folkert/simh-testsetgenerator
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

ISYS8020: Corrected iSBC80-20 to enable/disable EPROM and RAM correctly

Browse source
This commit is contained in:
Bill Beech 2015-05-08 16:01:40 -07:00
parent 32945f5b70
commit a663e1408b
1 changed files with 4 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
Intel-Systems/common/iSBC80-20.c
View file

@ -102,11 +102,11 @@ int32 get_mbyte(int32 addr)
int32 val, org, len; int32 val, org, len;
/* if local EPROM handle it */ /* if local EPROM handle it */
if ((i8255_unit.u6 & 0x01) && /* EPROM enabled? */ if ((i8255_unit.u5 & 0x01) && /* EPROM enabled? */
(addr >= EPROM_unit.u3) && (addr < (EPROM_unit.u3 + EPROM_unit.capac))) { (addr >= EPROM_unit.u3) && (addr < (EPROM_unit.u3 + EPROM_unit.capac))) {
return EPROM_get_mbyte(addr); return EPROM_get_mbyte(addr);
} /* if local RAM handle it */ } /* if local RAM handle it */
if ((i8255_unit.u6 & 0x02) && /* local RAM enabled? */ if ((i8255_unit.u5 & 0x02) && /* local RAM enabled? */
(addr >= RAM_unit.u3) && (addr < (RAM_unit.u3 + RAM_unit.capac))) { (addr >= RAM_unit.u3) && (addr < (RAM_unit.u3 + RAM_unit.capac))) {
return RAM_get_mbyte(addr); return RAM_get_mbyte(addr);
} /* otherwise, try the multibus */ } /* otherwise, try the multibus */
@ -129,12 +129,12 @@ int32 get_mword(int32 addr)
void put_mbyte(int32 addr, int32 val) void put_mbyte(int32 addr, int32 val)
{ {
/* if local EPROM handle it */ /* if local EPROM handle it */
if ((i8255_unit.u6 & 0x01) && /* EPROM enabled? */ if ((i8255_unit.u5 & 0x01) && /* EPROM enabled? */
(addr >= EPROM_unit.u3) && (addr <= (EPROM_unit.u3 + EPROM_unit.capac))) { (addr >= EPROM_unit.u3) && (addr <= (EPROM_unit.u3 + EPROM_unit.capac))) {
sim_printf("Write to R/O memory address %04X - ignored\n", addr); sim_printf("Write to R/O memory address %04X - ignored\n", addr);
return; return;
} /* if local RAM handle it */ } /* if local RAM handle it */
if ((i8255_unit.u6 & 0x02) && /* local RAM enabled? */ if ((i8255_unit.u5 & 0x02) && /* local RAM enabled? */
(addr >= RAM_unit.u3) && (addr <= (RAM_unit.u3 + RAM_unit.capac))) { (addr >= RAM_unit.u3) && (addr <= (RAM_unit.u3 + RAM_unit.capac))) {
RAM_put_mbyte(addr, val); RAM_put_mbyte(addr, val);
return; return;