WIP

core1 gets to "DVHSTX started" but the gfx_dma_handler is never reached
so no video is generated. and I don't know why not.

.github/workflows/build.yaml

@@ -0,0 +1,62 @@
+name: Build pico-mac
+
+on:
+  push:
+  pull_request:
+  release:
+    types: [published]
+  check_suite:
+    types: [rerequested]
+
+
+jobs:
+  bins:
+    runs-on: ubuntu-latest
+    steps:
+
+    - uses: actions/checkout@v4
+      with:
+        persist-credentials: false
+
+    - name: Install ARM GCC
+      uses: carlosperate/arm-none-eabi-gcc-action@v1
+      with:
+        release: '13.2.Rel1'
+
+    - name: get submodules
+      run: git submodule update --init
+
+    - name: get pico-sdk
+      run: git clone --depth=1 -b adafruit-fruit-jam https://github.com/adafruit/pico-sdk ../pico-sdk && (cd ../pico-sdk && git submodule update --init)
+
+    - name: get pico-extras
+      run: git clone --depth=1 https://github.com/raspberrypi/pico-extras ../pico-extras
+
+    - name: build targets
+      run: |
+          ./fruitjam-build.sh
+          mkdir uf2s
+          cp build*/src/*.uf2 uf2s/
+          mkdir elfs
+          cp build*/src/*.elf elfs/
+
+    - name: Upload artifact
+      uses: actions/upload-artifact@v4
+      with:
+        name: uf2 files
+        path: uf2s/*
+
+    - name: Upload artifact
+      uses: actions/upload-artifact@v4
+      with:
+        name: elf files
+        path: elfs/*
+
+    - name: Create release
+      if: startsWith(github.ref, 'refs/tags/')
+      uses: softprops/action-gh-release@v1
+      with:
+        files: uf2s/*
+        fail_on_unmatched_files: true
+        body: "Select a doom_tiny uf2 from the list below, plus the doom1-whx uf2."
+

.gitignore

@@ -14,6 +14,7 @@ config.status
 configure
 lib
 obj
+picotool
 rpm.spec
 stamp-h
 stamp-h.in
@@ -30,6 +31,8 @@ HEXEN*.pcx
 STRIFE*.pcx
 /build*
 
+*.uf2
+
 # These are the default patterns globally ignored by Subversion:
 *.o
 *.lo

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "3rdparty/tinyusb"]
 	path = 3rdparty/tinyusb
 	url = https://github.com/liamfraser/tinyusb.git
+[submodule "3rdparty/dvhstx"]
+	path = 3rdparty/dvhstx
+	url = https://github.com/jepler/dvhstx

3rdparty/dvhstx

@@ -0,0 +1 @@
+Subproject commit 6ae02e64cfe022e79439c9fa848e89936f5ac2a8

README-fruitjam.md

@@ -0,0 +1,23 @@
+# Adafruit Fruit Jam (work in progress)
+
+ * `git submodule update --init`
+ * `sh fruitjam_build.sh`
+
+You will get binary files including `build_fruitjam/src/doom_tiny.uf2`. and `build_fruitjam/src/doom1-whx-for-fruitjam.uf2`.
+Copy those two uf2s to fruit jam.
+You may need to re-enter the bootloader after copying the first file.
+
+Note: When generating your own whx files, fruit jam ALWAYS uses the offset of 0x10080000.
+
+You should get:
+ * Debug UART output on pin "A4"
+ * video data on pin 8, sync on 6/7 (I expected data on 9/10 as well but there's not: It's supposed to be 1-bit RGB)
+ * Audio (soundtrack + FX) on I2S
+
+TODO:
+ * HSTX video
+ * Pico-PIO-USB
+
+Would be nice:
+ * combined UF2 files
+ * PICO\_NET

fruitjam-build.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+TAG=fruitjam
+BUILD=build_${TAG}
+export CFLAGS="-include $(pwd)/fruitjam_cflags.h"
+export CXXFLAGS="-include $(pwd)/fruitjam_cflags.h"
+cmake -S . -B $BUILD \
+    -DCMAKE_BUILD_TYPE=MinSizeRel \
+    -DPICO_SDK_PATH=../pico-sdk \
+    -DPICOTOOL_FETCH_FROM_GIT_PATH="$(pwd)/picotool" \
+    -DBOARD=adafruit_fruit_jam -DPICO_BOARD=adafruit_fruit_jam \
+    -DUSE_HSTX=1 \
+    ${CMAKE_ARGS} "$@"
+
+make -C $BUILD -j$(nproc)
+./picotool/picotool-build/picotool uf2 convert doom1.whx -t bin $BUILD/src/doom1-whx-for-fruitjam.uf2 -o 0x10080000 --family data

fruitjam_cflags.h

@@ -0,0 +1,32 @@
+#ifndef FRUITJAM_CFLAGS_H
+#define FRUITJAM_CFLAGS_H 1
+#define PICO_SCANVIDEO_COLOR_PIN_BASE 8
+#define PICO_SCANVIDEO_PIXEL_RCOUNT 1
+#define PICO_SCANVIDEO_PIXEL_GCOUNT 1
+#define PICO_SCANVIDEO_PIXEL_BCOUNT 1
+#define PICO_SCANVIDEO_PIXEL_RSHIFT 0
+#define PICO_SCANVIDEO_PIXEL_GSHIFT 1
+#define PICO_SCANVIDEO_PIXEL_BSHIFT 2
+#define PICO_SCANVIDEO_SYNC_PIN_BASE 6
+#define SD_TX 35
+#define SD_RX 36
+#define SD_SCK 34
+#define SD_CS 39
+#define USE_SD 1
+#define USE_HSTX 1
+#define PICO_DEFAULT_UART 0
+#define PICO_DEFAULT_UART_TX_PIN 44
+#define PICO_DEFAULT_UART_RX_PIN 45
+#define PICO_AUDIO_I2S_DATA_PIN 24
+#define PICO_AUDIO_I2S_CLOCK_PIN_BASE 26
+#define HSTX_CKP 11
+#define HSTX_D0P 13
+#define HSTX_D1P 15
+#define HSTX_D2P 17
+
+// Move the WAD base address way up since we have plenty of flash
+// Original builds were as low as 0x10040000, this gives an extra 256kB for code since we're chunky
+#undef TINY_WAD_ADDR
+#define TINY_WAD_ADDR 0x10080000
+
+#endif

src/CMakeLists.txt

@@ -502,7 +502,7 @@ function(add_doom_tiny SUFFIX RENDER_LIB)
         # SDK minimilization
         PICO_TIME_DEFAULT_ALARM_POOL_DISABLED=1
         PICO_TIME_DEFAULT_ALARM_POOL_MAX_TIMERS=1
-        PICO_DISABLE_SHARED_IRQ_HANDLERS=1
+        # Incompatible with newest sdk: PICO_DISABLE_SHARED_IRQ_HANDLERS=1 https://github.com/raspberrypi/pico-sdk/issues/2626
         PICO_USE_OPTIMISTIC_SBRK=1
 
         # MUSIC

src/i_main.c

@@ -51,6 +51,241 @@
 
 void D_DoomMain (void);
 
+#if defined(ADAFRUIT_FRUIT_JAM)
+#include "hardware/i2c.h"
+#define DAC_I2C_ADDR 0x18
+#define DEBUG_I2C (0)
+
+static void writeRegister(uint8_t reg, uint8_t value) {
+  uint8_t buf[2];
+  buf[0] = reg;
+  buf[1] = value;
+  int res = i2c_write_timeout_us(i2c0, DAC_I2C_ADDR, buf, sizeof(buf), /* nostop */ false, 1000);
+  if (res != 2) {
+    panic("i2c_write_timeout failed: res=%d\n", res);
+  }
+if(DEBUG_I2C)
+  printf("Write Reg: %d = 0x%x\n", reg, value);
+}
+
+static uint8_t readRegister(uint8_t reg) {
+  uint8_t buf[1];
+  buf[0] = reg;
+  int res = i2c_write_timeout_us(i2c0, DAC_I2C_ADDR, buf, sizeof(buf), /* nostop */ true, 1000);
+  if (res != 1) {
+if(DEBUG_I2C)
+printf("res=%d\n", res);
+    panic("i2c_write_timeout failed: res=%d\n", res);
+  }
+  res = i2c_read_timeout_us(i2c0, DAC_I2C_ADDR, buf, sizeof(buf), /* nostop */ false, 1000);
+  if (res != 1) {
+      if(DEBUG_I2C)
+        printf("res=%d\n", res);
+      panic("i2c_read_timeout failed: res=%d\n", res);
+  }
+  uint8_t value = buf[0];
+  if(DEBUG_I2C)
+    printf("Read Reg: %d = 0x%x\n", reg, value);
+  return value;
+}
+
+static void modifyRegister(uint8_t reg, uint8_t mask, uint8_t value) {
+  uint8_t current = readRegister(reg);
+  if(DEBUG_I2C)
+    printf("Modify Reg: %d = [Before: 0x%x] with mask 0x%x and value 0x%x\n", reg, current, mask, value);
+  uint8_t new_value = (current & ~mask) | (value & mask);
+  writeRegister(reg, new_value);
+}
+
+static void setPage(uint8_t page) {
+  printf("Set page %d\n", page);
+  writeRegister(0x00, page);
+}
+
+
+static void Wire_begin() {
+    i2c_init(i2c0, 100000);
+    gpio_set_function(20, GPIO_FUNC_I2C);
+    gpio_set_function(21, GPIO_FUNC_I2C);
+}
+
+static void fruitjam_init_i2s(void) {
+  gpio_init(22);
+  gpio_set_dir(22, true);
+  gpio_put(22, true); // allow i2s to come out of reset
+
+  Wire_begin();
+  sleep_ms(1000);
+  
+  if(DEBUG_I2C)
+    printf("initialize codec\n");
+
+  // Reset codec
+  writeRegister(0x01, 0x01);
+  sleep_ms(10);
+
+  // Interface Control
+  modifyRegister(0x1B, 0xC0, 0x00);
+  modifyRegister(0x1B, 0x30, 0x00);
+
+  // Clock MUX and PLL settings
+  modifyRegister(0x04, 0x03, 0x03);
+  modifyRegister(0x04, 0x0C, 0x04);
+  
+  writeRegister(0x06, 0x20); // PLL J
+  writeRegister(0x08, 0x00); // PLL D LSB
+  writeRegister(0x07, 0x00); // PLL D MSB
+  
+  modifyRegister(0x05, 0x0F, 0x02); // PLL P/R
+  modifyRegister(0x05, 0x70, 0x10);
+
+  // DAC/ADC Config
+  modifyRegister(0x0B, 0x7F, 0x08); // NDAC
+  modifyRegister(0x0B, 0x80, 0x80);
+  
+  modifyRegister(0x0C, 0x7F, 0x02); // MDAC
+  modifyRegister(0x0C, 0x80, 0x80);
+  
+  modifyRegister(0x12, 0x7F, 0x08); // NADC
+  modifyRegister(0x12, 0x80, 0x80);
+  
+  modifyRegister(0x13, 0x7F, 0x02); // MADC
+  modifyRegister(0x13, 0x80, 0x80);
+
+  // PLL Power Up
+  modifyRegister(0x05, 0x80, 0x80);
+
+  // Headset and GPIO Config
+setPage(1);
+modifyRegister(0x2e, 0xFF, 0x0b); 
+setPage(0);
+  modifyRegister(0x43, 0x80, 0x80); // Headset Detect
+  modifyRegister(0x30, 0x80, 0x80); // INT1 Control
+  modifyRegister(0x33, 0x3C, 0x14); // GPIO1
+
+
+  // DAC Setup
+  modifyRegister(0x3F, 0xC0, 0xC0);
+
+  // DAC Routing
+  setPage(1);
+  modifyRegister(0x23, 0xC0, 0x40);
+  modifyRegister(0x23, 0x0C, 0x04);
+
+  // DAC Volume Control
+  setPage(0);
+  modifyRegister(0x40, 0x0C, 0x00);
+  writeRegister(0x41, 0x28); // Left DAC Vol
+  writeRegister(0x42, 0x28); // Right DAC Vol
+
+  // ADC Setup
+  modifyRegister(0x51, 0x80, 0x80);
+  modifyRegister(0x52, 0x80, 0x00);
+  writeRegister(0x53, 0x68); // ADC Volume
+
+  // Headphone and Speaker Setup
+  setPage(1);
+  modifyRegister(0x1F, 0xC0, 0xC0); // HP Driver
+  modifyRegister(0x28, 0x04, 0x04); // HP Left Gain
+  modifyRegister(0x29, 0x04, 0x04); // HP Right Gain
+  writeRegister(0x24, 0x0A);  // Left Analog HP
+  writeRegister(0x25, 0x0A);  // Right Analog HP
+  
+  modifyRegister(0x28, 0x78, 0x40); // HP Left Gain
+  modifyRegister(0x29, 0x78, 0x40); // HP Right Gain
+
+  // Speaker Amp
+  modifyRegister(0x20, 0x80, 0x80);
+  modifyRegister(0x2A, 0x04, 0x04);
+  modifyRegister(0x2A, 0x18, 0x08);
+  writeRegister(0x26, 0x0A);
+
+  // Return to page 0
+  setPage(0);
+
+  if(DEBUG_I2C)
+    printf("Initialization complete!\n");
+
+
+  // Read all registers for verification
+  if(DEBUG_I2C) {
+    printf("Reading all registers for verification:\n");
+    
+    setPage(0);
+    readRegister(0x00);  // AIC31XX_PAGECTL
+    readRegister(0x01);  // AIC31XX_RESET
+    readRegister(0x03);  // AIC31XX_OT_FLAG
+    readRegister(0x04);  // AIC31XX_CLKMUX
+    readRegister(0x05);  // AIC31XX_PLLPR
+    readRegister(0x06);  // AIC31XX_PLLJ
+    readRegister(0x07);  // AIC31XX_PLLDMSB
+    readRegister(0x08);  // AIC31XX_PLLDLSB
+    readRegister(0x0B);  // AIC31XX_NDAC
+    readRegister(0x0C);  // AIC31XX_MDAC
+    readRegister(0x0D);  // AIC31XX_DOSRMSB
+    readRegister(0x0E);  // AIC31XX_DOSRLSB
+    readRegister(0x10);  // AIC31XX_MINI_DSP_INPOL
+    readRegister(0x12);  // AIC31XX_NADC
+    readRegister(0x13);  // AIC31XX_MADC
+    readRegister(0x14);  // AIC31XX_AOSR
+    readRegister(0x19);  // AIC31XX_CLKOUTMUX
+    readRegister(0x1A);  // AIC31XX_CLKOUTMVAL
+    readRegister(0x1B);  // AIC31XX_IFACE1
+    readRegister(0x1C);  // AIC31XX_DATA_OFFSET
+    readRegister(0x1D);  // AIC31XX_IFACE2
+    readRegister(0x1E);  // AIC31XX_BCLKN
+    readRegister(0x1F);  // AIC31XX_IFACESEC1
+    readRegister(0x20);  // AIC31XX_IFACESEC2
+    readRegister(0x21);  // AIC31XX_IFACESEC3
+    readRegister(0x22);  // AIC31XX_I2C
+    readRegister(0x24);  // AIC31XX_ADCFLAG
+    readRegister(0x25);  // AIC31XX_DACFLAG1
+    readRegister(0x26);  // AIC31XX_DACFLAG2
+    readRegister(0x27);  // AIC31XX_OFFLAG
+    readRegister(0x2C);  // AIC31XX_INTRDACFLAG
+    readRegister(0x2D);  // AIC31XX_INTRADCFLAG
+    readRegister(0x2E);  // AIC31XX_INTRDACFLAG2
+    readRegister(0x2F);  // AIC31XX_INTRADCFLAG2
+    readRegister(0x30);  // AIC31XX_INT1CTRL
+    readRegister(0x31);  // AIC31XX_INT2CTRL
+    readRegister(0x33);  // AIC31XX_GPIO1
+    readRegister(0x3C);  // AIC31XX_DACPRB
+    readRegister(0x3D);  // AIC31XX_ADCPRB
+    readRegister(0x3F);  // AIC31XX_DACSETUP
+    readRegister(0x40);  // AIC31XX_DACMUTE
+    readRegister(0x41);  // AIC31XX_LDACVOL
+    readRegister(0x42);  // AIC31XX_RDACVOL
+    readRegister(0x43);  // AIC31XX_HSDETECT
+    readRegister(0x51);  // AIC31XX_ADCSETUP
+    readRegister(0x52);  // AIC31XX_ADCFGA
+    readRegister(0x53);  // AIC31XX_ADCVOL
+
+    setPage(1);
+    readRegister(0x1F);  // AIC31XX_HPDRIVER
+    readRegister(0x20);  // AIC31XX_SPKAMP
+    readRegister(0x21);  // AIC31XX_HPPOP
+    readRegister(0x22);  // AIC31XX_SPPGARAMP
+    readRegister(0x23);  // AIC31XX_DACMIXERROUTE
+    readRegister(0x24);  // AIC31XX_LANALOGHPL
+    readRegister(0x25);  // AIC31XX_RANALOGHPR
+    readRegister(0x26);  // AIC31XX_LANALOGSPL
+    readRegister(0x27);  // AIC31XX_RANALOGSPR
+    readRegister(0x28);  // AIC31XX_HPLGAIN
+    readRegister(0x29);  // AIC31XX_HPRGAIN
+    readRegister(0x2A);  // AIC31XX_SPLGAIN
+    readRegister(0x2B);  // AIC31XX_SPRGAIN
+    readRegister(0x2C);  // AIC31XX_HPCONTROL
+    readRegister(0x2E);  // AIC31XX_MICBIAS
+    readRegister(0x2F);  // AIC31XX_MICPGA
+    readRegister(0x30);  // AIC31XX_MICPGAPI
+    readRegister(0x31);  // AIC31XX_MICPGAMI
+    readRegister(0x32);  // AIC31XX_MICPGACM
+
+    setPage(3);
+    readRegister(0x10);  // AIC31XX_TIMERDIVIDER
+   }
+}
+#endif
 #if PICO_ON_DEVICE
 #include "pico/binary_info.h"
 bi_decl(bi_3pins_with_names(PICO_AUDIO_I2S_DATA_PIN, "I2S DIN", PICO_AUDIO_I2S_CLOCK_PIN_BASE, "I2S BCK", PICO_AUDIO_I2S_CLOCK_PIN_BASE+1, "I2S LRCK"));
@@ -73,11 +308,17 @@ int main(int argc, char **argv)
             ((rxdelay << QMI_M0_TIMING_RXDELAY_LSB) & QMI_M0_TIMING_RXDELAY_BITS),
             QMI_M0_TIMING_CLKDIV_BITS | QMI_M0_TIMING_RXDELAY_BITS
     );
+#if defined(ADAFRUIT_FRUIT_JAM)
+    fruitjam_init_i2s();
 #endif
+#endif
+#if !USE_HSTX
+    // hstx is in charge of all clocking
     vreg_set_voltage(VREG_VOLTAGE_1_30);
     busy_wait_us(1000);
     // todo pause? is this the cause of the cold start issue?
     set_sys_clock_khz(270000, true);
+#endif
 #if !USE_PICO_NET
     // debug ?
 //    gpio_debug_pins_init();

src/pico/CMakeLists.txt

@@ -38,8 +38,19 @@ target_compile_definitions(common_pico INTERFACE
         PICO_USE_STACK_GUARDS=0 # todo we can actually use these sensibly, but right now we do overflow!
 )
 
-pico_generate_pio_header(common_pico ${CMAKE_CURRENT_LIST_DIR}/video_doom.pio)
-target_link_libraries(common_pico INTERFACE pico_stdlib pico_multicore pico_scanvideo_dpi)
+target_link_libraries(common_pico INTERFACE pico_stdlib pico_multicore)
+
+if (USE_HSTX)
+    target_sources(common_pico INTERFACE
+            ${CMAKE_CURRENT_LIST_DIR}/dvhstx_shim.cpp)
+    include(${CMAKE_CURRENT_LIST_DIR}/../../3rdparty/dvhstx/drivers/dvhstx/dvhstx.cmake)
+    target_link_libraries(common_pico INTERFACE dvhstx)
+    target_compile_definitions(common_pico INTERFACE USE_HSTX=1)
+else()
+    pico_generate_pio_header(common_pico ${CMAKE_CURRENT_LIST_DIR}/video_doom.pio)
+    target_link_libraries(common_pico INTERFACE pico_scanvideo_dpi)
+    target_compile_definitions(common_pico INTERFACE USE_HSTX=0)
+endif()
 
 add_library(pico_cd INTERFACE)
 if (TARGET tinyusb_host)

src/pico/dvhstx_shim.cpp

@@ -0,0 +1,8 @@
+#include "dvhstx.hpp"
+#include "dvhstx_shim.h"
+
+static pimoroni::DVHSTX display; 
+void hstx_setup(line_fun_t gen_line) {
+    display.set_callback(gen_line, &display);
+    display.init(640, 240, pimoroni::DVHSTX::MODE_LINE_CALLBACK_RGB565, {HSTX_CKP, HSTX_D0P, HSTX_D1P, HSTX_D2P}); 
+}

src/pico/dvhstx_shim.h

@@ -0,0 +1,12 @@
+#pragma once
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+typedef void(*line_fun_t)(void *cb_data, int line_num, uint32_t *data); 
+void hstx_setup(line_fun_t gen_line);
+
+#if defined(__cplusplus)
+}
+#endif

src/pico/i_input.c

@@ -465,11 +465,7 @@ void I_BindInputVariables(void)
     M_BindIntVariable("novert",                    &novert);
 }
 
-#if PICO_NO_HARDWARE
-#include "pico/scanvideo.h"
-#else
 #define WITH_SHIFT 0x8000
-#endif
 
 static void pico_key_down(int scancode, int keysym, int modifiers) {
     event_t event;

src/pico/i_video.c

@@ -43,22 +43,36 @@
 #include "w_wad.h"
 #include "z_zone.h"
 
+#if USE_HSTX
+#if !PICO_ON_DEVICE
+#error Do not set USE_HSTX when !ON_DEVICE (only scanvideo is implemented)
+#endif
+#else
 #include "pico/scanvideo.h"
 #include "pico/scanvideo/composable_scanline.h"
+#endif
 #include "pico/multicore.h"
 #include "pico/sync.h"
 #include "pico/time.h"
 #include "hardware/gpio.h"
 #include "picodoom.h"
-#include "video_doom.pio.h"
 #include "image_decoder.h"
 #if PICO_ON_DEVICE
 #include "hardware/dma.h"
 #include "hardware/structs/xip_ctrl.h"
 #endif
 
-#define YELLOW_SUBMARINE 0
+#if USE_HSTX
+#include "dvhstx_shim.h"
+#undef SUPPORT_TEXT
+#define SUPPORT_TEXT 0
+#define PICO_SCANVIDEO_PIXEL_FROM_RGB8(r,g,b) (((r) << 16) | ((g) << 8) | (b))
+#else
+#include "video_doom.pio.h"
 #define SUPPORT_TEXT 1
+#endif
+
+#define YELLOW_SUBMARINE 0
 #if SUPPORT_TEXT
 typedef struct __packed {
     const char * const name;
@@ -91,7 +105,7 @@ static uint16_t ega_colors[] = {
 
 // todo temproarly turned this off because it causes a seeming bug in scanvideo (perhaps only with the new callback stuff) where the last repeated scanline of a pixel line is freed while shown
 //  note it may just be that this happens anyway, but usually we are writing slower than the beam?
-#define USE_INTERP PICO_ON_DEVICE
+#define USE_INTERP PICO_ON_DEVICE && !USE_HSTX
 #if USE_INTERP
 #include "hardware/interp.h"
 #endif
@@ -141,6 +155,7 @@ static uint32_t *text_scanline_buffer_start;
 static uint8_t *text_screen_cpy;
 static uint8_t *text_font_cpy;
 
+#if !USE_HSTX
 #if USE_1280x1024x60
 //static uint32_t missing_scanline_data[] = {
 //        video_doom_offset_raw_1p | (0 << 16u),
@@ -267,6 +282,7 @@ static inline void interp_restore_static(interp_hw_t *interp, interp_hw_save_t *
     interp->ctrl[1] = saver->ctrl[1];
 }
 #endif
+#endif
 
 void I_ShutdownGraphics(void)
 {
@@ -980,6 +996,56 @@ void __no_inline_not_in_flash_func(new_frame_stuff)() {
     }
 }
 
+
+#if USE_HSTX
+void __scratch_x("scanlines") gen_line(void *cb_data, int scanline, uint32_t *dest) {
+    if(scanline == 0) {
+        new_frame_stuff();
+    }
+
+    DEBUG_PINS_SET(scanline_copy, 1);
+    if (display_video_type != VIDEO_TYPE_TEXT) {
+        scanline_funcs[display_video_type](dest, scanline);
+        if (display_video_type >= FIRST_VIDEO_TYPE_WITH_OVERLAYS) {
+            assert(scanline < count_of(vpatchlists->vpatch_starters));
+            int prev = 0;
+            for (int vp = vpatchlists->vpatch_starters[scanline]; vp;) {
+                int next = vpatchlists->vpatch_next[vp];
+                while (vpatchlists->vpatch_next[prev] && vpatchlists->vpatch_next[prev] < vp) {
+                    prev = vpatchlists->vpatch_next[prev];
+                }
+                assert(prev != vp);
+                assert(vpatchlists->vpatch_next[prev] != vp);
+                vpatchlists->vpatch_next[vp] = vpatchlists->vpatch_next[prev];
+                vpatchlists->vpatch_next[prev] = vp;
+                prev = vp;
+                vp = next;
+            }
+            vpatchlist_t *overlays = vpatchlists->overlays[display_overlay_index];
+            prev = 0;
+            for (int vp = vpatchlists->vpatch_next[prev]; vp; vp = vpatchlists->vpatch_next[prev]) {
+                patch_t *patch = resolve_vpatch_handle(overlays[vp].entry.patch_handle);
+                int yoff = scanline - overlays[vp].entry.y;
+                if (yoff < vpatch_height(patch)) {
+                    vpatchlists->vpatch_doff[vp] = draw_vpatch((uint16_t*)(dest), patch, &overlays[vp],
+                                                               vpatchlists->vpatch_doff[vp]);
+                    prev = vp;
+                } else {
+                    vpatchlists->vpatch_next[prev] = vpatchlists->vpatch_next[vp];
+                }
+            }
+        }
+    } else {
+#if 0 // SUPPORT_TEXT doesn't work with dvhstx
+        render_text_mode_scanline(buffer, scanline);
+#else
+        memset(dest, 0, SCREENWIDTH * 2);
+#endif
+    }
+    DEBUG_PINS_CLR(scanline_copy, 1);
+}
+
+#else
 void __scratch_x("scanlines") fill_scanlines() {
 #if SUPPORT_TEXT
     struct scanvideo_scanline_buffer *buffer = scanvideo_begin_scanline_generation_linked(display_video_type == VIDEO_TYPE_TEXT ? 2 : 1, false);
@@ -1069,6 +1135,7 @@ void __scratch_x("scanlines") fill_scanlines() {
     }
 #endif
 }
+#endif
 #pragma GCC pop_options
 
 #if PICO_ON_DEVICE
@@ -1088,6 +1155,9 @@ static void __not_in_flash_func(free_buffer_callback)() {
 
 //static semaphore_t init_sem;
 static void core1() {
+#if USE_HSTX
+    hstx_setup(gen_line);
+#else
 #if !PICO_ON_DEVICE
     void simulate_video_pio_video_doom(const uint32_t *dma_data, uint32_t dma_data_size,
                                        uint16_t *pixel_buffer, int32_t max_pixels, int32_t expected_width, bool overlay);
@@ -1113,6 +1183,7 @@ static void core1() {
         fill_scanlines();
 #endif
     }
+#endif
 }
 
 #if PICO_RP2350
@@ -1386,6 +1457,7 @@ void I_DisplayFPSDots(boolean dots_on)
 {
 }
 
+#if !USE_HSTX
 #if PICO_ON_DEVICE
 bool video_doom_adapt_for_mode(const struct scanvideo_pio_program *program, const struct scanvideo_mode *mode,
                                struct scanvideo_scanline_buffer *missing_scanvideo_scanline_buffer, uint16_t *modifiable_instructions) {
@@ -1516,5 +1588,6 @@ void simulate_video_pio_video_doom(const uint32_t *dma_data, uint32_t dma_data_s
     assert(last_was_black);
 }
 #endif
+#endif
 
 #endif

src/w_file_memory.c

@@ -90,7 +90,7 @@ static wad_file_t *W_Memory_OpenFile(const char *path)
     }
 #endif
 #endif
-    return &fileo;
+    return (wad_file_t *)&fileo;
 }
 
 static void W_Memory_CloseFile(wad_file_t *wad)