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Diffstat (limited to 'src/devices/cpu/tms1000/tms1000c.cpp')
-rw-r--r--src/devices/cpu/tms1000/tms1000c.cpp39
1 files changed, 20 insertions, 19 deletions
diff --git a/src/devices/cpu/tms1000/tms1000c.cpp b/src/devices/cpu/tms1000/tms1000c.cpp
index b69a683f280..0ef0687855e 100644
--- a/src/devices/cpu/tms1000/tms1000c.cpp
+++ b/src/devices/cpu/tms1000/tms1000c.cpp
@@ -4,46 +4,47 @@
TMS1000 family - TMS1000C
- TODO:
- - add TMS1200C (has L input pins like TMS1600)
+TMS1000 CMOS versions (3-level stack, HALT pin)
+- RAM at top-left, ROM at top-right(rotate CCW)
+- ROM ordering is different:
+ * row select is linear (0-63)
+ * bit select is 7-0 instead of 0-7
+ * page select doesn't flip in the middle
+- 32-term mpla at bottom-right, different order
+- 32-term opla at bottom-left, ordered O7-O0(0 or 1), and A8,4,2,1,S
+
+TODO:
+- add TMS1200C (has L input pins like TMS1600)
*/
#include "emu.h"
#include "tms1000c.h"
-// TMS1000 CMOS versions (3-level stack, HALT pin)
-// - RAM at top-left, ROM at top-right(rotate CCW)
-// - ROM ordering is different:
-// * row select is linear (0-63)
-// * bit select is 7-0 instead of 0-7
-// * page select doesn't flip in the middle
-// - 32-term mpla at bottom-right, different order
-// - 32-term opla at bottom-left, ordered O7-O0(0 or 1), and A8,4,2,1,S
+
+// device definitions
DEFINE_DEVICE_TYPE(TMS1000C, tms1000c_cpu_device, "tms1000c", "Texas Instruments TMS1000C") // 28-pin SDIP, 10 R pins
-// device definitions
-tms1000c_cpu_device::tms1000c_cpu_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
- : tms1000_cpu_device(mconfig, TMS1000C, tag, owner, clock, 8 /* o pins */, 10 /* r pins */, 6 /* pc bits */, 8 /* byte width */, 2 /* x width */, 10 /* prg width */, address_map_constructor(FUNC(tms1000c_cpu_device::program_10bit_8), this), 6 /* data width */, address_map_constructor(FUNC(tms1000c_cpu_device::data_64x4), this))
-{
-}
+tms1000c_cpu_device::tms1000c_cpu_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) :
+ tms1000_cpu_device(mconfig, TMS1000C, tag, owner, clock, 8 /* o pins */, 10 /* r pins */, 6 /* pc bits */, 8 /* byte width */, 2 /* x width */, 3 /* stack levels */, 10 /* rom width */, address_map_constructor(FUNC(tms1000c_cpu_device::rom_10bit), this), 6 /* ram width */, address_map_constructor(FUNC(tms1000c_cpu_device::ram_6bit), this))
+{ }
// machine configs
void tms1000c_cpu_device::device_add_mconfig(machine_config &config)
{
// microinstructions PLA, output PLA
- PLA(config, "mpla", 8, 16, 32).set_format(pla_device::FMT::BERKELEY);
- PLA(config, "opla", 5, 8, 32).set_format(pla_device::FMT::BERKELEY);
+ PLA(config, m_mpla, 8, 16, 32).set_format(pla_device::FMT::BERKELEY);
+ PLA(config, m_opla, 5, 8, 32).set_format(pla_device::FMT::BERKELEY);
}
// microinstructions decode (different order, no active-negative)
-u32 tms1000c_cpu_device::decode_micro(u8 sel)
+u32 tms1000c_cpu_device::decode_micro(offs_t offset)
{
const u32 md[16] = { M_AUTY, M_AUTA, M_STSL, M_NE, M_C8, M_CIN, M_CKP, M_YTP, M_MTP, M_NATN, M_CKN, M_MTN, M_ATN, M_15TN, M_CKM, M_STO };
- u16 mask = m_mpla->read(sel);
+ u16 mask = m_mpla->read(offset);
u32 decode = 0;
for (int bit = 0; bit < 16; bit++)