| Commit message (Collapse) | Author | Age | Files | Lines |
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LM3900 model 3 only has half the number of BJTs compared to model 1
but delivers comparable results for Money Money.
Model 3 follows the datasheet.
I left code for Model 0 and 2 in for educational reasons.
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- Align LM3900 pin names with other opamps
- Add a better voltage clamping model
- Add high precision model (disabled due to performance)
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empty tracks at the end used by HFE and DSK loaders for now
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improvements.
- fix MB3614 parameter
- Added VARCLOCK which derives step size from function
- optimized function handling in CS and VS
- fixed a bug in ppreprocessor
- add trunc to pfunction
- added opamp_amplification_curve to derive characteristic
amplification curve
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- Untie diode code
- Fix some typos
- add TYPE=2 opamp model which omits output voltage limitation
Useful for determining causes of non-convergence
- Fix MB3614 opamp parameters to match datasheet
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modelling. [Couriersud]
Added global NETLIST.DEFAULT_MOS_CAPMODEL parameter. Setting this to
zero disables using capitance modelling in mos models.
On a per mos device basis this can be achieved by adding CAPMODEL=0 to
the model definition, e.g. MOSFET(X, "NMOS(CAPMODEL=0)")
Improve MOSFET convergence by using log-stepping.
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This fixes a rounding issue in the ptime code. This bug surfaced when I
tested netlist with picosecond resolution in ptime.
This will have a small impact on every driver using netlist. For
breakout, it required to adjust the color overlay.
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This is a significant improvement to the MOS transistor model. It adds
modelling of the Meyer capacitance model.
This is a somewhat academic addition since the effects occur on a
nanosecond time scale and have a huge impact on performance. I plan to
make the capacitance model selectable. Both on a model level as well as
by introducing a global solver parameter.
The model delivers comparable results to LTSpice.
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This effectively reverts b380514764cf857469bae61c11143a19f79a74c5 and
c24473ddff715ecec2e258a6eb38960cf8c8e98e, restoring the state at
598cd5227223c3b04ca31f0dbc1981256d9ea3ff.
Before pushing, please check that what you're about to push is sane.
Check your local commit log and ensure there isn't anything out-of-place
before pushing to mainline. When things like this happen, it wastes
everyone's time. I really don't need this in a week when real work™ is
busting my balls and I'm behind where I want to be with preparing for
MAME release.
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This reverts commit c24473ddff715ecec2e258a6eb38960cf8c8e98e, reversing
changes made to 009cba4fb8102102168ef32870892438327f3705.
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- added MOSFET model. Currently capacitances are not modelled.
This is a 3-pin model (Bulk connected to Source) with provisions to
extend it to 4-pin at a later stage.
- Add a capacitor generic model which is charge conserving.
Switch netlist to use this model instead of constant capacity model.
- Start putting constants into a central place.
Please expect minor timing differences due to a different numerical
path.
The cmos inverter example illustrates the analog implementation of a
cmos inverter gate. These were used a lot back in the 70s/80s to
generate sinus waves. The model should also be able to better emulate
4066 analog switches.
The addition of a relatively simple capacitor model is planned at a
later stage.
Expect everything from the MOSFET model at the current stage. Wrong
results as well as convergence issues and crashes.
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dsk_dsk.cpp: Avoid segfault if double sided DSK image is loaded on si…
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sided disk device
MAME crashed if user was trying to load a dsk image with more heads or tracks than disk device supports.
Now the error 'Incompatible image format' is raised.
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Despite the overhead - two devices more per transistor - this addition
significantly reduces computing time on switching conditions by reducing
the needed Newton-Raphson loops dramatically.
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This is a first-order approximation of the output driving stage. A logic
output with appropriate family may be better but would add more
complexity.
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Now family parameter is actually used. Also fixed bugs in code using
this device.
gamemachine now creates sound at realistic pitch.
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-----------
Rebound [DICE team, Couriersud]
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- 80 column card with SDX in CP/M mode.
- ROM/RAM banking fixed for CP/M, and MTX500 now correctly detected.
- Support for Type 03 and Type 07 .mfloppy images.
- Added alternate MTX2 romset (German).
- Keyboard ROM now selected in Configuration.
- Quickload .RUN files.
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The interesting parts in datasheets are always those which are not
mentioned.
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Change the sign of go (or in other terms a12 and a21 matrix stencil
elements). This should make further optimization of matrix population
easier.
In addition hopefully improve the readability of the code by sacrifying
overloads for more verbose member names.
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