Mercurial > repos > blastem
annotate jcart.c @ 2493:b62336ceb626 default tip
Kinda hacky fix to make sure Nuklear has the right GL context
| author | Michael Pavone <pavone@retrodev.com> |
|---|---|
| date | Wed, 17 Apr 2024 22:18:45 -0700 |
| parents | 395f684c5379 |
| children |
| rev | line source |
|---|---|
|
1688
395f684c5379
Fixed the most glaring issues in libretro build
Mike Pavone <pavone@retrodev.com>
parents:
1612
diff
changeset
|
1 #include <stdlib.h> |
| 1610 | 2 #include "genesis.h" |
| 3 | |
| 4 static io_port *get_ports(m68k_context *m68k) | |
| 5 { | |
| 6 genesis_context *gen = m68k->system; | |
| 7 if (!gen->extra) { | |
| 8 io_port *ports = calloc(2, sizeof(io_port)); | |
| 9 ports[0].device_type = IO_GAMEPAD3; | |
| 10 ports[0].device.pad.gamepad_num = 3; | |
| 11 ports[1].device_type = IO_GAMEPAD3; | |
| 12 ports[1].device.pad.gamepad_num = 4; | |
| 13 io_control_write(ports, 0x40, 0); | |
| 14 io_control_write(ports + 1, 0x40, 0); | |
| 15 gen->extra = ports; | |
| 16 } | |
| 17 | |
| 18 return gen->extra; | |
| 19 } | |
| 20 | |
| 21 void *jcart_write_w(uint32_t address, void *context, uint16_t value) | |
| 22 { | |
| 23 m68k_context *m68k= context; | |
| 24 io_port *ports = get_ports(m68k); | |
| 25 value = value << 6 & 0x40; | |
| 26 io_data_write(ports, value, m68k->current_cycle); | |
| 27 io_data_write(ports + 1, value, m68k->current_cycle); | |
| 28 return context; | |
| 29 } | |
| 30 | |
| 31 void *jcart_write_b(uint32_t address, void *context, uint8_t value) | |
| 32 { | |
| 33 if (address & 1) { | |
| 34 return jcart_write_w(address, context, value); | |
| 35 } | |
| 36 return context; | |
| 37 } | |
| 38 | |
| 39 uint16_t jcart_read_w(uint32_t address, void *context) | |
| 40 { | |
| 41 m68k_context *m68k= context; | |
| 42 io_port *ports = get_ports(m68k); | |
| 43 //according to Eke, bit 14 is forced low, at least on the Micro Machines 2 cart | |
| 44 //TODO: Test behavior of actual cart | |
|
1612
28ec17387be5
Remove stray / in jcart.c
Michael Pavone <pavone@retrodev.com>
parents:
1610
diff
changeset
|
45 uint16_t value = io_data_read(ports, m68k->current_cycle) << 8; |
| 1610 | 46 value |= io_data_read(ports + 1, m68k->current_cycle); |
| 47 return value; | |
| 48 } | |
| 49 | |
| 50 uint8_t jcart_read_b(uint32_t address, void *context) | |
| 51 { | |
| 52 m68k_context *m68k= context; | |
| 53 io_port *ports = get_ports(m68k); | |
| 54 return io_data_read(ports + (address & 1), m68k->current_cycle); | |
| 55 } | |
| 56 | |
| 57 void jcart_adjust_cycles(genesis_context *context, uint32_t deduction) | |
| 58 { | |
| 59 io_port *ports = get_ports(context->m68k); | |
| 60 io_adjust_cycles(ports, context->m68k->current_cycle, deduction); | |
| 61 io_adjust_cycles(ports + 1, context->m68k->current_cycle, deduction); | |
| 62 } | |
| 63 | |
| 64 void jcart_gamepad_down(genesis_context *context, uint8_t gamepad_num, uint8_t button) | |
| 65 { | |
| 66 io_port *ports = get_ports(context->m68k); | |
| 67 if (gamepad_num == ports[1].device.pad.gamepad_num) { | |
| 68 ports++; | |
| 69 } else if (gamepad_num != ports[0].device.pad.gamepad_num) { | |
| 70 ports = NULL; | |
| 71 } | |
| 72 if (ports) { | |
| 73 io_port_gamepad_down(ports, button); | |
| 74 } | |
| 75 } | |
| 76 | |
| 77 void jcart_gamepad_up(genesis_context *context, uint8_t gamepad_num, uint8_t button) | |
| 78 { | |
| 79 io_port *ports = get_ports(context->m68k); | |
| 80 if (gamepad_num == ports[1].device.pad.gamepad_num) { | |
| 81 ports++; | |
| 82 } else if (gamepad_num != ports[0].device.pad.gamepad_num) { | |
| 83 ports = NULL; | |
| 84 } | |
| 85 if (ports) { | |
| 86 io_port_gamepad_up(ports, button); | |
| 87 } | |
| 88 } |