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had a look at the datasheet, the dumps look fine to me

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Michaël Banaan Ananas 2014-08-05 22:20:49 +00:00
parent 8747f3a9ab
commit ec0a11fb91
2 changed files with 12 additions and 9 deletions
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13
src/emu/machine/rp5h01.c
View File

@ -1,10 +1,12 @@
/***************************************************************************
RP5H01 - Ricoh 64x1bit PROM with 6/7-bit counter
RP5H01 - Ricoh 64x1bit(+8bit) PROM with 6/7-bit counter
TODO:
- follow the datasheet better (all dumps presumably needs to be redone
from scratch?)
In reality, PROM data is 72bits (64 + 8bit 'dummy'). In 7-bit counter mode,
from 64 to 127 (%1000000 to %1111111), the dummy bits are read repeatedly,
with a mask of %1010111. For example if the 8 dummy bits are $7c,
bits 64 to 127 are read as $7c $7c $00 $00 $7c $7c $00 $00.
To simplify this, our emulation expects 'overdumps', 128bits total.
***************************************************************************/
@ -39,6 +41,7 @@ void rp5h01_device::device_config_complete()
void rp5h01_device::device_start()
{
assert(region()->bytes() == 0x10);
m_data = *region();
/* register for state saving */
@ -58,7 +61,7 @@ void rp5h01_device::device_reset()
m_counter = 0;
m_counter_mode = COUNTER_MODE_6_BITS;
m_enabled = 0;
m_old_reset = -1;
m_old_reset = 0;
m_old_clock = 0;
}

8
src/emu/machine/rp5h01.h
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@ -1,15 +1,15 @@
/***************************************************************************
RP5H01 - Ricoh 64x1bit PROM with 6/7-bit counter
RP5H01 - Ricoh 64x1bit(+8bit) PROM with 6/7-bit counter
****************************************************************************
___________
DATA 1 |* | 8 COUNTER OUT
| |
| |
_CE/Vpp 2 | RP5H01 | 7 RESET
| RF5H01 |
| RF5H01 |
Vcc 3 | | 6 DATA CLOCK
| |
| |
GND 4 |___________| 5 TEST
***************************************************************************/