update README

README.md

@@ -13,6 +13,7 @@ Requirements for building and debugging firmware
 * Software
   * [Altera Quartus II + Cyclone IV support](http://dl.altera.com/?edition=lite) (v 16.1 or higher - free Lite Edition suffices)
   * [RISC-V GNU Compiler Toolchain](https://github.com/riscv/riscv-gnu-toolchain)
+  * [Picolibc library for RISC-V](https://github.com/picolibc/picolibc)
   * GCC (or another C compiler) for host architecture (for building a SD card image)
   * Make
   * [iconv](https://en.wikipedia.org/wiki/Iconv) (for building with JP lang menu)
@@ -20,19 +21,14 @@ Requirements for building and debugging firmware
 
 Architecture
 ------------------------------
-* [Reference board schematics](https://github.com/marqs85/ossc_pcb/raw/v1.6/ossc_board.pdf)
+* [Reference board schematics](https://github.com/marqs85/ossc_pcb/raw/v1.8/doc/ossc_board.pdf)
 * [Reference PCB project](https://github.com/marqs85/ossc_pcb)
 
 
 SW toolchain build procedure
 --------------------------
-1. Download, configure, build and install RISC-V toolchain with Newlib + RV32EMC support:
+1. Download and install RISC-V GNU toolchain and Picolibc
-~~~~
+
-git clone --recursive https://github.com/riscv/riscv-gnu-toolchain
-cd riscv-gnu-toolchain
-./configure --prefix=/opt/riscv --with-arch=rv32emc --with-abi=ilp32e
-sudo make    # sudo needed if installing under default /opt/riscv location
-~~~~
 2. Compile custom binary to IHEX converter:
 ~~~~
 gcc tools/bin2hex.c -o tools/bin2hex
@@ -51,9 +47,10 @@ git submodule update --init --recursive ip/pulpino_qsys
     * Load platform configuration (sys.qsys)
     * Generate output (Generate -> Generate HDL, Generate)
     * Close Platform Designer
+    * Run "patch -p0 <scripts/qsys.patch" to patch generated files to optimize block RAM usage
     * Run "touch software/sys_controller_bsp/bsp_timestamp" to acknowledge QSYS update
 3. Generate the FPGA bitstream (Processing -> Start Compilation)
-4. Ensure that there are no severe timing violations by looking into Timing Analyzer report
+4. Ensure that there are no timing violations by looking into Timing Analyzer report
 
 NOTE: If the software image (software/sys_controller/mem_init/sys_onchip_memory2_0.hex) was not up to date at the time of compilation, bitstream can be quickly rebuilt with updated hex by running "Processing->Update Memory Initialization File" and "Processing->Start->Start Assembler" in Quartus.
 

ossc.sdc

@@ -52,8 +52,9 @@ foreach_in_collection c [get_clocks pclk_*_out] {
 }
 set_false_path -to [remove_from_collection [all_outputs] $critoutputs_hdmi]
 
-# Lumacode
+# Lumacode (constrained to max. 60MHz sampling)
-set_false_path -from [get_clocks pclk_tvp_high] -through [get_cells tvp7002_frontend:u_tvp_frontend|lc_code*]
+set_max_delay 16.6 -from [get_clocks pclk_tvp_high] -through [get_cells tvp7002_frontend:u_tvp_frontend|lc_code*]
+set_max_delay 16.6 -from [get_clocks pclk_tvp_high] -through [get_cells u_tvp_frontend|lc_atari_*]
 
 
 ### CPU/scanconverter clock relations ###

rtl/tvp7002_frontend.v

@@ -100,6 +100,8 @@ reg [1:0] lc_code[1:4];
 reg [2:0] lc_ctr;
 reg [2:0] lc_cnt;
 reg [2:0] lc_emp_nes;
+reg [3:0] lc_atari_hue, lc_atari_luma;
+reg lc_atari_ctr;
 
 // Measurement registers
 reg [20:0] pcnt_frame_ctr;
@@ -145,8 +147,8 @@ wire HSYNC_i_np = (HSYNC_i ^ ~hsync_i_pol);
 wire [3:0] H_SKIP = hv_in_config3[27:24];
 wire [3:0] H_SAMPLE_SEL = hv_in_config3[31:28];
 
-// Lumacode uses 2 samples for {C64, C128, VIC20, Spectrum, TMS99xxA}, 3 samples for NES, 4 samples for VCS and 6 samples for Atari 8bit
+// Lumacode uses 2 samples for {C64, C128, VIC20, Spectrum, TMS99xxA}, 3 samples for NES, 6 samples for Atari 8bit (3 per pixel) and 4 samples for VCS (2 per half-pixel)
-wire [2:0] LC_SAMPLES = (MISC_LUMACODE_MODE <= 3) ? 2 : ((MISC_LUMACODE_MODE <= 4) ? 3 : ((MISC_LUMACODE_MODE <= 5) ? 4 : 6));
+wire [2:0] LC_SAMPLES = (MISC_LUMACODE_MODE <= 3) ? 2 : ((MISC_LUMACODE_MODE <= 5) ? 3 : 2);
 wire [2:0] LC_H_SKIP = ((H_SKIP+1) / LC_SAMPLES) - 1;
 
 // Lumacode palettes for 2-sample index-based sources (C64, Spectrum, Coleco/MSX)
@@ -164,6 +166,44 @@ wire [7:0] lumacode_data_3s_R = lumacode_data_3s[{lc_code[1], lc_code[2], lc_cod
 wire [7:0] lumacode_data_3s_G = lumacode_data_3s[{lc_code[1], lc_code[2], lc_code[3]}][15:8];
 wire [7:0] lumacode_data_3s_B = lumacode_data_3s[{lc_code[1], lc_code[2], lc_code[3]}][7:0];
 
+// Lumacode palette Atari GTIA
+wire [23:0] lumacode_data_gtia[0:255] = '{
+24'h000000, 24'h111111, 24'h222222, 24'h333333, 24'h444444, 24'h555555, 24'h666666, 24'h777777, 24'h888888, 24'h999999, 24'haaaaaa, 24'hbbbbbb, 24'hcccccc, 24'hdddddd, 24'heeeeee, 24'hffffff,
+24'h091900, 24'h192806, 24'h29370d, 24'h3a4714, 24'h4a561b, 24'h5a6522, 24'h6b7529, 24'h7b8430, 24'h8c9336, 24'h9ca33d, 24'hacb244, 24'hbdc14b, 24'hcdd152, 24'hdee059, 24'heeef60, 24'hffff67,
+24'h300000, 24'h3d1108, 24'h4b2211, 24'h593319, 24'h674422, 24'h75552a, 24'h826633, 24'h90773b, 24'h9e8844, 24'hac994c, 24'hbaaa55, 24'hc7bb5d, 24'hd5cc66, 24'he3dd6e, 24'hf1ee77, 24'hffff80,
+24'h4b0000, 24'h570f0c, 24'h631e18, 24'h6f2e24, 24'h7a3d30, 24'h874d3c, 24'h935c49, 24'h9f6b55, 24'hab7b61, 24'hb68a6d, 24'hc39a79, 24'hcfa986, 24'hdbb892, 24'he6c89e, 24'hf3d7aa, 24'hffe7b7,
+24'h550000, 24'h600e10, 24'h6b1c21, 24'h772a32, 24'h823843, 24'h8d4654, 24'h995465, 24'ha46276, 24'haf7187, 24'hbb7f98, 24'hc68da9, 24'hd19bba, 24'hdda9cb, 24'he8b7dc, 24'hf3c5ed, 24'hffd4fe,
+24'h4c0047, 24'h570d53, 24'h631b5f, 24'h6f286b, 24'h7b3678, 24'h874384, 24'h935190, 24'h9f5e9c, 24'hab6ca9, 24'hb779b5, 24'hc387c1, 24'hcf94cd, 24'hdba2da, 24'he7afe6, 24'hf3bdf2, 24'hffcbff,
+24'h30007e, 24'h3b0b85, 24'h49198d, 24'h572796, 24'h65349f, 24'h7242a7, 24'h8050b0, 24'h8e5db8, 24'h9c6bc1, 24'ha979c9, 24'hb786d2, 24'hc594db, 24'hd3a2e3, 24'he0afec, 24'heebdf4, 24'hfccbfd,
+24'h0a0097, 24'h1a0e9d, 24'h2a1da4, 24'h3b2cab, 24'h4b3ab2, 24'h5b49b9, 24'h6c58c0, 24'h7c67c7, 24'h8c75ce, 24'h9c84d5, 24'had93dc, 24'hbda2e3, 24'hceb0ea, 24'hdebff1, 24'heecef8, 24'hffddff,
+24'h00008e, 24'h0c0d94, 24'h1b1e9c, 24'h2a2ea3, 24'h393eab, 24'h484eb2, 24'h575eba, 24'h666ec1, 24'h747ec9, 24'h838fd0, 24'h929fd8, 24'ha1afdf, 24'hb0bfe6, 24'hbfcfee, 24'hcedff5, 24'hddeffd,
+24'h000e64, 24'h0c1e6e, 24'h192e78, 24'h263e83, 24'h324e8d, 24'h3f5e97, 24'h4c6ea2, 24'h587eac, 24'h658eb6, 24'h729ec1, 24'h7eaecb, 24'h8bbed5, 24'h98cee0, 24'ha4deea, 24'hb1eef4, 24'hbeffff,
+24'h002422, 24'h09302e, 24'h153f3d, 24'h204d4c, 24'h2c5c5a, 24'h376a69, 24'h427978, 24'h4e8786, 24'h599695, 24'h65a4a4, 24'h70b3b2, 24'h7cc1c1, 24'h87d0d0, 24'h92dfde, 24'h9eeded, 24'ha9fcfc,
+24'h003200, 24'h0b3f0e, 24'h164d1c, 24'h225b2b, 24'h2d6839, 24'h397648, 24'h448456, 24'h509164, 24'h5b9f73, 24'h67ad81, 24'h72ba90, 24'h7ec89e, 24'h89d6ac, 24'h95e3bb, 24'ha0f1c9, 24'hacffd8,
+24'h003400, 24'h0c410a, 24'h194f14, 24'h265c1e, 24'h336a28, 24'h407732, 24'h4c853c, 24'h599246, 24'h66a050, 24'h73ad5a, 24'h80bb64, 24'h8cc86e, 24'h99d678, 24'ha6e382, 24'hb3f18c, 24'hc0ff97,
+24'h002a00, 24'h0f3807, 24'h1e460e, 24'h2d5416, 24'h3c621d, 24'h4b7124, 24'h5a7f2c, 24'h698d33, 24'h799b3b, 24'h88a942, 24'h97b849, 24'ha6c651, 24'hb5d458, 24'hc4e260, 24'hd3f067, 24'he3ff6f,
+24'h0d1700, 24'h1d2606, 24'h2d350d, 24'h3d4514, 24'h4d541b, 24'h5d6422, 24'h6d7329, 24'h7d8330, 24'h8e9237, 24'h9ea23e, 24'haeb145, 24'hbec14c, 24'hced053, 24'hdee05a, 24'heeef61, 24'hffff68,
+24'h330000, 24'h401008, 24'h4e2111, 24'h5b321a, 24'h694323, 24'h77542c, 24'h846535, 24'h92763e, 24'h9f8646, 24'had974f, 24'hbba858, 24'hc8b961, 24'hd6ca6a, 24'he3db73, 24'hf1ec7c, 24'hfffd85};
+
+// Lumacode palette Atari CTIA/TIA
+wire [23:0] lumacode_data_ctia[0:127] = '{
+24'h000000, 24'h404040, 24'h6C6C6C, 24'h909090, 24'hB0B0B0, 24'hC8C8C8, 24'hDCDCDC, 24'hECECEC,
+24'h444400, 24'h646410, 24'h848424, 24'hA0A034, 24'hB8B840, 24'hD0D050, 24'hE8E85C, 24'hFCFC68,
+24'h702800, 24'h844414, 24'h985C28, 24'hAC783C, 24'hBC8C4C, 24'hCCA05C, 24'hDCB468, 24'hECC878,
+24'h841800, 24'h983418, 24'hAC5030, 24'hC06848, 24'hD0805C, 24'hE09470, 24'hECA880, 24'hFCBC94,
+24'h880000, 24'h9C2020, 24'hB03C3C, 24'hC05858, 24'hD07070, 24'hE08888, 24'hECA0A0, 24'hFCB4B4,
+24'h78005C, 24'h8C2074, 24'hA03C88, 24'hB0589C, 24'hC070B0, 24'hD084C0, 24'hDC9CD0, 24'hECB0E0,
+24'h480078, 24'h602090, 24'h783CA4, 24'h8C58B8, 24'hA070CC, 24'hB484DC, 24'hC49CEC, 24'hD4B0FC,
+24'h140084, 24'h302098, 24'h4C3CAC, 24'h6858C0, 24'h7C70D0, 24'h9488E0, 24'hA8A0EC, 24'hBCB4FC,
+24'h000088, 24'h1C209C, 24'h3840B0, 24'h505CC0, 24'h6874D0, 24'h7C8CE0, 24'h90A4EC, 24'hA4B8FC,
+24'h00187C, 24'h1C3890, 24'h3854A8, 24'h5070BC, 24'h6888CC, 24'h7C9CDC, 24'h90B4EC, 24'hA4C8FC,
+24'h002C5C, 24'h1C4C78, 24'h386890, 24'h5084AC, 24'h689CC0, 24'h7CB4D4, 24'h90CCE8, 24'hA4E0FC,
+24'h003C2C, 24'h1C5C48, 24'h387C64, 24'h509C80, 24'h68B494, 24'h7CD0AC, 24'h90E4C0, 24'hA4FCD4,
+24'h003C00, 24'h205C20, 24'h407C40, 24'h5C9C5C, 24'h74B474, 24'h8CD08C, 24'hA4E4A4, 24'hB8FCB8,
+24'h143800, 24'h345C1C, 24'h507C38, 24'h6C9850, 24'h84B468, 24'h9CCC7C, 24'hB4E490, 24'hC8FCA4,
+24'h2C3000, 24'h4C501C, 24'h687034, 24'h848C4C, 24'h9CA864, 24'hB4C078, 24'hCCD488, 24'hE0EC9C,
+24'h442800, 24'h644818, 24'h846830, 24'hA08444, 24'hB89C58, 24'hD0B46C, 24'hE8CC7C, 24'hFCE08C};
+
 // SOF position for scaler
 wire [10:0] V_SOF_LINE = hv_in_config3[23:13];
 
@@ -263,6 +303,7 @@ always @(posedge PCLK_i) begin
         lc_code[1] <= G_pp[1][7:6];
         lc_cnt <= 0;
         lc_ctr <= 0;
+        lc_atari_ctr <= (h_cnt == 0) ? 0 : lc_atari_ctr ^ 1'b1;
     end else if (lc_ctr == LC_H_SKIP) begin
         lc_code[2+lc_cnt] <= G_pp[1][7:6];
         lc_cnt <= lc_cnt + 1;
@@ -302,12 +343,31 @@ always @(posedge PCLK_i) begin
 
         if ((h_ctr == H_SAMPLE_SEL) & ({lc_code[1], lc_code[2], lc_code[3]} < 8))
             lc_emp_nes <= {lc_code[2][0], lc_code[3]};
-    // TODO: Lumacode VCS
+    // Lumacode Atari GTIA
     end else if (MISC_LUMACODE_MODE == 5) begin
-        {R_pp[2], G_pp[2], B_pp[2]} <= '0;
+        if (h_ctr == H_SAMPLE_SEL) begin
-    // TODO: Lumacode Atari 8-bit
+            if (lc_atari_ctr) begin
+                // Store hue and luma (high bits) for 1st pixel, and display last pixel of previous pair
+                lc_atari_hue <= {lc_code[1], lc_code[2]};
+                lc_atari_luma[3:2] <= lc_code[3];
+                {R_pp[2], G_pp[2], B_pp[2]} <= lumacode_data_gtia[{lc_atari_hue, lc_atari_luma}];
+            end else begin
+                // Store luma for 2nd pixel, and display first pixel of current pair
+                lc_atari_luma <= {lc_code[2], lc_code[3]};
+                {R_pp[2], G_pp[2], B_pp[2]} <= lumacode_data_gtia[{lc_atari_hue, lc_atari_luma[3:2], lc_code[1]}];
+            end
+        end
+    // Lumacode Atari VCS
     end else begin
-        {R_pp[2], G_pp[2], B_pp[2]} <= '0;
+        if (h_ctr == H_SAMPLE_SEL) begin
+            if (lc_atari_ctr) begin
+                // Store first 2 lumacode samples (hue) from double-sampled input (160col->320col)
+                lc_atari_hue <= {lc_code[1], lc_code[2]};
+            end else begin
+                // Display pixel after receiving remaining 2 lumacode samples (luma)
+                {R_pp[2], G_pp[2], B_pp[2]} <= lumacode_data_ctia[{lc_atari_hue, lc_code[1], lc_code[2][1]}];
+            end
+        end
     end
 
     HSYNC_pp[2] <= HSYNC_pp[1];

scripts/reprogram.sh

@@ -1,5 +1,6 @@
 #!/bin/sh
 
+jtagconfig
 make rv-reprogram
 
 if [ $# -eq 1 ] && [ $1 = "jtag_uart" ] && [ $(pgrep -c nios2-terminal) = 0 ]; then

software/sys_controller/Makefile

@@ -190,7 +190,7 @@ CREATE_ELF_DERIVED_FILES := 0
 CREATE_LINKER_MAP := 1
 
 # Common arguments for ALT_CFLAGSs
-APP_CFLAGS_DEFINED_SYMBOLS :=
+APP_CFLAGS_DEFINED_SYMBOLS := -DPICOLIBC_INTEGER_PRINTF_SCANF
 ifeq ($(ENABLE_AUDIO),y)
 APP_CFLAGS_DEFINED_SYMBOLS += -DENABLE_AUDIO
 endif
@@ -216,6 +216,7 @@ SYS_LIB :=
 BSP_ROOT_DIR := ../sys_controller_bsp/
 
 # List of application specific include directories, library directories and library names
+APP_INCLUDE_DIRS += /usr/lib/picolibc/riscv64-unknown-elf/include
 APP_INCLUDE_DIRS += it6613
 APP_INCLUDE_DIRS += tvp7002
 APP_INCLUDE_DIRS += ths7353
@@ -396,7 +397,7 @@ APP_ASFLAGS := $(APP_ASM_INC_DIRS) \
                $(ASFLAGS)
 
 # Arguments only for the linker.
-APP_LDFLAGS := $(APP_LDFLAGS_USER) --specs=nano.specs -nostartfiles
+APP_LDFLAGS := $(APP_LDFLAGS_USER) --specs=picolibc.specs -nostartfiles
 
 ifneq ($(LINKER_SCRIPT),)
 APP_LDFLAGS += -T'$(LINKER_SCRIPT)'
@@ -657,11 +658,11 @@ build_post_process :
 # included makefile fragment.
 #
 ifeq ($(DEFAULT_CROSS_COMPILE),)
-DEFAULT_CROSS_COMPILE := riscv32-unknown-elf-
+DEFAULT_CROSS_COMPILE := riscv64-unknown-elf-
 endif
 
 ifeq ($(DEFAULT_STACKREPORT),)
-DEFAULT_STACKREPORT := riscv32-unknown-elf-size
+DEFAULT_STACKREPORT := riscv64-unknown-elf-size
 endif
 
 ifeq ($(DEFAULT_DOWNLOAD),)
@@ -715,7 +716,7 @@ AR := $(CROSS_COMPILE)ar
 endif
 
 ifeq ($(origin LD),default)
-LD := $(CROSS_COMPILE)g++
+LD := $(CROSS_COMPILE)gcc
 endif
 
 ifeq ($(origin RM),default)
@@ -760,7 +761,7 @@ ifeq ($(MKDIR),)
 MKDIR := $(DEFAULT_MKDIR)
 endif
 
-RV_OBJCOPY = riscv32-unknown-elf-objcopy
+RV_OBJCOPY = riscv64-unknown-elf-objcopy
 
 #------------------------------------------------------------------------------
 #                     PATTERN RULES TO BUILD OBJECTS

software/sys_controller/it6613/it6613_drv.c

@@ -3401,6 +3401,8 @@ SetGPInfoFrame(BYTE *pInfoFrameData)
         return ER_FAIL ;
     }
 
+    DISABLE_NULL_PKT();
+
     Switch_HDMITX_Bank(1) ;
 
     HDMITX_WriteI2C_Byte(REG_TX_PKT_HB00, (0x80+pInfoFrame->info.Type));

software/sys_controller/link.riscv.ld

@@ -2,6 +2,6 @@
 OUTPUT_ARCH(riscv)
 
 /* required to correctly link newlib */
-GROUP( -lc -lgloss -lgcc -lsupc++ )
+GROUP( -lc -lgcc )
 
 INCLUDE link.common.ld

software/sys_controller/ossc/av_controller.c

@@ -185,6 +185,7 @@ inline void TX_enable(tx_mode_t mode)
     SetAVMute(TRUE);
     DisableVideoOutput();
     EnableAVIInfoFrame(FALSE, NULL);
+    EnableGPInfoFrame(FALSE, NULL);
 
     //Setup TX configuration
     //TODO: set pclk target and VIC dynamically
@@ -192,8 +193,10 @@ inline void TX_enable(tx_mode_t mode)
 
     if (mode != TX_DVI) {
         HDMITX_SetAVIInfoFrame(vmode_out.vic, (mode == TX_HDMI_RGB) ? F_MODE_RGB444 : F_MODE_YUV444, 0, 0, tc.hdmi_itc, vm_conf.hdmitx_pixr_ifr);
-        HDMITX_SetHDRInfoFrame(tc.hdmi_hdr ? 3 : 0);
+        if (tc.hdmi_vrr)
-        HDMITX_SetVRRInfoFrame(tc.hdmi_vrr);
+            HDMITX_SetVRRInfoFrame(tc.hdmi_vrr);
+        if (tc.hdmi_hdr)
+            HDMITX_SetHDRInfoFrame(tc.hdmi_hdr ? 3 : 0);
         cm.cc.hdmi_itc = tc.hdmi_itc;
         cm.cc.hdmi_hdr = tc.hdmi_hdr;
         cm.cc.hdmi_vrr = tc.hdmi_vrr;
@@ -412,6 +415,9 @@ status_t get_status(tvp_sync_input_t syncinput)
     if (memcmp(&tc.col, &cm.cc.col, sizeof(color_setup_t)))
         tvp_set_gain_offset(&tc.col);
 
+    if (tc.full_vs_bypass != cm.cc.full_vs_bypass)
+        tvp_set_full_vs_bypass(tc.full_vs_bypass);
+
 #ifdef ENABLE_AUDIO
     if ((tc.audio_dw_sampl != cm.cc.audio_dw_sampl) ||
 #ifdef MANUAL_CTS
@@ -961,7 +967,7 @@ int main()
         printf("### DIY VIDEO DIGITIZER / SCANCONVERTER INIT OK ###\n\n");
         sniprintf(row1, LCD_ROW_LEN+1, "OSSC  fw. %u.%.2u" FW_SUFFIX1 FW_SUFFIX2, FW_VER_MAJOR, FW_VER_MINOR);
 #ifndef DEBUG
-        strncpy(row2, "2014-2024  marqs", LCD_ROW_LEN+1);
+        strncpy(row2, "2014-2025  marqs", LCD_ROW_LEN+1);
 #else
         strncpy(row2, "** DEBUG BUILD *", LCD_ROW_LEN+1);
 #endif
@@ -1162,16 +1168,16 @@ int main()
                 HDMITX_SetAVIInfoFrame(vmode_out.vic, (tc.tx_mode == TX_HDMI_RGB) ? F_MODE_RGB444 : F_MODE_YUV444, 0, 0, tc.hdmi_itc, vm_conf.hdmitx_pixr_ifr);
                 cm.cc.hdmi_itc = tc.hdmi_itc;
             }
-            if (tc.hdmi_hdr != cm.cc.hdmi_hdr) {
-                printf("setting HDR flag to %d\n", tc.hdmi_hdr);
-                HDMITX_SetHDRInfoFrame(tc.hdmi_hdr ? 3 : 0);
-                cm.cc.hdmi_hdr = tc.hdmi_hdr;
-            }
             if (tc.hdmi_vrr != cm.cc.hdmi_vrr) {
                 printf("setting VRR flag to %d\n", tc.hdmi_vrr);
                 HDMITX_SetVRRInfoFrame(tc.hdmi_vrr);
                 cm.cc.hdmi_vrr = tc.hdmi_vrr;
             }
+            if (tc.hdmi_hdr != cm.cc.hdmi_hdr) {
+                printf("setting HDR flag to %d\n", tc.hdmi_hdr);
+                HDMITX_SetHDRInfoFrame(tc.hdmi_hdr ? 3 : 0);
+                cm.cc.hdmi_hdr = tc.hdmi_hdr;
+            }
         }
         if (tc.av3_alt_rgb != cm.cc.av3_alt_rgb) {
             printf("Changing AV3 RGB source\n");

software/sys_controller/ossc/avconfig.c

@@ -45,6 +45,7 @@ const avconfig_t tc_default = {
     .vsync_thold = DEFAULT_VSYNC_THOLD,
     .pre_coast = DEFAULT_PRE_COAST,
     .post_coast = DEFAULT_POST_COAST,
+    .adc_pll_bw = 1,
     .sync_lpf = DEFAULT_SYNC_LPF,
     .alc_h_filter = DEFAULT_ALC_H_FILTER,
     .alc_v_filter = DEFAULT_ALC_V_FILTER,

software/sys_controller/ossc/avconfig.h

@@ -137,6 +137,7 @@ typedef struct {
     alt_u8 alc_h_filter;
     alt_u8 alc_v_filter;
     color_setup_t col;
+    alt_u8 full_vs_bypass;
 
     /* Audio settings */
     alt_u8 audio_dw_sampl;

software/sys_controller/ossc/firmware.h

@@ -24,10 +24,10 @@
 #include "sysconfig.h"
 
 #define FW_VER_MAJOR            1
-#define FW_VER_MINOR            11
+#define FW_VER_MINOR            12
 
 #define PROFILE_VER_MAJOR       1
-#define PROFILE_VER_MINOR       11
+#define PROFILE_VER_MINOR       12
 
 #define INITCFG_VER_MAJOR       1
 #define INITCFG_VER_MINOR       0

software/sys_controller/ossc/menu.c

@@ -80,7 +80,7 @@ static const char *auto_input_desc[] = { "Off", "Current input", "All inputs" };
 static const char *mask_color_desc[] = { "Black", "Blue", "Green", "Cyan", "Red", "Magenta", "Yellow", "White" };
 static const char *av3_alt_rgb_desc[] = { "Off", "AV1", "AV2" };
 static const char *shmask_mode_desc[] = { "Off", "A-Grille", "TV", "PVM" };
-static const char *lumacode_mode_desc[] = { "Off", "C64", "Spectrum", "Coleco/MSX", "NES" };
+static const char *lumacode_mode_desc[] = { "Off", "C64", "Spectrum", "Coleco/MSX", "NES", "Atari GTIA", "Atari VCS" };
 static const char *adc_pll_bw_desc[] = { "High", "Medium", "Low", "Ultra low" };
 static const char *fpga_pll_bw_desc[] = { "High", "Low" };
 
@@ -223,6 +223,7 @@ MENU(menu_compatibility, P99_PROTECT({ \
     { LNG("Full TX setup","ﾌﾙTXｾｯﾄｱｯﾌﾟ"),         OPT_AVCONFIG_SELECTION, { .sel = { &tc.full_tx_setup,    OPT_WRAP, SETTING_ITEM(off_on_desc) } } },
     { LNG("Allow TVP HPLL2x","TVP HPLL2xｷｮﾖｳ"), OPT_AVCONFIG_SELECTION, { .sel = { &tc.tvp_hpll2x,   OPT_WRAP, SETTING_ITEM(off_on_desc) } } },
     { "AV3 use alt. RGB",                        OPT_AVCONFIG_SELECTION, { .sel = { &tc.av3_alt_rgb,     OPT_WRAP, SETTING_ITEM(av3_alt_rgb_desc) } } },
+    { "Full VSYNC bypas",                       OPT_AVCONFIG_SELECTION, { .sel = { &tc.full_vs_bypass,   OPT_WRAP,   SETTING_ITEM(off_on_desc) } } },
     { "Default HDMI VIC",                       OPT_AVCONFIG_NUMVALUE,  { .num = { &tc.default_vic,     OPT_NOWRAP, 0, HDMI_1080p50, value_disp } } },
 }))
 

software/sys_controller/ossc/sysconfig.h

@@ -25,6 +25,7 @@
 #define SD_SPI_BASE I2C_OPENCORES_1_BASE
 
 #ifndef DEBUG
+#include <stdio.h>
 #define OS_PRINTF(...)
 #define ErrorF(...)
 #define printf(...)
@@ -38,6 +39,8 @@
 #define printf dd_printf
 #endif
 
+#define sniprintf snprintf
+
 #define WAITLOOP_SLEEP_US   10000
 
 #endif /* SYSCONFIG_H_ */

software/sys_controller/pcm1862/pcm1862.c

@@ -18,6 +18,7 @@
 //
 
 #include <stdio.h>
+#include <stdint.h>
 #include <unistd.h>
 #include "system.h"
 #include "i2c_opencores.h"

software/sys_controller/tvp7002/tvp7002.c

@@ -38,7 +38,8 @@ const ypbpr_to_rgb_csc_t csc_coeffs[] = {
 };
 
 static const alt_u8 Kvco[] = {75, 85, 150, 200};
-static const char *Kvco_str[] = { "Ultra low", "Low", "Medium", "High" };
+static const char* const Kvco_str[] = { "Ultra low", "Low", "Medium", "High" };
+static alt_u8 full_vs_bypass;
 
 static void tvp_set_clamp_type(video_format fmt)
 {
@@ -201,6 +202,7 @@ void tvp_init()
     };
 
     // Set default configuration (skip those which match register reset values)
+    full_vs_bypass = 0;
 
     // Configure external refclk, HPLL generated pclk
     tvp_sel_clk(REFCLK_EXT27, 0);
@@ -267,6 +269,10 @@ void tvp_set_gain_offset(color_setup_t *col) {
     tvp_writereg(TVP_B_FOFFSET_MSB, col->b_f_off);
 }
 
+void tvp_set_full_vs_bypass(alt_u8 enable) {
+    full_vs_bypass = enable;
+}
+
 // Configure H-PLL (sampling rate, VCO gain and charge pump current)
 void tvp_setup_hpll(alt_u16 h_samplerate, alt_u16 pixs_per_line, alt_u16 refclks_per_line, alt_u8 plldivby2)
 {
@@ -447,11 +453,10 @@ void tvp_source_sel(tvp_input_t input, tvp_sync_input_t syncinput, video_format
     else
         tvp_writereg(TVP_MISCCTRL3, 0x00);
 
-#ifdef SYNCBYPASS
+    if ((syncinput > TVP_SOG3) && (syncinput < TVP_CS_A))
-    tvp_writereg(TVP_SYNCBYPASS, 0x03);
+        tvp_writereg(TVP_SYNCBYPASS, full_vs_bypass ? 0x02 : 0x00);
-#else
+    else
-    tvp_writereg(TVP_SYNCBYPASS, 0x00);
+        tvp_writereg(TVP_SYNCBYPASS, 0x00);
-#endif
 
     //TODO:
     //TVP_ADCSETUP

software/sys_controller/tvp7002/tvp7002.h

@@ -98,6 +98,8 @@ void tvp_init();
 
 void tvp_set_gain_offset(color_setup_t *col);
 
+void tvp_set_full_vs_bypass(alt_u8 enable);
+
 void tvp_setup_hpll(alt_u16 h_samplerate, alt_u16 pixs_per_line, alt_u16 refclks_per_line, alt_u8 plldivby2);
 
 void tvp_sel_csc(const ypbpr_to_rgb_csc_t *csc);

software/sys_controller_bsp/HAL/inc/sys/alt_errno.h

@@ -73,9 +73,9 @@ extern int* (*alt_errno) (void);
 
 #include "alt_types.h"
 
-#undef errno
+/*#undef errno
 
-extern int errno;
+extern int errno;*/
 
 static ALT_INLINE int* alt_get_errno(void)
 {

software/sys_controller_bsp/Makefile

@@ -112,10 +112,10 @@ SOPC_FILE := ../../sys.sopcinfo
 #-------------------------------------------------------------------------------
 
 # Archiver command. Creates library files.
-AR = riscv32-unknown-elf-ar
+AR = riscv64-unknown-elf-ar
 
 # Assembler command. Note that CC is used for .S files.
-AS = riscv32-unknown-elf-gcc
+AS = riscv64-unknown-elf-gcc
 
 # Custom flags only passed to the archiver. This content of this variable is
 # directly passed to the archiver rather than the more standard "ARFLAGS". The
@@ -139,10 +139,10 @@ BSP_CFLAGS_OPTIMIZATION = -Os
 BSP_CFLAGS_WARNINGS = -Wall
 
 # C compiler command.
-CC = riscv32-unknown-elf-gcc -xc
+CC = riscv64-unknown-elf-gcc -xc
 
 # C++ compiler command.
-CXX = riscv32-unknown-elf-gcc -xc++
+CXX = riscv64-unknown-elf-gcc -xc++
 
 # Command used to remove files during 'clean' target.
 RM = rm -f
@@ -339,6 +339,7 @@ BSP_CFLAGS += \
 BSP_CPPFLAGS += \
   $(addprefix -I, $(BSP_INC_DIRS)) \
   $(addprefix -I, $(ALT_INCLUDE_DIRS)) \
+  $(addprefix -I, /usr/lib/picolibc/riscv64-unknown-elf/include) \
   $(ALT_CPPFLAGS) \
   $(CPPFLAGS)