We now have a disk driver and a serial driver.
LIBPATH=../../Library/libs
LIBC=$(LIBPATH)/libc8080.a $(ACK_ROOT)/share/ack/cpm/libem.a
-CSRCS += devices.c main.c devtty.c
+CSRCS += devices.c main.c devtty.c devfd.c
ASRCS = crt0.s commonmem.s v8080.s tricks.s end.s
AOBJS = $(ASRCS:.s=.o)
COBJS = $(CSRCS:.c=.o)
-OBJS = $(AOBJS) $(COBJS) $(DOBJS) $(NOBJS)
+OBJS = $(AOBJS) $(COBJS)
JUNK = *.o *.lst *.asm *.sym *.rst
$(CROSS_CC) $(CROSS_CCOPTS) $<
clean:
- rm -f $(OBJS) $(JUNK) core *~
+ rm -f $(OBJS) $(JUNK) core *~ bootblock.bin bootblock
-image:
- $(CROSS_LD) -o fuzix.bin crt0.o devices.o main.o \
- commonmem.o tricks.o v8080.o devtty.o \
- ../start.o ../version.o ../lowlevel-8080.o \
- ../bankfixed.o ../timer.o ../kdata.o \
- ../devio.o ../filesys.o ../process.o ../inode.o ../syscall_fs.o \
- ../syscall_proc.o ../syscall_other.o ../mm.o ../swap.o \
- ../tty.o ../devsys.o ../usermem.o ../syscall_fs2.o \
- ../syscall_fs3.o ../syscall_exec16.o \
- ../usermem_std-8080.o $(LIBC) end.o
- ack -o fuzix.raw crt0.o devices.o main.o \
+bootblock:
+ ack -mfuzix -c bootblock.s
+ $(ACK_ROOT)/lib/ack/em_led -btext:0 -o bootblock.bin -s bootblock.o
+ aslod <bootblock.bin >bootblock
+
+image: bootblock
+ $(CROSS_LD) -b0:0x0100 -b4:0xE800 -o fuzix.bin crt0.o devices.o main.o \
commonmem.o tricks.o v8080.o devtty.o \
../start.o ../version.o ../lowlevel-8080.o \
../bankfixed.o ../timer.o ../kdata.o \
../syscall_proc.o ../syscall_other.o ../mm.o ../swap.o \
../tty.o ../devsys.o ../usermem.o ../syscall_fs2.o \
../syscall_fs3.o ../syscall_exec16.o \
- ../usermem_std-8080.o $(LIBC) end.o
+ ../usermem_std-8080.o devfd.o $(LIBC) end.o
+ anm fuzix.bin | ../tools/8080map > ../fuzix.map
+ ../tools/ack2kernel -v fuzix.bin ../fuzix.bin
Some initial development code for 8080 support
This is not finished (the block copiers for forking, udata and usermem all
-need writing). In addition
+need writing).
+Drivers
+- No disk driver yet
+- Minimal serial driver for 88-2 style serial (assumes firmware set the ports up)
+ and doesn't yet do interrupt
+
+
+
+Also to deal with
- The C compiler bombs on the adventure game builds
- The preprocessor can't handle netd or fforth
- We need signal handler code and kernel IRQ code to save memory temporaries
-#
+#include "../kernel-8080.def"
+
!
! Common on z80pack is at 0xF000 as defined by hardware.
!
+#include "../kernel-8080.def"
+
.sect .text
+.sect .rom
.sect .data
datastart:
.sect .bss
#include <tty.h>
#include <devsys.h>
#include <devtty.h>
+#include <devfd.h>
+
struct devsw dev_tab[] = /* The device driver switch table */
{
// minor open close read write ioctl
// -----------------------------------------------------------------
- /* 0: /dev/fd Floppy disc block devices */
- { no_open, no_close, no_rdwr, no_rdwr, no_ioctl },
- /* 1: /dev/hd Hard disc block devices (absent) */
- { no_open, no_close, no_rdwr, no_rdwr, no_ioctl },
+ /* 0: /dev/hd Hard disc block devices */
+ { hd_open, no_close, hd_read, hd_write, no_ioctl },
+ /* 1: /dev/fd Floppy disc block devices */
+ { fd_open, no_close, fd_read, fd_write, no_ioctl },
/* 2: /dev/tty TTY devices */
{ tty_open, tty_close, tty_read, tty_write, tty_ioctl },
/* 3: /dev/lpr Printer devices */
return 1;
}
-void tty_pollirq(void)
-{
-/* while(ASCI_STAT0 & 0x80)
- tty_inproc(1, ASCI_RDR0); */
-}
-
void tty_putc(uint8_t minor, unsigned char c)
{
switch(minor){
case 1:
-/* while(!(ASCI_STAT0 & 2));
- ASCI_TDR0 = c; */
+ ttyout(c);
break;
case 2:
-/* while(!(ASCI_STAT1 & 2));
- ASCI_TDR1 = c; */
+ ttyout2(c);
break;
}
}
ttyready_t tty_writeready(uint8_t minor)
{
- minor;
- return TTY_READY_NOW;
+ uint8_t r;
+ if (minor == 1)
+ r = ttyready();
+ else
+ r = ttyready2();
+ if (r)
+ return TTY_READY_NOW;
+ return TTY_READY_SOON;
}
/* kernel writes to system console -- never sleep! */
+#include "../kernel-8080.def"
+
.sect .common
.define commonend
! UZI mnemonics for memory addresses etc
-U_DATA = 0xF400 ! (this is struct u_data from kernel.h)
+U_DATA = 0xE800 ! (this is struct u_data from kernel.h)
U_DATA__TOTALSIZE = 0x200 ! 256+256 bytes.
-U_DATA_STASH = 0xEE00 ! EE00-EFFF
+U_DATA_STASH = 0xBE00 ! BE00-BFFF
PROGBASE = 0x0000
PROGLOAD = 0x0100
#include "../kernel-8080.def"
#include "../lib/8080fixedbank.s"
+
+.sect .common
+!
+! Copy all the user memory from bank a to bank c
+!
+
+bankfork:
+ lxi d,0x18FE
+ lxi h,0
+ mov b,a
+ ! We do D loops of E blocks. 8080 hasn't quite got enough
+ ! registers to do it in one go so we have to push/pop d thus
+ ! resetting E each cycle
+outer:
+ push d
+inner:
+ ! We do 8 bytes per loop and 254 loops per inner loop, so
+ ! 24 inner loops per run copies the needed space and a tiny shade
+ ! over
+ mov a,b
+ out 23
+ mov d,m
+ mov a,c
+ out 23
+ mov m,d
+ inx h
+ mov a,b
+ out 23
+ mov d,m
+ mov a,c
+ out 23
+ mov m,d
+ inx h
+ mov a,b
+ out 23
+ mov d,m
+ mov a,c
+ out 23
+ mov m,d
+ inx h
+ mov a,b
+ out 23
+ mov d,m
+ mov a,c
+ out 23
+ mov m,d
+ inx h
+ mov a,b
+ out 23
+ mov d,m
+ mov a,c
+ out 23
+ mov m,d
+ inx h
+ mov a,b
+ out 23
+ mov d,m
+ mov a,c
+ out 23
+ mov m,d
+ inx h
+ mov a,b
+ out 23
+ mov d,m
+ mov a,c
+ out 23
+ mov m,d
+ inx h
+ mov a,b
+ out 23
+ mov d,m
+ mov a,c
+ out 23
+ mov m,d
+ inx h
+ dcr e
+ jnz inner
+ pop d
+ dcr d
+ jnz outer
+
+ ret
_platform_monitor:
_platform_reboot:
- di
- hlt
+ mvi a,1
+ out 29
.define platform_interrupt_all
platform_interrupt_all:
ret
-.sect .code
+.sect .text
.define init_early
init_hardware:
! Hack for now
- lxi h,256
+ lxi h,400 ! 8 * 48K + 16K
shld _ramsize
- lxi h,192
+ lxi h,336
shld _procmem
mvi a,1
- out 8 ! Timer on
+ out 27 ! 100Hz timer on
jmp _program_vectors_k
map_kernel_di:
push psw
xra a
- out 0x40
+ out 21
pop psw
ret
jz map_kernel
mov a,m
map_process_a:
- out 0x40
+ out 21
ret
.define map_process_always
map_process_always_di:
push psw
lda U_DATA__U_PAGE
- out 0x40
+ out 21
pop psw
ret
map_save_kernel:
push psw
- in 0x40
+ in 21
sta map_save
xra a
- out 0x40
+ out 21
pop psw
ret
map_restore:
push psw
lda map_save
- out 0x40
+ out 21
pop psw
ret
.data1 0
.define outchar
+.define _ttyout
+!
+! MITS 88-2SIO style serial ports at 0 and 40
+!
+_ttyout:
+ pop h
+ pop d
+ push d
+ push h
+ mov a,e
outchar:
push psw
outcharw:
in 0
- rar
- jnc outcharw
+ ani 2
+ jz outcharw
pop psw
- out 0
+ out 1
+ ret
+
+.define _ttyout2
+
+_ttyout2:
+ pop h
+ pop d
+ push d
+ push h
+outw2:
+ in 2
+ ani 2
+ jz outw2
+ mov a,e
+ out 3
+ ret
+
+.define _ttyready
+.define _ttyready2
+
+_ttyready:
+ in 0
+ ani 2
+ mov e,a
+ ret
+_ttyready2:
+ in 2
+ ani 2
+ mov e,a
ret
+.define _tty_pollirq
+
+_tty_pollirq:
+ in 0
+ rar
+ jnc poll2
+ in 1
+ mov e,a
+ push d
+ mvi e,1
+ push d
+ call _tty_inproc
+ pop d
+ pop d
+poll2:
+ in 40
+ rar
+ rnc
+ in 41
+ mov e,a
+ push d
+ mvi e,2
+ push d
+ call _tty_inproc
+ pop d
+ pop d
+ ret
+
+
+.sect .common
+
+.define _fd_op
+
+_fd_op:
+ lxi h,_fd_drive
+ mov a,m
+ out 10 ! drive
+ inx h
+ mov a,m
+ out 11 ! track
+ inx h
+ mov a,m
+ out 12 ! sector l
+ inx h
+ mov a,m
+ out 17 ! sector h
+ inx h
+ mov a,m
+ out 15 ! dma l
+ inx h
+ mov a,m
+ out 16 ! dma h
+ inx h
+ mov a,m
+ out 21 ! mapping
+ inx h
+ mov a,m
+ out 13 ! issue
+ xra a
+ out 21 ! kernel mapping back
+ in 14 ! return status
+ mov e,a
+ ret
+
+.define _fd_drive
+.define _fd_track
+.define _fd_sector
+.define _fd_dma
+.define _fd_page
+.define _fd_cmd
+
+_fd_drive:
+ .data1 0
+_fd_track:
+ .data1 0
+_fd_sector:
+ .data2 0
+_fd_dma:
+ .data2 0
+_fd_page:
+ .data1 0
+_fd_cmd:
+ .data1 0
public / FUZIX.git / commitdiff