From 0cf651ff952ad84897118ae53417bd61642f95e2 Mon Sep 17 00:00:00 2001 From: OBattler Date: Tue, 30 Mar 2021 00:37:09 +0200 Subject: [PATCH] Bit 0 to 4 of LSR are now all writeable, always, fixes Error D on the IBM PCjr. --- src/device/serial.c | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-) diff --git a/src/device/serial.c b/src/device/serial.c index 4cda5841f..25c9c0a49 100644 --- a/src/device/serial.c +++ b/src/device/serial.c @@ -484,16 +484,14 @@ serial_write(uint16_t addr, uint8_t val, void *p) } break; case 5: - if (dev->mctrl & 0x10) { - dev->lsr = (dev->lsr & 0xe3) | (val & 0x1c); - if (dev->lsr & 0x01) - dev->int_status |= SERIAL_INT_RECEIVE; - if (dev->lsr & 0x1e) - dev->int_status |= SERIAL_INT_LSR; - if (dev->lsr & 0x20) - dev->int_status |= SERIAL_INT_TRANSMIT; - serial_update_ints(dev); - } + dev->lsr = (dev->lsr & 0xe0) | (val & 0x1f); + if (dev->lsr & 0x01) + dev->int_status |= SERIAL_INT_RECEIVE; + if (dev->lsr & 0x1e) + dev->int_status |= SERIAL_INT_LSR; + if (dev->lsr & 0x20) + dev->int_status |= SERIAL_INT_TRANSMIT; + serial_update_ints(dev); break; case 6: dev->msr = val;