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VERA driver rewrite

This commit is contained in:
Kyle J Cardoza 2024-07-15 19:26:07 -04:00
parent 233a869420
commit 59e15a5c42
7 changed files with 1003 additions and 105 deletions
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8
.vscode/settings.json vendored
View File

@ -1,4 +1,10 @@
{ {
"C_Cpp.errorSquiggles": "disabled", "C_Cpp.errorSquiggles": "disabled",
"C_Cpp.dimInactiveRegions": false "C_Cpp.dimInactiveRegions": false,
"files.associations": {
"*.h": "c",
"*.s": "assembly",
"type_traits": "c",
"compare": "c"
}
} }

4
config/config.mk
View File

@ -37,7 +37,9 @@ CFLAGS += --debug \
-Wno-gnu-conditional-omitted-operand \ -Wno-gnu-conditional-omitted-operand \
-Wno-gnu-case-range \ -Wno-gnu-case-range \
-Wimplicit-fallthrough \ -Wimplicit-fallthrough \
-Wno-gnu-folding-constant -Wno-gnu-folding-constant \
-Wno-unused-parameter \
-Wno-unused-variable
ASFLAGS += --debug ASFLAGS += --debug
endif endif

8
config/kernel.scm
View File

@ -1,7 +1,7 @@
(define memories '( (define memories '(
(memory RAM (memory RAM
(address (#x000200 . #x001FFF)) (address (#x001000 . #x002FFF))
(type RAM) (type RAM)
(section zhuge) (section zhuge)
(section znear) (section znear)
@ -31,8 +31,8 @@
) )
(memory Stack (memory Stack
(address (#x000100 . #x0001FF)) (address (#x000200 . #x000FFF))
(section (stack #x00100)) (section (stack #x00200))
) )
(memory DirectPage (memory DirectPage
@ -43,7 +43,7 @@
) )
) )
(block stack (size #x100)) ; machine stack size (block stack (size #xE00)) ; machine stack size
(base-address _DirectPageStart DirectPage 0) (base-address _DirectPageStart DirectPage 0)

954
include/kernel/hardware/vera.h
View File

@ -132,14 +132,958 @@
// The assembler can't handle this stuff. // The assembler can't handle this stuff.
#ifdef __CALYPSI_CC__ #ifdef __CALYPSI_CC__
static inline uint8_t vera_addr_l_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF00 \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_addr_l_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF00 \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_addr_m_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF01 \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_addr_m_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF01 \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_addr_h_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF02 \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_addr_h_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF02 \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_data_0_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF03 \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_data_0_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF03 \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_data_1_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF04 \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_data_1_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF04 \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_ctrl_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF05 \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_ctrl_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF05 \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_ien_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF06 \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_ien_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF06 \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_isr_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF07 \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_isr_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF07 \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_scanline_l_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF08 \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_irq_line_l_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF08 \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_dc_video_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda #0b00000010 \n"
" trb 0x00DF05 \n"
" lda 0x00DF09 \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_dc_video_write(uint8_t value) {
__asm(" sep #0x20 \n"
" pha \n"
" lda #0b00000010 \n"
" trb 0x00DF05 \n"
" pla \n"
" sta 0x00DF09 \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_dc_hscale_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda #0b00000010 \n"
" trb 0x00DF05 \n"
" lda 0x00DF0A \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_dc_hscale_write(uint8_t value) {
__asm(" sep #0x20 \n"
" pha \n"
" lda #0b00000010 \n"
" trb 0x00DF05 \n"
" pla \n"
" sta 0x00DF0A \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_dc_vscale_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda #0b00000010 \n"
" trb 0x00DF05 \n"
" lda 0x00DF0B \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_dc_vscale_write(uint8_t value) {
__asm(" sep #0x20 \n"
" pha \n"
" lda #0b00000010 \n"
" trb 0x00DF05 \n"
" pla \n"
" sta 0x00DF0B \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_dc_border_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda #0b00000010 \n"
" trb 0x00DF05 \n"
" lda 0x00DF0C \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_dc_border_write(uint8_t value) {
__asm(" sep #0x20 \n"
" pha \n"
" lda #0b00000010 \n"
" trb 0x00DF05 \n"
" pla \n"
" sta 0x00DF0C \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_dc_hstart_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda #0b00000010 \n"
" tsb 0x00DF05 \n"
" lda 0x00DF09 \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_dc_hstart_write(uint8_t value) {
__asm(" sep #0x20 \n"
" pha \n"
" lda #0b00000010 \n"
" tsb 0x00DF05 \n"
" pla \n"
" sta 0x00DF09 \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_dc_hstop_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda #0b00000010 \n"
" tsb 0x00DF05 \n"
" lda 0x00DF0A \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_dc_hstop_write(uint8_t value) {
__asm(" sep #0x20 \n"
" pha \n"
" lda #0b00000010 \n"
" tsb 0x00DF05 \n"
" pla \n"
" sta 0x00DF0A \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_dc_vstart_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda #0b00000010 \n"
" tsb 0x00DF05 \n"
" lda 0x00DF0B \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_dc_vstart_write(uint8_t value) {
__asm(" sep #0x20 \n"
" pha \n"
" lda #0b00000010 \n"
" tsb 0x00DF05 \n"
" pla \n"
" sta 0x00DF0B \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_dc_vstop_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda #0b00000010 \n"
" tsb 0x00DF05 \n"
" lda 0x00DF0C \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_dc_vstop_write(uint8_t value) {
__asm(" sep #0x20 \n"
" pha \n"
" lda #0b00000010 \n"
" tsb 0x00DF05 \n"
" pla \n"
" sta 0x00DF0C \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_l0_config_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF0D \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_l0_config_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF0D \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_l0_mapbase_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF0E \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_l0_mapbase_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF0E \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_l0_tilebase_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF0F \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_l0_tilebase_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF0F \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_l0_hscroll_l_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF10 \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_l0_hscroll_l_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF10 \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_l0_hscroll_h_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF11 \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_l0_hscroll_h_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF11 \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_l0_vscroll_l_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF12 \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_l0_vscroll_l_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF12 \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_l0_vscroll_h_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF13 \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_l0_vscroll_h_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF13 \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_l1_config_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF14 \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_l1_config_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF14 \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_l1_mapbase_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF15 \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_l1_mapbase_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF15 \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_l1_tilebase_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF16 \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_l1_tilebase_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF16 \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_l1_hscroll_l_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF17 \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_l1_hscroll_l_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF17 \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_l1_hscroll_h_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF18 \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_l1_hscroll_h_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF18 \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_l1_vscroll_l_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF19 \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_l1_vscroll_l_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF19 \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_l1_vscroll_h_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF1A \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_l1_vscroll_h_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF1A \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_audio_ctrl_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF1B \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_audio_ctrl_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF1B \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_audio_rate_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF1C \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_audio_rate_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF1C \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_audio_data_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF1D \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_audio_data_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF1D \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_spi_data_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF1E \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_l1_spi_data_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF1E \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
static inline uint8_t vera_spi_ctrl_read(void) {
uint8_t result;
__asm(" sep #0x20 \n"
" lda 0x00DF1F \n"
" rep #0x20 \n"
" and 0x00FF \n"
: "=Ka"(result)
:
: "c"
);
return result;
}
static inline void vera_l1_spi_ctrl_write(uint8_t value) {
__asm(" sep #0x20 \n"
" sta 0x00DF1F \n"
" rep #0x20 \n"
" and 0x00FF \n"
:
: "Ka"(value)
: "c"
);
}
void vera_init(void); void vera_init(void);
void vera_reset(void); void vera_reset(void);
uint8_t vera_reg_read(uint32_t regnum);
void vera_reg_write(uint32_t regnum, uint8_t value);
void vera_address_select(uint8_t value); void vera_address_select(uint8_t value);
void vera_address_set(uint32_t address); void vera_address_set(uint32_t address);
@ -148,6 +1092,6 @@ void vera_mem_write(uint32_t dest, void *src, size_t length);
void vera_mem_set(uint32_t dest, uint8_t value, size_t length); void vera_mem_set(uint32_t dest, uint8_t value, size_t length);
void vera_mem_clear(uint32_t dest, size_t length); void vera_mem_clear(uint32_t dest, size_t length);
#endif #endif

29
src/kernel/cstartup.s
View File

@ -25,14 +25,19 @@
#include "kernel/hardware/w65c265s.h" #include "kernel/hardware/w65c265s.h"
.section boot, noreorder .section boot, noreorder
.pubweak __program_root_section .public __program_root_section
__program_root_section: __program_root_section:
.asciz "WDC" .asciz "WDC"
w65c265s_init: w65c265s_init:
; Begin tracing for the emulator. NOP for the real hardware. ; Begin tracing for the emulator. NOP for the real hardware.
wdm #0x80 wdm #0x80
; native 16-bit mode
clc
xce
; Disable interrupts ; Disable interrupts
sei sei
stz UIER stz UIER
@ -41,17 +46,16 @@ w65c265s_init:
short_a short_a
long_i long_i
; We reset the VERA at boot. So P4.2 is an output, held ; We reset the VERA at boot. So P4.2 is an output held high.
; low until later in the boot sequence.
lda #1 << 2 lda #1 << 2
trb PD4 trb PD4
tsb PDD4 tsb PDD4
; Now we delay a while. ; Now we delay a while.
ldy ##0x0FFF ldy ##0x0FFF
delay_y delay_y1
dey dey
bne delay_y bne delay_y1
fclk_start fclk_start
@ -64,16 +68,19 @@ delay_y
; Disable the on-CPU ROM ; Disable the on-CPU ROM
w65c265s_rom_off w65c265s_rom_off
; Disable the on-CPU RAM jmp long:c_runtime_startup
w65c265s_sram_off
clc .section code
xce ; native 16-bit mode .public c_runtime_startup
c_runtime_startup:
rep #0x38 ; 16-bit registers, no decimal mode rep #0x38 ; 16-bit registers, no decimal mode
ldx ##.sectionEnd stack ldx ##.sectionEnd stack
txs ; set stack txs ; set stack
lda ##_DirectPageStart lda ##_DirectPageStart
tcd ; set direct page tcd ; set direct page
lda ##.word2 _NearBaseAddress lda ##.word2 _NearBaseAddress
stz dp:.tiny(_Vfp+2) stz dp:.tiny(_Vfp+2)
xba ; A upper half = data bank xba ; A upper half = data bank
@ -82,7 +89,6 @@ delay_y
plb ; set data bank plb ; set data bank
;;; **** Initialize data sections if needed. ;;; **** Initialize data sections if needed.
.section boot, noroot, noreorder
.pubweak __data_initialization_needed .pubweak __data_initialization_needed
.extern __initialize_sections .extern __initialize_sections
@ -98,7 +104,6 @@ __data_initialization_needed:
jsl long:__initialize_sections jsl long:__initialize_sections
;;; **** Initialize streams if needed. ;;; **** Initialize streams if needed.
.section boot, noroot, noreorder
.pubweak __call_initialize_global_streams .pubweak __call_initialize_global_streams
.extern __initialize_global_streams .extern __initialize_global_streams
@ -106,7 +111,6 @@ __call_initialize_global_streams:
jsl long:__initialize_global_streams jsl long:__initialize_global_streams
;;; **** Initialize heap if needed. ;;; **** Initialize heap if needed.
.section boot, noroot, noreorder
.pubweak __call_heap_initialize .pubweak __call_heap_initialize
.extern __heap_initialize, __default_heap .extern __heap_initialize, __default_heap
@ -123,7 +127,6 @@ __call_heap_initialize:
lda ##.word0 (.sectionSize heap) lda ##.word0 (.sectionSize heap)
jsl long:__heap_initialize jsl long:__heap_initialize
.section boot, root, noreorder
lda ##0 ; argc = 0 lda ##0 ; argc = 0
jsl long:main jsl long:main
stp stp

103
src/kernel/hardware/vera/vera.c
View File

@ -10,50 +10,36 @@
#include "kernel/hardware/vera.h" #include "kernel/hardware/vera.h"
#include "kernel/util/delay.h" #include "kernel/util/delay.h"
static uint8_t *vera_ctrl = (uint8_t *)(VERA_CTRL);
static uint8_t *vera_addr_l = (uint8_t *)(VERA_ADDRx_L);
static uint8_t *vera_addr_m = (uint8_t *)(VERA_ADDRx_M);
static uint8_t *vera_addr_h = (uint8_t *)(VERA_ADDRx_H);
static uint8_t *vera_data_0 = (uint8_t *)(VERA_DATA_0);
extern uint16_t *vera_palette; extern uint16_t *vera_palette;
extern uint8_t vera_font_0[]; extern uint8_t vera_font_0;
void vera_address_select(uint8_t value) { void vera_address_select(uint8_t value) {
if (value % 2 == 0) { uint8_t ctrl = vera_ctrl_read();
*vera_ctrl &= 0b11111110;
if ((value & 0b00000001) == 0) {
ctrl &= 0b11111110;
} else { } else {
*vera_ctrl |= 0b00000001; ctrl |= 0b00000001;
} }
vera_ctrl_write(ctrl);
} }
void vera_address_set(uint32_t address) { void vera_address_set(uint32_t address) {
*vera_addr_l = (uint8_t)(address & 0x0000FF); vera_addr_l_write(address & 0x0000FF);
*vera_addr_m = (uint8_t)((address & 0x00FF00) >> 8); vera_addr_m_write((address & 0x00FF00) >> 8);
*vera_addr_h = (uint8_t)(address >> 16); vera_addr_h_write((address & 0xFF0000) >> 16);
}
uint8_t vera_reg_read(uint32_t regnum) {
uint8_t *reg = (uint8_t *)((uint32_t)(regnum));
return *reg;
}
void vera_reg_write(uint32_t regnum, uint8_t value) {
uint8_t *reg = (uint8_t *)((uint32_t)(regnum));
*reg = value;
} }
void vera_mem_read(void *dest, uint32_t src, size_t length) { void vera_mem_read(void *dest, uint32_t src, size_t length) {
uint8_t *destination = dest;
vera_address_select(0); vera_address_select(0);
vera_address_set(src | AUTO_INC_1); vera_address_set(src | AUTO_INC_1);
uint8_t *destination = dest; for (size_t count = 0; count < length; count += 1) {
*destination = vera_data_0_read();
for (size_t i = 0; i < length; i += 1, destination += 1) {
*destination = *vera_data_0;
} }
} }
@ -61,10 +47,8 @@ void vera_mem_write(uint32_t dest, void *src, size_t length) {
vera_address_select(0); vera_address_select(0);
vera_address_set(dest | AUTO_INC_1); vera_address_set(dest | AUTO_INC_1);
uint8_t *source = src; for (size_t count = 0; count < length; count += 1) {
vera_data_0_write(*((uint8_t *)(src)));
for (size_t i = 0; i < length; i += 1, source += 1) {
*vera_data_0 = *source;
} }
} }
@ -72,8 +56,8 @@ void vera_mem_set(uint32_t dest, uint8_t value, size_t length) {
vera_address_select(0); vera_address_select(0);
vera_address_set(dest | AUTO_INC_1); vera_address_set(dest | AUTO_INC_1);
for (size_t i = 0; i < length; i += 1) { for (size_t count = 0; count < length; count += 1) {
*vera_data_0 = value; vera_data_0_write(value);
} }
} }
@ -81,57 +65,16 @@ void vera_mem_clear(uint32_t dest, size_t length) {
vera_address_select(0); vera_address_select(0);
vera_address_set(dest | AUTO_INC_1); vera_address_set(dest | AUTO_INC_1);
for (size_t i = 0; i < length; i += 1) { for (size_t count = 0; count < length; count += 1) {
*vera_data_0 = 0x00; vera_data_0_write(0x00);
} }
} }
// Pull the VERA reset line (P4.2) low, hold it for a bit, then let it
// go high.
void vera_reset(void) { void vera_reset(void) {
__asm("\n" uint8_t ctrl = vera_ctrl_read();
" sep #0x20\n" vera_ctrl_write(ctrl | (1 << 7));
" lda #1 << 2\n"
" trb 0x00DF20\n"
" rep #0x20\n"
);
delay(1);
__asm("\n"
" sep #0x20\n"
" lda #1 << 2\n"
" tsb 0x00DF20\n"
" rep #0x20\n"
);
delay(1);
} }
void vera_init(void) { void vera_init(void) {
vera_reset(); vera_reset();
vera_mem_write(VERA_PALETTE_BASE, vera_palette, 0x200);
vera_mem_write(TEXT_CONSOLE_TILES, vera_font_0, 0x1000);
vera_reg_write(VERA_DC_HSCALE, 0x80);
vera_reg_write(VERA_DC_VSCALE, 0x80);
vera_reg_write(VERA_L0_CONFIG, VERA_L_BPP1 | VERA_L_64H | VERA_L_128W);
vera_reg_write(VERA_L0_MAPBASE, TEXT_CONSOLE0_VRAM >> 9);
vera_reg_write(VERA_L0_TILEBASE, ((TEXT_CONSOLE_TILES >> 9) & 0b11111100) | VERA_TILESIZE8x16);
vera_reg_write(VERA_L0_HSCROLL_H, 0);
vera_reg_write(VERA_L0_HSCROLL_L, 0);
vera_reg_write(VERA_L0_VSCROLL_H, 0);
vera_reg_write(VERA_L0_HSCROLL_L, 0);
uint8_t ien_value = vera_reg_read(VERA_IEN) | 0b00000001;
vera_reg_write(VERA_IEN, ien_value);
uint8_t isr_value = vera_reg_read(VERA_ISR) | 0b00000001;
vera_reg_write(VERA_ISR, isr_value);
uint8_t dc_vid_value = vera_reg_read(VERA_DC_VIDEO) | 0b00010001;
vera_reg_write(VERA_DC_VIDEO, dc_vid_value);
} }

2
src/kernel/main.c
View File

@ -16,7 +16,7 @@ void main(void) {
led_init(); led_init();
vera_reset(); vera_init();
for (;;) { for (;;) {
led_red_on(); led_red_on();