/*
+ * (C) Copyright 2014 Leo C. <erbl259-lmu@yahoo.de>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include "common.h"
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
#include <util/atomic.h>
#include "background.h"
+#include "env.h"
+#include "ff.h"
#include "serial.h"
#include "z80-if.h"
#include "debug.h"
+#include "print-utils.h"
#include "z180-serv.h"
-
-
/*--------------------------------------------------------------------------*/
uint8_t z80_get_byte(uint32_t adr)
{
uint8_t data;
-
+
z80_bus_cmd(Request);
data = z80_read(adr);
z80_bus_cmd(Release);
-
+
return data;
}
}
+static int msg_xmit_header(uint8_t func, uint8_t subf, int len)
+{
+ z80_memfifo_putc(fifo_msgout, 0xAE);
+ z80_memfifo_putc(fifo_msgout, len+2);
+ z80_memfifo_putc(fifo_msgout, func);
+ z80_memfifo_putc(fifo_msgout, subf);
+
+ return 0;
+}
+
+int msg_xmit(uint8_t func, uint8_t subf, int len, uint8_t *msg)
+{
+ msg_xmit_header(func, subf, len);
+ while (len--)
+ z80_memfifo_putc(fifo_msgout, *msg++);
+
+ return 0;
+}
+
void do_msg_ini_memfifo(uint8_t subf, int len, uint8_t * msg)
{
(void)len;
putchar(*msg++);
}
+/* echo message */
+void do_msg_echo(uint8_t subf, int len, uint8_t * msg)
+{
+ (void)subf;
+
+ /* send re-echo */
+ msg_xmit(1, 3, len, msg);
+}
+
+/* ---------------------------------------------------------------------------*/
+
+#define MAX_DRIVE 4
+#define BLOCK_SIZE 512
+
+
+struct cpm_drive_s {
+ uint8_t drv;
+ uint8_t device;
+ char *img_name;
+ FIL fd;
+};
+
+static uint8_t disk_buffer[BLOCK_SIZE];
+static struct cpm_drive_s drv_table[MAX_DRIVE];
+
+/*
+ db 2 ; disk command
+ ds 1 ; subcommand (login/read/write)
+ ds 1 ; @adrv (8 bits) +0
+ ds 1 ; @rdrv (8 bits) +1
+ ds 3 ; @xdph (24 bits) +2
+*/
+
+void do_msg_cpm_login(uint8_t subf, int len, uint8_t * msg)
+{
+
+ FRESULT res = 0;
+ uint8_t rc = 0;
+ uint8_t drv;
+ char *np;
+ uint8_t result_msg[3];
+
+ (void)subf;
+
+ if (len != 5) { /* TODO: check adrv, rdrv */
+ rc = 0x01;
+ goto out;
+ }
+
+ debug("\n## login: %c:\n", msg[0]+'A');
+
+
+ drv = msg[0];
+ if ( drv>= MAX_DRIVE) {
+ rc = 0x02;
+ goto out;
+ }
+
+/*
+ uint32_t dph = ((uint32_t)msg[4] << 16) + ((uint16_t)msg[3] << 8) + msg[2];
+*/
+
+ if (drv_table[drv].img_name != NULL) {
+ debug("## close: '%s'\n", drv_table[drv].img_name);
+ f_close(&drv_table[drv].fd);
+ free(drv_table[drv].img_name);
+ drv_table[drv].img_name = NULL;
+ }
+
+ strcpy_P((char *)disk_buffer, PSTR("dsk0"));
+ disk_buffer[3] = msg[0] + '0';
+ if (((np = getenv((char*)disk_buffer)) == NULL) ||
+ ((drv_table[drv].img_name = strdup(np)) == NULL)) {
+ rc = 0x03;
+ goto out;
+ }
+
+
+ res = f_open(&drv_table[drv].fd, drv_table[drv].img_name,
+ FA_WRITE | FA_READ);
+
+ debug("## open: '%s', (env: '%s'), res: %d\n",
+ drv_table[drv].img_name, disk_buffer, res);
+
+out:
+
+ if (res)
+ rc |= 0x80;
+
+ result_msg[0] = rc;
+ result_msg[1] = res;
+ result_msg[2] = res >> 8;
+
+ if (rc) {
+ debug("## error rc: %.02x, res: %d\n", rc, res);
+ };
+
+ /* send result*/
+ msg_xmit(2, subf, sizeof(result_msg), result_msg);
+}
+
+
+/*
+ db 2 ; disk command
+ ds 1 ; subcommand (login/read/write)
+ ds 1 ; @adrv (8 bits) +0
+ ds 1 ; @rdrv (8 bits) +1
+ ds 1 ; @cnt (8 bits) +2
+ ds 2 ; @trk (16 bits) +3
+ ds 2 ; @sect(16 bits) +5
+ ds 3 ; phys. transfer addr +7
+*/
+
+void do_msg_cpm_rw(uint8_t subf, int len, uint8_t * msg)
+{
+ uint8_t drv;
+ uint32_t addr;
+ uint32_t pos;
+
+ bool dowrite = (subf == 2);
+ FRESULT res = 0;
+ uint8_t rc = 0;
+ bool buserr = 0;
+ uint8_t result_msg[3];
+
+ if (len != 10) { /* TODO: check adrv, rdrv */
+ rc = 0x01;
+ goto out;
+ }
+
+ drv = msg[0];
+ if ( drv>= MAX_DRIVE) {
+ rc = 0x02;
+ goto out;
+ }
+
+ addr = ((uint32_t)msg[9] << 16) + ((uint16_t)msg[8] << 8) + msg[7];
+
+ /* bytes = BLOCK_SIZE; */ /* TODO: multi sector count */
+ pos = (((uint16_t)(msg[4] << 8) + msg[3]) * 8
+ + ((uint32_t)(msg[6] << 8) + msg[5])) * BLOCK_SIZE;
+
+
+ debug("## cpm_rw: %s %c: trk: %4d, sec: %d, pos: 0x%.5lx, addr: 0x%.5lx\n",
+ dowrite ? "write" : " read", msg[0]+'A',
+ ((uint16_t)(msg[4] << 8) + msg[3]), msg[5], pos, addr);
+
+
+
+ /* TODO: check bank boundary crossing */
+ /*
+ if (addr + BLOCK_SIZE > MAX_MEMORY)
+ ... = MAX_MEMORY - addr;
+ */
+
+
+ res = f_lseek(&drv_table[drv].fd, pos);
+ if (!res) {
+ unsigned int br;
+
+ if (dowrite) {
+ if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
+ buserr = 1;
+ } else {
+ z80_read_block(disk_buffer, addr, BLOCK_SIZE);
+ z80_bus_cmd(Release);
+ res = f_write(&drv_table[drv].fd, disk_buffer, BLOCK_SIZE, &br);
+ if (!res)
+ res = f_sync(&drv_table[drv].fd);
+ }
+ } else {
+ res = f_read(&drv_table[drv].fd, disk_buffer, BLOCK_SIZE, &br);
+ if (res == FR_OK) {
+ if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
+ buserr = 1;
+ } else {
+ z80_write_block(disk_buffer, addr, br);
+ z80_bus_cmd(Release);
+ }
+ }
+ }
+
+ if (br != BLOCK_SIZE) {
+ debug("## f_read res: %d, bytes rd/wr: %u\n", res, br);
+ dump_ram(disk_buffer, 0, 64, "Read Data");
+ res = -1;
+ }
+ }
+
+out:
+ if (buserr) {
+ debug("Bus timeout\n");
+ rc = 0x03;
+ }
+ if (res)
+ rc |= 0x80;
+
+ result_msg[0] = rc;
+ result_msg[1] = res;
+ result_msg[2] = res >> 8;
+
+ if (rc) {
+ debug("#### error rc: %.02x, res: %d\n", rc, res);
+ }
+
+ /* send result*/
+ msg_xmit(2, subf, sizeof(result_msg), result_msg);
+}
+
const FLASH struct msg_item z80_messages[] =
{
{ 1,
1, 1,
do_msg_char_out},
+ { 1,
+ 2, 2,
+ do_msg_echo},
+ { 2,
+ 0, 0,
+ do_msg_cpm_login},
+ { 2,
+ 1, 2,
+ do_msg_cpm_rw},
{ 0xff, /* end mark */
0, 0,
0},
fct, sub_fct);
return; /* TODO: unknown message # */
}
-
+
++i;
}
while (fct == z80_messages[i].fct) {
- if (sub_fct >= z80_messages[i].sub_min &&
+ if (sub_fct >= z80_messages[i].sub_min &&
sub_fct <= z80_messages[i].sub_max )
break;
++i;
while ((ch = z80_memfifo_getc(fifo_msgin)) >= 0) {
switch (state) {
case 0: /* wait for start of message */
- if (ch == 0x81) {
+ if (ch == 0xAE) { /* TODO: magic number */
msglen = 0;
idx = 0;
state = 1;
int msg_handling(int state)
{
uint8_t pending;
-
- ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
+
+ ATOMIC_BLOCK(ATOMIC_FORCEON) {
pending = (Stat & S_MSG_PENDING) != 0;
Stat &= ~S_MSG_PENDING;
}
-
+
if (pending) {
switch (state) {
- case 0:
+ case 0: /* need init */
+ /* Get address of fifo_list */
z80_bus_cmd(Request);
- uint32_t addr = z80_read(0x40) +
+ uint32_t fifo_list = z80_read(0x40) +
((uint16_t) z80_read(0x41) << 8) +
((uint32_t) z80_read(0x42) << 16);
z80_bus_cmd(Release);
- if (addr != 0) {
- z80_memfifo_init(fifo_msgin, addr);
- state = 1;
+ if (fifo_list != 0) {
+ /* Get address of fifo 0 */
+ z80_bus_cmd(Request);
+ uint32_t fifo_addr = z80_read(fifo_list) +
+ ((uint16_t) z80_read(fifo_list+1) << 8) +
+ ((uint32_t) z80_read(fifo_list+2) << 16);
+ z80_bus_cmd(Release);
+ if (fifo_addr != 0) {
+ z80_memfifo_init(fifo_msgin, fifo_addr);
+ state = 1;
+ }
}
break;
- case 1:
+ case 1: /* awaiting messages */
check_msg_fifo();
break;
}
return state;
}
-
-
-int console_handling(int state)
-{
- int ch;
- uint8_t pending;
-
- ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
- pending = (Stat & S_CON_PENDING) != 0;
- Stat &= ~S_CON_PENDING;
- }
-
- if (pending) {
- while ((ch = z80_memfifo_getc(fifo_conout)) >= 0) {
- putchar(ch);
- }
- }
-
- return state;
-}
-
-
static int handle_msg_handling;
void setup_z180_serv(void)
{
-
+
handle_msg_handling = bg_register(msg_handling, 0);
-// bg_register(console_handling, 0);
}
void restart_z180_serv(void)
z80_write(0x41, 0);
z80_write(0x42, 0);
z80_bus_cmd(Release);
-
- bg_setstat(handle_msg_handling, 0);
-}
-/*--------------------------------------------------------------------------*/
+ for (int i = 0; i < NUM_FIFOS; i++)
+ z80_memfifo_init(i, 0);
+ bg_setstat(handle_msg_handling, 0);
-#if 0
-void dump_mem(const FLASH uint8_t *addr, uint32_t len)
-{
- DBG_P(1, "hdrom dump:");
- while (len) {
- DBG_P(1, "\n %.5x:", addr);
- for (unsigned i = 0; i<16; i++)
- DBG_P(1, " %.2x", *addr++);
- len -= len > 16 ? 16 : len;
- }
- DBG_P(1, "\n");
}
-#endif
-/*--------------------------------------------------------------------------*/
+/*--------------------------------------------------------------------------*/
const FLASH uint8_t iniprog[] = {
0xAF, // xor a
0x21, 0x1E, 0x00, // ld hl,dmclrt ;load DMA registers
0x06, 0x08, // ld b,dmct_e-dmclrt
0x0E, 0x20, // ld c,sar0l
- 0xED, 0x93, // otimr
+ 0xED, 0x93, // otimr
0x3E, 0xC3, // ld a,0c3h ;dst +1, src +1, burst
0xED, 0x39, 0x31, // out0 (dmode),a ;
- 0x3E, 0x62, // ld a,062h ;enable dma0,
+ 0x3E, 0x62, // ld a,062h ;enable dma0,
0xED, 0x39, 0x30, //cl_1: out0 (dstat),a ;copy 64k
0x18, 0xFB, // jr cl_1 ;
- 0x00, 0x00, //dmclrt: dw 0 ;src (inc)
+ 0x00, 0x00, //dmclrt: dw 0 ;src (inc)
0x00, // db 0 ;src
0x00, 0x00, // dw 0 ;dst (inc),
0x00, // db 0 ;dst
0x00, 0x00, // dw 0 ;count (64k)
};
-
-
-
projects / z180-stamp.git / blobdiff