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imds-225, isys80xx, ibmpc, ibmpcxt: Address Coverity identified problems

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This commit is contained in:
Bill Beech 2017-06-07 11:34:26 -07:00
parent 625d1b391e
commit 6fcd70128e
5 changed files with 30 additions and 26 deletions
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36
Intel-Systems/common/i8088.c
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@ -261,9 +261,9 @@ int32 CS; /* Code Segment Register */
int32 DS; /* Data Segment Register */
int32 SS; /* Stack Segment Register */
int32 ES; /* Extra Segment Register */
int32 IP; /* Program Counter */
uint32 IP; /* Program Counter */
int32 PSW; /* Program Status Word (Flags) */
int32 saved_PC = 0; /* saved program counter */
uint32 saved_PC = 0; /* saved program counter */
int32 int_req = 0; /* Interrupt request 0x01 = int, 0x02 = NMI*/
uint16 port; //port called in dev_table[port]
int32 chip = 0; /* 0 = 8088 chip, 1 = 8086 chip */
@ -472,8 +472,6 @@ DEVICE i8088_dev = {
uint8 xor_3_tab[] = { 0, 1, 1, 0 };
int32 IP;
static const char *opcode[256] = {
"ADD\t", "ADD\t", "ADD\t", "ADD\t", /* 0x00 */
"ADD\tAL,", "ADD\tAX,", "PUSH\tES", "POP\tES",
@ -543,30 +541,34 @@ static const char *opcode[256] = {
/*
0 = 1 byte opcode
1 = DATA8
2 = DATA16
3 = IP-INC8
4 = IP-INC16
1 = d8
2 = d16
3 = rel8
4 = rel16
5 = r/m8,r8
6 = r/m16,r16
7 = r/m8
8 = r/m16
20 = I haven't figured it out yet!
*/
int32 oplen[256] = {
20,20,20,20, 1, 2, 0, 0, 20,20,20,20, 1, 2, 0, 0, //0x00
20,20,20,20, 1, 2, 0, 0, 20,20,20,20, 1, 2, 0, 0, //0x10
20,20,20,20, 1, 2, 0, 0, 20,20,20,20, 1, 2, 0, 0, //0x20
20,20,20,20, 1, 2, 0, 0, 20,20,20,20, 1, 2, 0, 0, //0x30
5, 6, 5, 6, 1, 2, 0, 0, 5, 6, 5, 6, 1, 2, 0, 0, //0x00
5, 6, 5, 6, 1, 2, 0, 0, 5, 6, 5, 6, 1, 2, 0, 0, //0x10
5, 6, 5, 6, 1, 2, 0, 0, 5, 6, 5, 6, 1, 2, 0, 0, //0x20
5, 6, 5, 6, 1, 2, 0, 0, 5, 6, 5, 6, 1, 2, 0, 0, //0x30
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //0x40
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //0x50
20,20,20,20,20,20,20,20, 20,20,20,20,20,20,20,20, //0x60
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, //0x70
20,20,20,20,20,20,20,20, 20,20,20,20,20,20,20,20, //0x80
5, 6, 5, 6, 5, 6, 5, 6, 5, 6, 5, 6, 5, 6, 5, 6, //0x80
0, 0, 0, 0, 0, 0, 0, 0, 0,20, 0, 0, 0, 0, 0, 0, //0x90
20,20,20,20, 0, 0, 0, 0, 1, 2, 0, 0, 0, 0, 0, 0, //0xA0
1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, //0xB0
0, 0, 2, 0,20,20,20,20, 0, 0, 2, 0, 0, 1, 0, 0, //0xC0
20,20,20,20, 0, 0, 0, 0, 20,20,20,20,20,20,20,20, //0xD0
3, 3, 3, 3, 1, 1, 1, 1, 4, 4,20, 3, 0, 0, 0, 0, //0xE0
0, 0, 0, 0, 0, 0,20,20, 0, 0, 0, 0, 0, 0,20,20, //0xF0
0, 0, 0, 0, 0, 0, 5, 6, 0, 0, 0, 0, 0, 0, 7, 8 //0xF0
};
void set_cpuint(int32 int_num)
@ -578,8 +580,8 @@ void set_cpuint(int32 int_num)
int32 sim_instr (void)
{
extern int32 sim_interval;
int32 IR, OP, reason;
int32 MRR, REG, EA, MOD, RM, VAL, DATA, OFF, SEG, INC, VAL1;
uint32 IR, OP, reason;
uint32 MRR, REG, EA, MOD, RM, VAL, DATA, OFF, SEG, INC, VAL1;
IP = saved_PC & ADDRMASK16; /* load local IP */
reason = 0; /* clear stop reason */
@ -591,7 +593,7 @@ int32 sim_instr (void)
sim_printf("\n");
if (sim_interval <= 0) { /* check clock queue */
if (reason = sim_process_event ()) break;
if ((reason = sim_process_event())) break;
}
if (int_req > 0) { /* interrupt? */

4
Intel-Systems/common/i8255.c
View file

@ -83,7 +83,7 @@
extern uint16 port; //port called in dev_table[port]
/* function prototypes */
/* internal function prototypes */
t_stat i8255_reset (DEVICE *dptr, uint16 baseport);
uint8 i8255_get_dn(void);
@ -154,7 +154,7 @@ DEVICE i8255_dev = {
i8255_unit, //units
i8255_reg, //registers
NULL, //modifiers
1, //numunits
I8255_NUM, //numunits
16, //aradix
16, //awidth
1, //aincr

2
Intel-Systems/common/isbc202.c
View file

@ -454,7 +454,7 @@ uint8 isbc202_get_dn(void)
return 0xFF;
}
/* ISBC202 control port functions */
/* iSBC202 control port functions */
uint8 isbc2020(t_bool io, uint8 data)
{

2
Intel-Systems/common/isbc208.c
View file

@ -800,11 +800,13 @@ t_stat isbc208_svc (UNIT *uptr)
}
//*** quick fix. Needs more thought!
fp = fopen(uptr->filename, "wb"); // write out modified image
if (fp) {
for (i=0; i<uptr->capac; i++) {
c = *(isbc208_buf[uptr->u6] + i) & 0xFF;
fputc(c, fp);
}
fclose(fp);
}
//*** need to step return results IAW table 3-11 in 143078-001
i8272_w2 = cyl; /* generate a current address mark */
i8272_w3 = hed >> 2;