diff -Nru seabios-1.16.3/debian/changelog seabios-1.16.3/debian/changelog
--- seabios-1.16.3/debian/changelog	2023-11-28 09:05:35.000000000 +0000
+++ seabios-1.16.3/debian/changelog	2023-11-30 17:20:26.000000000 +0000
@@ -1,3 +1,14 @@
+seabios (1.16.3-2) unstable; urgency=medium
+
+  * d/rules: turn off LSI_SCSI and DEBUG_IO for 128k bios variant.
+    these are probably the last bits which can be turned off before
+    we will start breaking old versions of qemu.  upstream qemu
+    turned off all pci devices for 128k bios variant, leaving only
+    stuff needed for -M isapc, since it dropped <1.7 machines
+    compatibility
+
+ -- Michael Tokarev <mjt@tls.msk.ru>  Thu, 30 Nov 2023 20:20:26 +0300
+
 seabios (1.16.3-1) unstable; urgency=medium
 
   * new upstream release (rel-1.16.3)
diff -Nru seabios-1.16.3/debian/rules seabios-1.16.3/debian/rules
--- seabios-1.16.3/debian/rules	2022-11-18 17:13:21.000000000 +0000
+++ seabios-1.16.3/debian/rules	2023-11-30 17:16:29.000000000 +0000
@@ -40,7 +40,8 @@
 	echo "EXTRAVERSION=-debian-$$(dpkg-parsechangelog -SVersion)" > $@
 
 # A stripped-down version of bios, to fit in 128Kb, for qemu <= 1.7
-bios-config = QEMU=y ROM_SIZE=128 PVSCSI=n ATA_DMA=n BOOTSPLASH=n XEN=n USB_OHCI=n USB_XHCI=n USB_UAS=n SDCARD=n TCGBIOS=n MPT_SCSI=n ESP_SCSI=n MEGASAS=n NVME=n USE_SMM=n VGAHOOKS=n HOST_BIOS_GEOMETRY=n ACPI_PARSE=n
+bios-config = QEMU=y ROM_SIZE=128 PVSCSI=n ATA_DMA=n BOOTSPLASH=n XEN=n USB_OHCI=n USB_XHCI=n USB_UAS=n SDCARD=n TCGBIOS=n MPT_SCSI=n ESP_SCSI=n MEGASAS=n NVME=n USE_SMM=n VGAHOOKS=n HOST_BIOS_GEOMETRY=n ACPI_PARSE=n \
+  LSI_SCSI=n DEBUG_IO=n
 bios-256k-config = QEMU=y ROM_SIZE=256
 bios-microvm-config = QEMU=y ROM_SIZE=128 XEN=n BOOTSPLASH=n ATA=n AHCI=n SDCARD=n PVSCSI=n ESP_SCSI=n LSI_SCSI=n MEGASAS=n MPT_SCSI=n FLOPPY=n FLASH_FLOPPY=n NVME=n PS2PORT=n USB=n LPT=n RTC_TIMER=n USE_SMM=n PMTIMER=n TCGBIOS=n HARDWARE_IRQ=n ACPI_PARSE=y