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Load a BIOS font

This commit is contained in:
jaby 2023-12-13 19:46:34 -05:00
parent c448d3a720
commit 09650431e2
2 changed files with 32 additions and 4 deletions
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15
include/PSX/System/syscalls.hpp
View File

@ -148,18 +148,25 @@ namespace JabyEngine {
return __syscall_function_cast(Table_B, uint32_t(*)(uint32_t))(event);
}
static __always_inline int TestEvent(uint32_t event) {
static __always_inline int32_t TestEvent(uint32_t event) {
register uint32_t FuncID asm("t1") = 0x0B;
__asm__ volatile("" : "=r"(FuncID) : "r"(FuncID));
return __syscall_function_cast(Table_B, int (*)(uint32_t))(event);
return __syscall_function_cast(Table_B, int32_t (*)(uint32_t))(event);
}
static __always_inline int EnableEvent(uint32_t event) {
static __always_inline int32_t EnableEvent(uint32_t event) {
register uint32_t FuncID asm("t1") = 0x0C;
__asm__ volatile("" : "=r"(FuncID) : "r"(FuncID));
return __syscall_function_cast(Table_B, int (*)(uint32_t))(event);
return __syscall_function_cast(Table_B, int32_t (*)(uint32_t))(event);
}
static __always_inline const uint16_t* Krom2RawAdd(uint16_t sjis_code) {
register uint32_t FuncID asm("t1") = 0x51;
__asm__ volatile("" : "=r"(FuncID) : "r"(FuncID));
return __syscall_function_cast(Table_B, const uint16_t* (*)(uint16_t))(sjis_code);
}
void printf(const char* txt, ...);

21
src/Library/src/BootLoader/start_boot.cpp
View File

@ -3,6 +3,8 @@
#include <PSX/System/IOPorts/dma_io.hpp>
#include <stdio.h>
#include <PSX/System/syscalls.hpp>
extern "C" uint32_t __heap_start;
extern "C" uint32_t __bss_start;
extern "C" uint32_t __bss_end;
@ -42,6 +44,24 @@ namespace JabyEngine {
}
}
}
static void test_bios_font() {
static constexpr uint16_t SJIS = 0x83B5;
const auto* font = SysCall::Krom2RawAdd(SJIS);
const auto*const font_end = font + 16;
printf("Loading SJIS from @0x%p\n", font);
for(; font < font_end; font++) {
const auto cur_char = __builtin_bswap16(*font);
for(uint16_t shift = 1 << 15; shift; shift = shift >> 1) {
printf(cur_char & shift ? "#" : " ");
}
printf("\n");
}
}
void start() {
static constexpr auto DebugX = 0;
static constexpr auto DebugY = 0;
@ -50,6 +70,7 @@ namespace JabyEngine {
__debug_boot_print_at(GPU::Color24::White(), DebugX, DebugY, DebugScale, "Starting Planschbecken\n");
printf("Heap starts @0x%p\n", &__heap_start);
printf("BSS from 0x%p to 0x%p (%u)\n", &__bss_start, &__bss_end, __bss_len);
test_bios_font();
__debug_boot_print_at(GPU::Color24::Green(), DebugX, DebugY, DebugScale, "PLANSCHI from 0x%p to 0x%p\n", &__planschi_start, &__planschi_end);
boot::Start::setup();