Re-implemented UM8669F emulation.
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SarahW
parent
b0215f309a
commit
668a0dd18d
1 changed files with 157 additions and 85 deletions
244
src/um8669f.c
244
src/um8669f.c
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@ -5,36 +5,21 @@
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data read/write to 109
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55 to 108 locks
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C0
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bit 3 = LPT1 enable
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bit 2 = COM2 enable
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bit 1 = COM1 enable
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bit 0 = FDC enable
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C1
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bits 7-6 = LPT1 mode : 11 = ECP/EPP, 01 = EPP, 10 = SPP
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bit 3 = clear when LPT1 = 278
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bit 7 - enable PnP registers
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C3
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bits 7-6 = LPT1 DMA mode : 11 = ECP/EPP DMA1, 10 = ECP/EPP DMA3, 01 = EPP/SPP, 00 = ECP
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bits 5-4 = LPT1 addr : 10 = 278/IRQ5, 01 = 3BC/IRQ7, 00 = 378/IRQ7
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PnP registers :
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COM1 :
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3f8, IRQ4 - C1 = BF, C3 = 00
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2f8, IRQ3 - C1 = BF, C3 = 03
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3e8, IRQ4 - C1 = BD, C3 = 00
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2e8, IRQ3 - B1 = BD, C3 = 03
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COM2 :
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3f8, IRQ4 - C1 = BF, C3 = 0C
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2f8, IRQ3 - C1 = BF, C3 = 00
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3e8, IRQ4 - C1 = BB, C3 = 0C
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2e8, IRQ3 - C1 = BB, C3 = 00
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*/
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07 - device :
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0 = FDC
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1 = COM1
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2 = COM2
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3 = LPT1
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5 = Game port
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30 - enable
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60/61 - addr
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70 - IRQ
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74 - DMA*/
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#include "ibm.h"
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@ -44,91 +29,178 @@ COM2 :
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#include "serial.h"
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#include "um8669f.h"
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static int um8669f_locked;
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static int um8669f_curreg;
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static uint8_t um8669f_regs[256];
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void um8669f_write(uint16_t port, uint8_t val, void *priv)
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typedef struct um8669f_t
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{
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int temp;
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// pclog("um8669f_write : port=%04x reg %02X = %02X locked=%i\n", port, um8669f_curreg, val, um8669f_locked);
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if (um8669f_locked)
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int locked;
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int cur_reg_108;
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uint8_t regs_108[256];
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int cur_reg;
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int cur_device;
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struct
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{
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int enable;
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uint16_t addr;
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int irq;
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int dma;
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} dev[8];
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} um8669f_t;
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static um8669f_t um8669f_global;
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#define DEV_FDC 0
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#define DEV_COM1 1
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#define DEV_COM2 2
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#define DEV_LPT1 3
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#define DEV_GAME 5
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#define REG_DEVICE 0x07
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#define REG_ENABLE 0x30
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#define REG_ADDRHI 0x60
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#define REG_ADDRLO 0x61
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#define REG_IRQ 0x70
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#define REG_DMA 0x74
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void um8669f_pnp_write(uint16_t port, uint8_t val, void *p)
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{
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um8669f_t *um8669f = (um8669f_t *)p;
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if (port == 0x279)
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um8669f->cur_reg = val;
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else
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{
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if (um8669f->cur_reg == REG_DEVICE)
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um8669f->cur_device = val & 7;
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else
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{
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// pclog("Write UM8669F %02x [%02x] %02x\n", um8669f->cur_reg, um8669f->cur_device, val);
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switch (um8669f->cur_reg)
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{
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case REG_ENABLE:
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um8669f->dev[um8669f->cur_device].enable = val;
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break;
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case REG_ADDRLO:
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um8669f->dev[um8669f->cur_device].addr = (um8669f->dev[um8669f->cur_device].addr & 0xff00) | val;
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break;
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case REG_ADDRHI:
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um8669f->dev[um8669f->cur_device].addr = (um8669f->dev[um8669f->cur_device].addr & 0x00ff) | (val << 8);
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break;
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case REG_IRQ:
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um8669f->dev[um8669f->cur_device].irq = val;
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break;
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case REG_DMA:
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um8669f->dev[um8669f->cur_device].dma = val;
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break;
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}
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switch (um8669f->cur_device)
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{
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case DEV_FDC:
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fdc_remove();
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if (um8669f->dev[DEV_FDC].enable & 1)
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fdc_add();
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break;
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case DEV_COM1:
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serial1_remove();
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if (um8669f->dev[DEV_COM1].enable & 1)
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serial1_set(um8669f->dev[DEV_COM1].addr, um8669f->dev[DEV_COM1].irq);
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break;
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case DEV_COM2:
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serial2_remove();
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if (um8669f->dev[DEV_COM2].enable & 1)
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serial2_set(um8669f->dev[DEV_COM2].addr, um8669f->dev[DEV_COM2].irq);
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break;
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case DEV_LPT1:
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lpt1_remove();
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lpt2_remove();
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if (um8669f->dev[DEV_LPT1].enable & 1)
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lpt1_init(um8669f->dev[DEV_LPT1].addr);
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break;
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}
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}
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}
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}
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uint8_t um8669f_pnp_read(uint16_t port, void *p)
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{
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um8669f_t *um8669f = (um8669f_t *)p;
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// pclog("Read UM8669F %02x\n", um8669f->cur_reg);
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switch (um8669f->cur_reg)
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{
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case REG_DEVICE:
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return um8669f->cur_device;
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case REG_ENABLE:
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return um8669f->dev[um8669f->cur_device].enable;
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case REG_ADDRLO:
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return um8669f->dev[um8669f->cur_device].addr & 0xff;
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case REG_ADDRHI:
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return um8669f->dev[um8669f->cur_device].addr >> 8;
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case REG_IRQ:
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return um8669f->dev[um8669f->cur_device].irq;
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case REG_DMA:
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return um8669f->dev[um8669f->cur_device].dma;
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}
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return 0xff;
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}
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void um8669f_write(uint16_t port, uint8_t val, void *p)
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{
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um8669f_t *um8669f = (um8669f_t *)p;
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if (um8669f->locked)
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{
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if (port == 0x108 && val == 0xaa)
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um8669f_locked = 0;
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um8669f->locked = 0;
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}
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else
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{
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if (port == 0x108)
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{
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if (val == 0x55)
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um8669f_locked = 1;
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um8669f->locked = 1;
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else
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um8669f_curreg = val;
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um8669f->cur_reg_108 = val;
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}
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else
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{
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um8669f_regs[um8669f_curreg] = val;
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// pclog("Write UM8669f register %02x %02x %04x:%04x %i\n", um8669f_curreg, val, CS,cpu_state.pc, ins);
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um8669f->regs_108[um8669f->cur_reg_108] = val;
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fdc_remove();
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if (um8669f_regs[0xc0] & 1)
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fdc_add();
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if (um8669f_regs[0xc0] & 2)
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io_removehandler(0x0279, 0x0001, NULL, NULL, NULL, um8669f_pnp_write, NULL, NULL, um8669f);
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io_removehandler(0x0a79, 0x0001, NULL, NULL, NULL, um8669f_pnp_write, NULL, NULL, um8669f);
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io_removehandler(0x03e3, 0x0001, um8669f_pnp_read, NULL, NULL, NULL, NULL, NULL, um8669f);
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if (um8669f->regs_108[0xc1] & 0x80)
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{
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temp = um8669f_regs[0xc3] & 1; /*might be & 2*/
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if (!(um8669f_regs[0xc1] & 2))
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temp |= 2;
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switch (temp)
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{
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case 0: serial1_set(0x3f8, 4); break;
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case 1: serial1_set(0x2f8, 4); break;
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case 2: serial1_set(0x3e8, 4); break;
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case 3: serial1_set(0x2e8, 4); break;
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}
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}
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if (um8669f_regs[0xc0] & 4)
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{
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temp = (um8669f_regs[0xc3] & 4) ? 0 : 1; /*might be & 8*/
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if (!(um8669f_regs[0xc1] & 4))
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temp |= 2;
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switch (temp)
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{
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case 0: serial2_set(0x3f8, 3); break;
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case 1: serial2_set(0x2f8, 3); break;
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case 2: serial2_set(0x3e8, 3); break;
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case 3: serial2_set(0x2e8, 3); break;
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}
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}
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lpt1_remove();
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lpt2_remove();
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temp = (um8669f_regs[0xc3] >> 4) & 3;
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switch (temp)
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{
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case 0: lpt1_init(0x378); break;
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case 1: lpt1_init(0x3bc); break;
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case 2: lpt1_init(0x278); break;
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io_sethandler(0x0279, 0x0001, NULL, NULL, NULL, um8669f_pnp_write, NULL, NULL, um8669f);
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io_sethandler(0x0a79, 0x0001, NULL, NULL, NULL, um8669f_pnp_write, NULL, NULL, um8669f);
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io_sethandler(0x03e3, 0x0001, um8669f_pnp_read, NULL, NULL, NULL, NULL, NULL, um8669f);
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}
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}
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}
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}
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uint8_t um8669f_read(uint16_t port, void *priv)
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uint8_t um8669f_read(uint16_t port, void *p)
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{
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// pclog("um8669f_read : port=%04x reg %02X locked=%i\n", port, um8669f_curreg, um8669f_locked);
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if (um8669f_locked)
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return 0xff;
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um8669f_t *um8669f = (um8669f_t *)p;
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// pclog("um8669f_read : port=%04x reg %02X locked=%i %02x\n", port, um8669f_curreg, um8669f_locked, um8669f_regs[um8669f_curreg]);
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if (um8669f->locked)
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return 0xff;
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if (port == 0x108)
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return um8669f_curreg; /*???*/
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return um8669f->cur_reg_108; /*???*/
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else
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return um8669f_regs[um8669f_curreg];
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return um8669f->regs_108[um8669f->cur_reg_108];
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}
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void um8669f_init()
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{
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io_sethandler(0x0108, 0x0002, um8669f_read, NULL, NULL, um8669f_write, NULL, NULL, NULL);
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um8669f_locked = 1;
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memset(&um8669f_global, 0, sizeof(um8669f_t));
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um8669f_global.locked = 1;
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io_sethandler(0x0108, 0x0002, um8669f_read, NULL, NULL, um8669f_write, NULL, NULL, &um8669f_global);
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}
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