pc98_usb: Update reset and LED control command
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tmk
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cb1f428488
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5d24932e78
3 changed files with 68 additions and 34 deletions
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@ -147,6 +147,7 @@ Its scan code map is very different from standard types. This is not tested.
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Other PC98 converter projects and resource
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------------------------------------------
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PC-9800シリーズ テクニカルデータブック HARDWARE 編 1993年 p139, p343
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https://archive.org/stream/PC9800TechnicalDataBookHARDWARE1993/PC-9800TechnicalDataBook_HARDWARE1993#page/n151
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https://archive.org/stream/PC9800TechnicalDataBookHARDWARE1993/PC-9800TechnicalDataBook_HARDWARE1993#page/n355
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PC98 to USB
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@ -158,3 +159,25 @@ http://www.tsp.ne.jp/~sawada/mago/src/gka98at.asm
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scan code:
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http://ixsvr.dyndns.org/usb2pc98
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NOTES
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-----
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### Tested on
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- PC-9801V
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- DIGITAL WAVE Dboard
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### RDY
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Current firmware does not control RDY line and it is drived as low to receive data always. While sending command firmware drive the line high.
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PC98 host keeps RDY line high to prevent keyboard from sending data while processing.
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https://archive.org/stream/PC9800TechnicalDataBookHARDWARE1993/PC-9800TechnicalDataBook_HARDWARE1993#page/n359
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### Inhibit key repeating
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The command(9Ch, 70h) works with Raku Raku keybaord but not with Dboard.
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### LED indicater
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Dboard has LEDs but it seems to ignore LED control command.
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@ -43,7 +43,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
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#define LOCKING_RESYNC_ENABLE
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/* Control LED indicatiors, which doesn't work well with locking support */
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//#define PC98_LED_CONTROL
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#define PC98_LED_CONTROL
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/* PC98 Reset Port shared with TXD */
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@ -68,23 +68,34 @@ static int16_t pc98_wait_response(void)
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static void pc98_inhibit_repeat(void)
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{
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uint16_t code;
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// clear recv buffer
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while (serial_recv()) ;
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RETRY:
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_delay_ms(100);
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pc98_send(0x9C);
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code = pc98_wait_response();
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if (code != -1) xprintf("PC98: send 9C: %02X\n", code);
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if (code != 0xFA) goto RETRY;
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_delay_ms(100);
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pc98_send(0x70);
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code = pc98_wait_response();
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if (code != -1) xprintf("PC98: send 70: %02X\n", code);
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if (code != 0xFA) goto RETRY;
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}
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static uint8_t pc98_led = 0;
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static void pc98_led_set(void)
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{
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uint16_t code;
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RETRY:
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pc98_send(0x9D);
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code = pc98_wait_response();
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if (code != -1) xprintf("PC98: send 9D: %02X\n", code);
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if (code != 0xFA) goto RETRY;
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pc98_send(pc98_led);
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code = pc98_wait_response();
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if (code != -1) xprintf("PC98: send %02X: %02X\n", pc98_led, code);
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if (code != 0xFA) goto RETRY;
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}
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void matrix_init(void)
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{
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debug_keyboard = true;
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@ -99,36 +110,40 @@ void matrix_init(void)
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serial_init();
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// PC98 reset
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/*
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PC98_RST_PORT &= ~(1<<PC98_RST_BIT);
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_delay_us(15);
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PC98_RST_PORT |= (1<<PC98_RST_BIT);
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_delay_us(13);
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PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT);
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*/
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// https://archive.org/stream/PC9800TechnicalDataBookHARDWARE1993/PC-9800TechnicalDataBook_HARDWARE1993#page/n359
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PC98_RDY_PORT |= (1<<PC98_RDY_BIT); // RDY: high
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PC98_RST_PORT &= ~(1<<PC98_RST_BIT); // RST: low
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_delay_us(15); // > 13us
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PC98_RST_PORT |= (1<<PC98_RST_BIT); // RST: high
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_delay_ms(500);
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_delay_ms(50);
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pc98_inhibit_repeat();
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// PC98 ready
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PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT);
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// initialize matrix state: all keys off
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for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
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debug("init\n");
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// ready to receive from keyboard
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PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT); // RDY: low
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print("matrix_init done.\n");
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return;
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}
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uint8_t matrix_scan(void)
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{
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uint16_t code;
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PC98_RDY_PORT |= (1<<PC98_RDY_BIT);
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//_delay_us(30);
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code = serial_recv2();
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PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT);
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if (code == -1) return 0;
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if (code == -1) {
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#ifdef PC98_LED_CONTROL
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// Before sending command we have to make sure that there is no unprocessed key in queue
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// otherwise keys will be missed during sending command
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if (pc98_led) {
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pc98_led_set();
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pc98_led = 0;
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}
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#endif
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return 0;
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}
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print_hex8(code); print(" ");
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@ -154,15 +169,11 @@ uint8_t matrix_get_row(uint8_t row)
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void led_set(uint8_t usb_led)
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{
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#ifdef PC98_LED_CONTROL
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uint8_t led_state = 0x70;
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if (usb_led & (1<<USB_LED_NUM_LOCK)) led_state |= (1<<0);
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if (usb_led & (1<<USB_LED_CAPS_LOCK)) led_state |= (1<<2);
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xprintf("led_set: %02X\n", led_state);
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pc98_send(0x9D);
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_delay_ms(100);
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pc98_send(led_state);
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// responses(FA or FC) will be ignored in matrix_scan()
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#endif
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// https://archive.org/stream/PC9800TechnicalDataBookHARDWARE1993/PC-9800TechnicalDataBook_HARDWARE1993#page/n161
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// http://www.webtech.co.jp/company/doc/undocumented_mem/io_kb.txt
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pc98_led = 0x70;
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if (usb_led & (1<<USB_LED_NUM_LOCK)) pc98_led |= (1<<0);
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if (usb_led & (1<<USB_LED_CAPS_LOCK)) pc98_led |= (1<<2);
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xprintf("usb_led: %02X\n", usb_led);
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xprintf("pc98_led: %02X\n", pc98_led);
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}
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