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Posts Tagged ‘sid emulation’

ARM2SiD by Nobomi New Firmware v3.6

June 10th, 2019 No comments

A new firmware update for the ARM2SiD has been released by Nobomi.

News features and fixes in FW 3.6:

  • Compared to version 3.5, a quick response in stereo mode was added (when using a second socket), the dual-mono mode is activated without timeout when both socket is addressed in the same time.
  • Also upper addresses mapping is fixed in the update (sometimes misaligned address detection in the update application).
  • The “blind” FW 3.6 update updated without reading the registers during the update (especially useful if you have a problem with ARMSID detection)

Download:

If you have wired A5/A8 address lines, you can try 3SID files modified for D400h, D420h, and D500h addresses.

source: dzi.n.cz/8bit/arm2sid

Categories: Firmware, News & Rumors, Today

ARMSiD by Nobomi New Firmware v2.9

April 18th, 2019 No comments

A new firmware update for the ARMSiD has been released by Nobomi.

News features and fixes in FW 2.9:

  • A longer time is required to activate the reset signal (some issue with board 250407 reported where can be short spikes on the bus, now fixed).
  • Small fix in noise generator on the lowest bits. Also faster computing.
  • Other speed and code size optimization.

Download: ARMSiD v2.9 (69)

source: dzi.n.cz/8bit/armsid

Categories: Firmware, News & Rumors, Today

fpgaSID by andi6510 New Firmware ver. 0A

February 26th, 2019 No comments

A new firmware update for the fpgaSID has been released by andi6510.

Below the changelog taken directly from the website.

Main changes:

  • New 6581 bias setting range and curve. Per default the bias is now tuned to a brighter sound which is the most audible difference to revision 09.
  • Some further improvements on the 6581 filters.

New Features:

  • LEDs can be switched off now.
  • The outputs can be switched to a mix of both SIDs allowing mono setups with a single speaker.
  • The firmware flashing procedure has been improved to increase the success rate.
  • FPGASID is now compatible to the EasyFlash 3 module.

Note:

  • Important! Before updating the firmware, please read the documentation on flashing in the ConfiGuru manual.

Download: fpgaSID Firmware ver. 0A (101)

source: fpgasid.de

ARMSiD by Nobomi New Firmware v2.8 & New PCB rev.

February 21st, 2019 No comments
ARMSid New PCB rev

Nobomi has made a new revision of the ARMSiD PCB which however has the same hardware features as the previous one.

A new firmware update for the ARMSiD has also been released by Nobomi.

Below is the changelog taken directly from the website.

Differences between FW 2.8 and previous version:

  • The start and the end of the bus data cycle (reading or writing) is now controlled by signal CS only (it was the same on the beginning of the cycle, but the end was controlled by 02 clock before), it can help with a bus stability in other systems than C64 a C128.
  • Internal frequency generators are updated with precision of one 02 clock – about 1us (no audio signal phase changes after frequency retuning) !
  • Correct polarity of the bandpass filter.
  • Added emulation of internal filter voltage offset.
  • Added the “Digi Boost” feature by software – an effect similar to adding 330kOhm resistor between EXTin and GND on the MOS8580.
  • Other speed optimization.

Gallery:

Download: ARMSiD v2.8 (17/2/2019) (101)

source: dzi.n.cz/8bit/armsid

ARMSiD (6581/8580 Replacement) by Nobomi

November 6th, 2018 1 comment
ARMSid (6581/8580 Replacement) by Nobomi

ARMSid (6581/8580 Replacement) by Nobomi.

I could not resist the temptation to try also this emulation of the SID 6581/8580 with the STM32F410 ARM Cortex M4, i’m talking about the ARMSid by Nobomi.

The fast shipping and the courtesy of Nobomi are certainly very well but also the packaging, the ARMSid is shipped in a plastic case to avoid any problem with the shipping.

The sound and the “audio” feeling are good like the SwinSID Ultimate but better, personally i would place the ARMDSid between the Original SID and the SwinSID Ultimate, Nobomi you have made a very good job. Congratulations.

Nobomi also wrote a software for Commodore 64 to configure the various ARMSid options and another software to update the Firmware.

Some information taken from the Nobomi site:

What is it ?:

  • A new replacement of the MOS6581 and MOS8580 used in the Commodore C64. It is minimalistic (in simplicity of circuit and use, not in function and power).
  • Real “plug & play” solution. Just insert instead of the original SID into the slot and it’s done.
  • It determines (through supply voltages) which chip it replaces and starts the appropriate emulation (it can be changed later in software).
  • No need to switch the PAL / NTSC version, the circuit uses directly the clock from the computer bus, always synchronous with the C64.
  • It also emulates analog inputs (joysticks, mouse, etc. – POTX and POTY inputs)
  • Analog output is sufficiently buffered, it is not necessary to change anything on the computer board for proper operation.
  • Output sampling frequency is 1/16th bus clock of C64 (approx. 62kHz), real 12bit D/A converter, no pwm.
  • Filters completely transferred to digital form, emulated by float point arithmetic.
  • Significantly lower noise level and less interference from the power supply than the original :)
  • Lower power consumption than the original.
  • Firmware update possible inside the C64.
  • Emulates all waveforms, and even “samples” (at least some of them, Ghostbusters laugh, Chimera screams at you).
  • Full support of analog filters (LowPass, BandPass, HighPass, combination, Q quality control).
  • Emulation of OSC3 and ENV3 registers (little delay, approximately 16 clocks of the C64 bus).
  • Joysticks and mice work.

What is inside ?:

  • A few resistors, capacitors, one stabilizer, one opamp and a processor. That’s all, parts only from one side.
  • The only programmable circuit is the STM32F410, ARM Cortex M4 with HW float point arithmetic at 100MHz.
  • Analogue output amplified via the AD8515 opamp.
  • Stabilizer for the 3.3V processor, the processor itself has 5V tolerance inputs.

Firmware:

  • New features in FW 2.6:
  • Optimization for speed again (approx. 10ns more faster response to read registers, faster processing of writing registers).
  • New features in FW 2.5:
  • Again faster interrupt (approx. 10ns more faster response to read registers).
  • New features in FW 2.4:
  • Further optimization of the interrupt (approx. 20ns faster response to read registers).
  • New features in FW 2.3:
  • A part of source code (interrupt routine) has been rewritten in assembler and manually optimized.
  • It makes a possibility to control the bus only through the CS signal (no need for O2 clock synchronization, so it can run on systems with a different CPU than MOS6502 now).
  • Low frequency limit and filter strength settings and saving settings to permanent flash memory.

Gallery:

Download:

ARMSiD Video:

source: ARMSiD Homepage

Categories: Hardware, News & Rumors, Today

SwinSID Ultimate (6581/8580 Replacement) by CodeKiller & Hermit

May 25th, 2018 No comments
SwinSID Ultimate (SID 6581/8580 Replacement) by CodeKiller & Hermit

I tried the SwinSID Ultimate (SID 6581/8580 Replacement) by CodeKiller & Hermit and the base work by Swinkels with a Commodore 64 and the Ultimate-64 by Gideon and i must say that it works well without any problem.

The sound and the feel is good and knowing many SID tunes i did some comparisons, i can only say that these two Hungarian guys have done a Great job.

Forget immediatly how sounded the old Swinsid.

Some information taken from the SwinSID Ultimate site:

A duo from Hungary, Máté “CodeKiller” Sebők and Mihály “Hermit” Horváth have been working on improving SwinSID, originally developed by Swinkels.

List of improvements:

It has full feature compatibility with the original SID (over the old SwinSID):

  • paddle/mouse support.
  • readable registers (OSC3/ENV3)
  • external audio in.
  • bitfade.
  • proper ADSR-bug support.
  • fast ADSR attack rate (thanks to the self-correcting rate-counter)
  • ‘Lazy Jones’ and ‘180’ -like gate and test-bit workaround (no missing note)
  • proper 23bit noise-waveform calculation –> better “random” numbers.
  • full 3V p-p output range w/o 1KOhm load (same as 8580)
  • improved filter quality (16bit) and resonance-table for both SID model.
  • improved waveform calculation (full 16 bit)
  • high resolution combined waveform-tables.

It has enhancements over the original SID:

  • clean anti-aliased bandlimited sound at high pitches.
  • undistorted mixed digi tunes and eliminated volume-change click thanks to AC/DC separation of master volume register.
  • Softconfig — software configurable options for a number of aspects of the operation.
  • LEDs which intensity represents the active channels volume.
  • LED displaying the active (classic) digi playback.
  • or in case of the new Mahoney-digi, the entire array acts like a VU-meter.

Software configuration options:

  • change between 8580/6581 behaviour (filter, ADSR, combined waveforms)
  • change between PAL/NTSC pitch.
  • enable/disable external audio input (less external noise)
  • if enabled, then CAN be enabled to sample trough OSC3 register.
  • enable/disable startup “ding”(beep)
  • upload 3 banks of 256 bytes custom waveforms.
  • “transparent” mute for channels — does not affect the sync, OSC3/ENV3,..

Gallery:

Download:

SwinSID Ultimate Video:

Categories: Hardware, News & Rumors, Today