoring remove the Seek and Tell routine from blockdev implementation requirements and change GetC and PutC's API so that they take an address to read and write (through HL/DE) at each call. The "PTR" approach in blockdev implementation was very redundant from device to device and it made more sense to generalize. It's possible that future device aren't "random access", but we'll be able to add more device types later. Another important change in this commit is that the "blockdev handle" is now opaque. Previously, consumers of the API would happily call routines directly from one of the 4 offsets. We can't do that any more. This makes the API more solid for future improvements. This change forced me to change a lot of things in fs, but overall, things are now simpler. No more `FS_PTR`: the "device handle" now holds the active pointer. Lots, lots of changes, but it also feels a lot cleaner and solid.
2019-06-05 01:53:02 +10:00
.equ STDIO_RAMSTART BLOCKDEV_RAMEND
recipe/rc2014/zasm: new recipe
2019-06-04 03:34:16 +10:00
#include "stdio.asm"
.equ FS_RAMSTART STDIO_RAMEND
.equ FS_HANDLE_COUNT 1
#include "fs.asm"
.equ SHELL_RAMSTART FS_RAMEND
.equ SHELL_EXTRA_CMD_COUNT 11
#include "shell.asm"
.dw sdcInitializeCmd, sdcFlushCmd
.dw blkBselCmd, blkSeekCmd, blkLoadCmd, blkSaveCmd
.dw fsOnCmd, flsCmd, fnewCmd, fdelCmd, fopnCmd
blockdev: make implementors "random access" This huge refactoring remove the Seek and Tell routine from blockdev implementation requirements and change GetC and PutC's API so that they take an address to read and write (through HL/DE) at each call. The "PTR" approach in blockdev implementation was very redundant from device to device and it made more sense to generalize. It's possible that future device aren't "random access", but we'll be able to add more device types later. Another important change in this commit is that the "blockdev handle" is now opaque. Previously, consumers of the API would happily call routines directly from one of the 4 offsets. We can't do that any more. This makes the API more solid for future improvements. This change forced me to change a lot of things in fs, but overall, things are now simpler. No more `FS_PTR`: the "device handle" now holds the active pointer. Lots, lots of changes, but it also feels a lot cleaner and solid.
2019-06-05 01:53:02 +10:00
#include "fs_cmds.asm"
#include "blockdev_cmds.asm"
recipe/rc2014/zasm: new recipe
2019-06-04 03:34:16 +10:00
.equ PGM_RAMSTART SHELL_RAMEND
#include "pgm.asm"
.equ SDC_RAMSTART PGM_RAMEND
.equ SDC_PORT_CSHIGH 6
.equ SDC_PORT_CSLOW 5
.equ SDC_PORT_SPI 4
#include "sdc.asm"
.out SDC_RAMEND
init:
di
; setup stack
ld hl, RAMEND
ld sp, hl
im 1
call aciaInit
ld hl, aciaGetC
ld de, aciaPutC
call stdioInit
call shellInit
ld hl, pgmShellHook
ld (SHELL_CMDHOOK), hl
xor a
blockdev: make selection structure opaque I'm about to change that structure and I don't want fs to be messed up by this. I'm proceeding step by step...
2019-06-04 23:56:36 +10:00
ld de, BLOCKDEV_SEL
recipe/rc2014/zasm: new recipe
2019-06-04 03:34:16 +10:00
call blkSel
ei
jp shellLoop
; *** blkdev 2: file handle 0 ***
blk2GetC:
ld ix, FS_HANDLES
jp fsGetC
blk2PutC:
ld ix, FS_HANDLES
jp fsPutC
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