1chipMSX hacker KdL has been updating the OCM's software quite a bit in the past few years. And now, after 2 years of development, he gives us as an early christmas gift and just released version 3.2 of the firmware. The updated firmware can be used for the the original 1chipMSX and the Korean Zemmix Neo. The OCM-EXTRA Pack and the OCM-SDBIOS Pack also have been updated to the latest and greatest version.
Here's an overview of the changes:
- Updated Switched I/O ports ($40-$4F) module to Revision 004.
- Updated documentation and DIP-SW User Manual in the [docs\] folder.
- Updated the [msxtools\] folder.
- New Hex-files 320kB from OCM-SDBIOS Pack v1.4 with MSX3 and Zemmix Neo logos.
- New IPL-ROM Revision 1.01(K) that loads fast the 320kB BIOS.
- New LFSR counter for RTC module and speed limiter for logo animation.
- New external clock rule, the toggles are limited to 5.37MHz for async mode.
- New ID "Machine Type" (0-15) for OCM, Zemmix Neo, Altera DE0/DE1, etc.
- New rules for LEDs and VGA luminance by machine type.
- Added port F4 support, also for Warm Reset function.
- Added PAL 50Hz support for VGA modes, by caro.
- Added RWIN and LWIN as alternatives to the space-bar, useful for the players.
- Added CPI(R)CPD(R) undocumented flags at T80 Core, by TobiFlex.
- Fixed the black screen event with MegaSD Off, by caro.
- Fixed various bug on H-Sync and V-Sync of VDP TH9958.
- Increased VRAM to 1024kB, a full control of 16 pages by 64kB is permitted.
- Increased the boot speed with CPU clock at 3.58MHz.
- Improved the hard reset rules and increased the stability of system.
- Restored SHIFT+UP/DOWN toggles to the original master volume.
- Replaced Pause key with Lights On/Off control to prevent any data corruption.
- Enabled the AUTO_RESOURCE_SHARING of Quartus II to get more LEs.
- Many PLDs in this package, choose your preferred from the [firmware\] folder.
Instructions on how to flash your 1chipMSX or Zemmix Neo can be found in the howto.txt in the download, along with recovery instructions in case something goes wrong and a short list of interesting notes and known issues.
Happy 1chipMSXing!
Relevant link: OCM-PLD Pack v3.2 by KdL
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