Introduction

This is a stable release (from the master branch).

(the previous stable release was 17th September 2021)

Improvements (Highlights)

• Offload some of the capure loop to the GPU
• Official Support for Pi Zero 2 W
• Fixes/improvements for Pi 1/2/3/4 (unsupported but should work)
• Single (universal) binary now used for Pi 0-3 models
• Fixes/Improvements to BBC Mode 7 calibration code
• Improvements to Genlock (limit slew rate when changing modes)
• Update to latest Raspberry Pi Foundation Firmware (fixes minor overvoltage issue on Pi Zero)

Additional Profiles

• ABC80 (a Swedish machine)
• Enterprise
• Intellivision
• NEC PC-98 (and Epson clones)

Detailed list of changes

Raw changes since last stable release are:

• c97f06ae Update Analog V3 board with changed component values from wiki
• 501286d5 Fix osd update for screencap and reboot warning
• 09f9671e Update mode7 rounding fix
• 954910b6 Update slew rate threshold
• 10b7ffd7 Restrict genlock slew rate when changing modes
• 51bc2013 Update profiles
• 420095e6 Fix double width capture
• bed18d76 Set top bits of screen buffer pointer correctly in 16bpp mode
• 50a253d8 Instruction reorder
• a048cbc6 Fix framebuffer logging and display_list_offset
• 6f155c59 Ensure top bits of frame buffer address match
• ab669cf7 Add missing blank files
• 08b22bfe Update firmware to latest stable
• 5561da7b Update config files to workaround unprogrammed otp zeros
• 1d9ef104 Update firmware to latest build with overvoltage fix
• 12ad6a79 Identify Pi zero and Pi 1 separately
• a6ad3464 Further fix of startup message
• dc16b862 Fix startup message in interlaced mode
• 6f8977b5 Fix overclock message
• 3465fd02 Downgrade firmware to 21-Apr-21 as recent firmware overvolts the core
• 4fdcb8e4 Fix powerup message not working on some configurations
• 367e88fe Update profiles
• a198cb14 Add batch files to switch between GPU and ARM capture
• d84104b9 Fix autocalibrate in teletext 12bpp mode
• 00f49a3f Fix screencap message
• a420b4b2 Fix OSD not displayed on screencaps in 4 & 8 bpp modes
• 2d838e73 use faster return ( faster for cortex a53)
• ef08fbec Revert high latency detection regression
• 7e25eb9f Update Enterprise profile
• d2e7bc36 Fix C128 profile
• 5141c2e9 update profiles
• 67999ebd Add intellivision profile
• cb42b5bb Rename to "Inverted composite"
• e7659edc Check clock rate change
• 726c588a Update config.txt files
• 4d1fcc63 Add option to lock to composite blanking instead of sync
• a9f22021 Add intellivision palette
• e3bc22d0 Fix regression that caused a hangup on double reboot
• b5a8701b Tweak instruction order
• bc4b925a Update firmware
• 5c306616 Filter out PaxHeader folders
• f4191539 Additional delays
• fb15690d Improve disable_overclock feature
• a0e88676 Increase delay before rebooting
• 6ab4b7f0 Fix display list issue stopping resolutions 1024x768 & lower from working at 16bpp
• d9b5671e Simplify high latency detection
• 86714bcc Update profiles
• 52ab7b60 Improve clock setting
• ba6c2bde Reduce number of psyncs to capture during preload
• 0ec5c461 Don't use high latency capture on Pi zero/w
• 23d870ff first cache preload has OSD bit set
• e94451f2 Add enterprise profile
• 148a04d7 Use same processor build options as Pi0-3 (ready to include Pi4 in universal binary)
• 0039079e Reduce logging messages during mode change
• d879a81a Workaround for SD Card Initialization bug on Pi 4 (#253)
• cab728b6 Fix heap corruption bug when sd_card_init() fails (#253)
• 21833448 Fix 10.3 compiler string warnings
• 33d4b1dc Increase size of supervisor stack (RGBtoHDMI runs in supervisor)
• 92eca231 Improve handling of PLLD as sampling clock on Pi4
• aee35498 Fix build warnings
• 912e8e11 Update genlock to work on Pi 4
• bf2b4854 Fix display of refresh rate
• 965882bc Add eceute permissions to configure_rpiA4.sh
• be87cba7 temporarily disable screencaps on Pi 4
• 2731fd16 Improve refresh rate reporting
• 8e5ce6a8 Disable unaligned access (may not work across armv6-v8 on same binary)
• 171fff3d Update lodepng
• 9dfcd669 Update 1600x1200@50Hz definition to use specific timing rather than CVT (Fixes glitch in rpi4)
• 607b7d89 Revert to PLLD and change core divider as well as per divider
• ef330cab Add set_clock_rate
• d1f47014 Use PLLC on Pi 4
• 006c117a Improve speed of peripheral address reads
• b4b5fc17 Align png buffers
• 01356865 Further prediv fix
• d2cca8a3 fix prediv not present on pi4
• f464205a Dont overclock core on Pi4 unless >100Mhz
• c1a30a67 Update 16bpp display list manipulation code to cope with BCM2711 (Pi4)
• ad85656d Remove EMMC_DEBUG from default debug build (delays bootup significantly)
• 8dd19607 Update horizontal resolution for Pi4
• 2fc9014f Add clock IDs
• adc1032f Update ARM build limits
• 31ca5393 Update build options
• 0014d5be Add build option for ARM capture on Pi4 and add ARM version of config.txt
• 925b345d Update Arm build options and old CPLD folders
• 8a99ef79 Add support for old CPLDs on GPU capture
• 198c023c Update Arm conditional build options
• abdcaeba Fix conditional compilation
• 1344b380 Fix build scripts
• eb8533c0 Update defs for Pi 4
• 37db5bf4 Update overclock limits for various Pi models
• f36f1946 Add high latency capture option in GPU mode (slightly faster but only suitable for 9/12bpp)
• b246f194 Improve mode7 auto calibration range + add auto overclock option for Pi 2 & 3
• 5ea5bfb3 Final part of universal binary conversion
• d5201656 Update scripts
• ee2d739e Update profiles
• 6ce9724d Second part of universal binary conversion
• 60453dce First part of universal binary (Pi0,1,2,3) conversion
• 05b649fe Change assembly code to use variable peripheral base
• 8d65fb04 Change sdcard to use variable peripheral base
• c295151e Change C code to use variable peripheral base
• 9733f11a Try x12 multiplier in mode7 calibration if either errors or window errors are non zero
• 3b6ad220 Merge Pi2 and Pi3 support into one binary
• ff5cfe66 Fix garbage on right hand of screen in teletext mode with GPU capture
• 8d0ca8bd Added NEC PC-98 and Epson clones profiles.
• 24658f12 Added a profile for the Swedish computer ABC80
• a9d39705 Read start of screen from mailbox when setting cached area
• 208be4cb Update cached screen
• c0402a62 Fix permissions on configure_rpiA.sh
• 5c798a6e Fix Pi2 screen start
• 01ed2790 Update configure_pll
• 3e065e38 Fix pll calculation on Pi4
• b008efbf Fix RAM speed value
• af49a63f Workarounds to get Pi4 running on PLLA
• 4b939cfc Fix Pi4 SD card not working
• e64eace5 Update config.txt
• ba874694 Update defaults in Amiga CPLD
• 45370488 Add videocore build script
• 29c1b7bb Simplify font selection
• e3e48e95 Update profiles
• c90b12ce Re-order some instructions in SKIP_PSYNC
• 62368d1a Run old CPLDs on ARM build only
• 9fb5b05c Update line timeout
• 7e3ff3fa Re-add cache preload in in band signalling
• 1cfb7930 Include Sam Coupe in hidden profiles list
• fbc542cd remove remaining support for very old CPLDs in GPU build
• d168b7eb Add build info to bootup message
• d5ad4307 Fix issue with cache preload on GPU build
• 4405c280 Run Arm capture on Pi 1
• 85986ca0 tweak pipelining
• 8124a828 Add arm capture build option
• 744a0424 Update RPI2 support
• 7b1176d8 Optimise MBOX reading code
• 51153255 Mark all samples with FINAL_BIT at end of capture
• f4da3234 Fix stall issue with 12bpp capture into an 8bpp frame buffer
• a6f8fbee Update videocore comments
• c55af866 Improve benchmarks
• cb3eaee6 Add GPU capture for Pi zero and Pi zero 2W
• 19d63b76 Update overclock limits for Pi zero 2
• 8216d26c Update mailbox interface for GPU
• 1231e358 Update NTSC capture for GPU
• efcb1232 Update mode7 capture for GPU
• a9bdd084 Update in band capture for GPU
• ec1e3a79 Add default 9bpp & 1bpp simple modes
• 8e4797f3 GPU videocore capture source
• 9a1b1b0a Add vasm assembler for videocore IV
• 4f4a5a93 Update display of window info
• 0ef322c9 Fix calibration display
• c9690050 Improve calibration window handling and display window errors
• 4e64f139 Fix issue with osd update during CPLD programming on Pi zero 2W
• 61494c94 Prioritise 3 wide zero error window over single zero error ( issue #247 )
• 46d76969 Exclude Sam Couple from zero 2W profile filter
• dac13f6c Update Pi zero2W warning message
• cf2477ea Capture loop code optimisation from dp11
• e7f96b7e Fix Atari 800 double width sample count
• 31228ffb Optimise Pi zero 2 capture code and modify warning
• b949669d Cache part of screen memory on Pi zero 2 and update mode7 deinterlace to use it
• 67d6c48f Fix double width NTSC issue
• 37daa5dd Add GPIO benchmark
• 90ee1f85 Update multicore capture to work with all capture loops
• c493d210 fix assembly warnings
• 5c0bc8c9 Further updates to config.txt
• a468d410 Remove unused source files
• 8f9942a2 Temporarily hide 9bpp & 12bpp profiles that don't work on Pi zero 2
• ca263ba9 Update config.txt for Pi zero 2W support
• 90da0b61 Update Pi boot files for Pi zero 2W support
• 2bd01ee0 Interlace detection only when Interlaced video or sync selected unless BBC mode
• eced2ee5 Add 9bpp and 1bpp support for simple mode
• 72ba3640 Added NEC PC-98 and Epson clones profiles.
• 129d90e5 Update ABC80.txt