mirror of
https://github.com/V2RetroComputing/analog.git
synced 2024-06-01 02:41:30 +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
108 lines
2.9 KiB
C
108 lines
2.9 KiB
C
#include "serial/serialbuffer.h"
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volatile uint8_t *serial_reg = apple_memory + 0xC0A0;
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volatile uint8_t *serial_rx_fifo = private_memory + 0;
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volatile uint8_t serial_rx_wrptr;
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volatile uint8_t serial_rx_rdptr;
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volatile uint8_t *serial_tx_fifo = private_memory + 0x100;
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volatile uint8_t serial_tx_wrptr;
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volatile uint8_t serial_tx_rdptr;
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void serial_rx_advance() {
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if(serial_rx_rdptr != serial_rx_wrptr) {
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serial_rx_rdptr++;
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serial_reg[8] = serial_rx_fifo[serial_rx_rdptr];
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}
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// RXFULL : 6551 has byte(s) ready from RX
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if(serial_rx_wrptr == serial_rx_rdptr) {
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serial_reg[9] &= ~ACIA_STATUS_RXFULL;
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} else {
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serial_reg[9] |= ACIA_STATUS_RXFULL;
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}
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}
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void serial_rx_push(uint8_t value) {
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if((serial_rx_wrptr+1) != serial_rx_rdptr) {
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serial_rx_fifo[serial_rx_wrptr] = value;
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if(serial_rx_wrptr == serial_rx_rdptr) {
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serial_reg[8] = value;
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}
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serial_rx_wrptr++;
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} else {
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serial_reg[9] |= ACIA_STATUS_RXOVER;
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}
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// RXFULL : 6551 has byte(s) ready from RX
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if(serial_rx_wrptr == serial_rx_rdptr) {
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serial_reg[9] &= ~ACIA_STATUS_RXFULL;
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} else {
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serial_reg[9] |= ACIA_STATUS_RXFULL;
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}
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}
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int serial_tx_empty() {
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return serial_rx_rdptr == serial_rx_wrptr;
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}
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uint8_t serial_tx_pop() {
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uint8_t retval;
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if(serial_rx_rdptr != serial_rx_wrptr) {
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retval = serial_rx_fifo[serial_rx_rdptr++];
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}
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// TXEMTY : 6551 able to accept byte(s) for TX
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if((serial_tx_wrptr+1) == serial_tx_rdptr) {
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serial_reg[9] &= ~ACIA_STATUS_TXEMTY;
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} else {
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serial_reg[9] |= ACIA_STATUS_TXEMTY;
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}
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return retval;
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}
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void serial_tx_push(uint8_t value) {
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if((serial_tx_wrptr+1) != serial_tx_rdptr) {
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serial_tx_fifo[serial_tx_wrptr] = value;
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serial_tx_wrptr++;
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}
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// TXEMTY : 6551 able to accept byte(s) for TX
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if((serial_tx_wrptr+1) == serial_tx_rdptr) {
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serial_reg[9] &= ~ACIA_STATUS_TXEMTY;
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} else {
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serial_reg[9] |= ACIA_STATUS_TXEMTY;
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}
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}
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void serial_fifo_init() {
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serial_rx_wrptr = 0;
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serial_rx_rdptr = 0;
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serial_tx_wrptr = 0;
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serial_tx_rdptr = 0;
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serial_reg[0x0] = 0xFF;
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serial_reg[0x1] = 0x02; // Dip Switch 2 : 8N1, No Auto CR after LF,
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serial_reg[0x2] = 0xE0; // Dip Switch 1 : 9600 Baud Communications Mode
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serial_reg[0x3] = 0xFF;
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serial_reg[0x4] = 0xFF;
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serial_reg[0x5] = 0xFF;
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serial_reg[0x6] = 0xFF;
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serial_reg[0x7] = 0xFF;
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serial_reg[0x8] = 0x00; // Read/Write Data Register
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serial_reg[0x9] = 0x10; // Status/Reset Register
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serial_reg[0xA] = 0x0A; // Command Register
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serial_reg[0xB] = 0x1E; // Control Register
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serial_reg[0xC] = 0xFF;
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serial_reg[0xD] = 0xFF;
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serial_reg[0xE] = 0xFF;
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serial_reg[0xF] = 0xFF;
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}
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