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Load a BIOS font

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This commit is contained in:
Jaby
2023-12-13 19:46:34 -05:00
parent 73f8620a0a
commit 17d6ca5329
2 changed files with 32 additions and 4 deletions
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21
src/Library/src/BootLoader/start_boot.cpp
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@@ -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();