mirror of
https://github.com/V2RetroComputing/analog.git
synced 2024-06-06 04:29:32 +00:00
0835003caa
Progress on PCPI mode bug fixes. PCPI mode is now working again, but the config interface is still broken enough to prevent the use of the config utility while in this mode.. Sending the FORMAT command from the monitor rom returns the card to defaults. Replace n with the slot number the card is installed in: ]CALL -151 *CnF0:46 4F 52 4D 41 54 00 00 Correction of mousetext / inverse / flashing handling on IIe see https://github.com/V2RetroComputing/analog/issues/3 Monochrome mode & color palettes are now implemented. $C0n1: Monochrome mode & palette $80: B&W $90: Inverse $A0: Amber $B0: Inverse Amber $C0: Green $D0: Inverse Green $E0: Commodore 64 Theme $F0: Use IIgs palette $C0n2: Mirror of IIgs TBCOLOR register $C0n3: Mirror of IIgs BORDER register
65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
#include <string.h>
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#include <hardware/pio.h>
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#include "common/config.h"
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#include "common/buffers.h"
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#include "abus.pio.h"
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#include "z80/businterface.h"
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#include "z80/z80buf.h"
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volatile uint8_t *pcpi_reg = apple_memory + 0xC0C0;
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static inline void __time_critical_func(pcpi_read)(uint32_t address) {
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switch(address & 0x7) {
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case 0: // Read Data from Z80
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clr_6502_stat;
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break;
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case 5: // Z80 Reset
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z80_res = 1;
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break;
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case 6: // Z80 INT
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//z80_irq = 1;
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break;
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case 7: // Z80 NMI
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z80_nmi = 1;
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break;
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}
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}
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static inline void __time_critical_func(pcpi_write)(uint32_t address, uint32_t value) {
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switch(address & 0x7) {
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case 0:
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case 2:
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case 3:
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case 4:
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break;
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case 1: // Write Data to Z80
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pcpi_reg[1] = value & 0xff;
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set_z80_stat;
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break;
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case 5:
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case 6:
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case 7:
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pcpi_read(address);
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break;
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}
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}
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void __time_critical_func(z80_businterface)(uint32_t address, uint32_t value) {
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// Reset the Z80 when the Apple II resets
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if(reset_state == 3) z80_res = 1;
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// Shadow parts of the Apple's memory by observing the bus write cycles
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if(CARD_SELECT) {
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if(CARD_DEVSEL) {
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pcpi_reg = apple_memory + (address & 0xFFF0);
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if((value & (1u << CONFIG_PIN_APPLEBUS_RW-CONFIG_PIN_APPLEBUS_DATA_BASE)) == 0) {
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pcpi_write(address, value);
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} else {
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pcpi_read(address);
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}
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}
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}
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}
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