diff --git a/CHANGELOG.md b/CHANGELOG.md
index 851caa540..8fa5589fa 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -29,6 +29,7 @@ mimpid = 0x01040312 -> Version 01.04.03.12 -> v1.4.3.12
 
 | Date | Version | Comment | Ticket |
 |:----:|:-------:|:--------|:------:|
+| 11.12.2024 | 1.10.7.1 | :test_tube: shrink bootloader's minimal ISA (`rv32e`) and RAM (256 bytes) requirements | [#1118](https://github.com/stnolting/neorv32/pull/1118) |
 | 10.12.2024 | [**:rocket:1.10.7**](https://github.com/stnolting/neorv32/releases/tag/v1.10.7) | **New release** | |
 | 03.12.2024 | 1.10.6.9 | :sparkles: add ONEWIRE command and data FIFO; :warning: rework ONEWIRE interface register layout; :bug: fix regression: busy flag was stuck at zero | [#1113](https://github.com/stnolting/neorv32/pull/1113) |
 | 01.12.2024 | 1.10.6.8 | add TWI bus sensing logic | [#1111](https://github.com/stnolting/neorv32/pull/1111) |
diff --git a/docs/datasheet/software_bootloader.adoc b/docs/datasheet/software_bootloader.adoc
index acd282789..5fca6a8a5 100644
--- a/docs/datasheet/software_bootloader.adoc
+++ b/docs/datasheet/software_bootloader.adoc
@@ -6,7 +6,14 @@
 This section refers to the **default** NEORV32 bootloader. A pre-compiled memory image for the processor-internal
 <<_bootloader_rom_bootrom>> is available in the project's +rtl+ folder: `rtl/core/neorv32_bootloader_image.vhd`.
 This image is automatically inserted into the boot ROM when synthesizing the processor with the bootloader being
-enabled. **Note that the default bootloader image was compiled for a minimal `rv32i` + priv. ISA!**
+enabled.
+
+.Minimal RISC-V ISA and Memory Configuration
+[NOTE]
+The default bootloader image was compiled for a minimal `rv32e_zicsr_zifencei` ISA configuration and only requires a
+RAM size of at least 256 bytes. Both constraints ensure that the bootloader can be executed by any actual CPU/processor
+configuration. However, the bootloader can recompiled with different capabilities. See the User Guide
+https://stnolting.github.io/neorv32/ug/#_customizing_the_internal_bootloader for more information.
 
 The NEORV32 bootloader (`sw/bootloader/bootloader.c`) provides an optional built-in firmware that
 allows to upload new application executables at _any time_ without the need to re-synthesize the FPGA's bitstream.
diff --git a/docs/userguide/customizing_the_bootloader.adoc b/docs/userguide/customizing_the_bootloader.adoc
index 32a4cbc48..af57e4e47 100644
--- a/docs/userguide/customizing_the_bootloader.adoc
+++ b/docs/userguide/customizing_the_bootloader.adoc
@@ -12,7 +12,7 @@ bootloader ROM) and the processor has to be re-synthesized.
 
 [NOTE]
 Keep in mind that the maximum size for the bootloader is limited to 8kB and it should be compiled using the
-minimal base & privileged ISA `rv32i_zicsr_zifencei` only to ensure it can work independently of the actual CPU configuration.
+minimal base & privileged ISA `rv32e_zicsr_zifencei` only to ensure it can work with any actual CPU configuration.
 
 .Bootloader configuration parameters
 [cols="<2,^1,^2,<6"]
diff --git a/rtl/core/neorv32_bootloader_image.vhd b/rtl/core/neorv32_bootloader_image.vhd
index 18487d5e4..fc41c72a7 100644
--- a/rtl/core/neorv32_bootloader_image.vhd
+++ b/rtl/core/neorv32_bootloader_image.vhd
@@ -1,8 +1,8 @@
 -- The NEORV32 RISC-V Processor - github.com/stnolting/neorv32
 -- Auto-generated memory initialization package (for internal BOOTROM)
--- Source: bootloader/main.bin
--- Size: 4072 bytes
--- Built: 31.10.2024 22:31:51
+-- Source: bootloader/build/main.bin
+-- Size: 3916 bytes
+-- Built: 11.12.2024 20:45:15
 
 library ieee;
 use ieee.std_logic_1164.all;
@@ -17,11 +17,11 @@ x"000020b7",
 x"80008093",
 x"30009073",
 x"00000097",
-x"0e408093",
+x"0a408093",
 x"30509073",
 x"30401073",
 x"80004217",
-x"1e320213",
+x"0e320213",
 x"ff027113",
 x"80004197",
 x"7d818193",
@@ -30,28 +30,12 @@ x"00000313",
 x"00000393",
 x"00000413",
 x"00000493",
-x"00000813",
-x"00000893",
-x"00000913",
-x"00000993",
-x"00000a13",
-x"00000a93",
-x"00000b13",
-x"00000b93",
-x"00000c13",
-x"00000c93",
-x"00000d13",
-x"00000d93",
-x"00000e13",
-x"00000e93",
-x"00000f13",
-x"00000f93",
 x"00001597",
-x"f6458593",
+x"f0858593",
 x"80004617",
-x"f7460613",
+x"fb460613",
 x"80004697",
-x"f6c68693",
+x"fac68693",
 x"00c58e63",
 x"00d65c63",
 x"0005a703",
@@ -60,7 +44,7 @@ x"00458593",
 x"00460613",
 x"fedff06f",
 x"80004717",
-x"f4870713",
+x"f8870713",
 x"80818793",
 x"00f75863",
 x"00072023",
@@ -89,26 +73,16 @@ x"ffe40413",
 x"34141073",
 x"34002473",
 x"30200073",
-x"fc010113",
-x"02912a23",
-x"800004b7",
-x"0004a223",
+x"800007b7",
+x"fec10113",
+x"0007a223",
 x"800007b7",
 x"0007a023",
 x"ffffd7b7",
-x"02112e23",
-x"02812c23",
-x"03212823",
-x"03312623",
-x"03412423",
-x"03512223",
-x"03612023",
-x"01712e23",
-x"01812c23",
-x"01912a23",
-x"01a12823",
-x"01b12623",
-x"a1c78793",
+x"00112823",
+x"00812623",
+x"00912423",
+x"9bc78793",
 x"30579073",
 x"e0802783",
 x"00d79713",
@@ -144,7 +118,7 @@ x"000016b7",
 x"60068693",
 x"00d76733",
 x"00e7a023",
-x"428000ef",
+x"460000ef",
 x"00050863",
 x"00100793",
 x"c0f02423",
@@ -157,17 +131,16 @@ x"ffff7637",
 x"00000793",
 x"5ff70713",
 x"a0060613",
-x"20d76463",
+x"1ed76c63",
 x"00000713",
 x"3fe00613",
-x"20f66463",
+x"1ef66c63",
 x"fff78793",
-x"000106b7",
 x"00679793",
-x"fc068693",
+x"01079793",
 x"00371713",
 x"01877713",
-x"00d7f7b3",
+x"0107d793",
 x"00e7e7b3",
 x"0017e793",
 x"fffff737",
@@ -187,85 +160,80 @@ x"30479073",
 x"00800793",
 x"3007a073",
 x"ffffd537",
-x"db850513",
-x"6b0000ef",
+x"d1c50513",
+x"6c4000ef",
 x"f1302573",
-x"634000ef",
+x"658000ef",
 x"ffffd537",
-x"df050513",
-x"69c000ef",
+x"d5450513",
+x"6b0000ef",
 x"e0002503",
-x"620000ef",
+x"644000ef",
 x"ffffd537",
-x"df850513",
-x"688000ef",
+x"d5c50513",
+x"69c000ef",
 x"30102573",
-x"60c000ef",
+x"630000ef",
 x"ffffd537",
-x"e0050513",
-x"674000ef",
+x"d6450513",
+x"688000ef",
 x"fc002573",
-x"5f8000ef",
+x"61c000ef",
 x"ffffd537",
-x"e0850513",
-x"660000ef",
+x"d6c50513",
+x"674000ef",
 x"e0802503",
 x"00100413",
-x"ffffd937",
-x"5dc000ef",
+x"ffffd4b7",
+x"600000ef",
 x"ffffd537",
-x"e1050513",
-x"644000ef",
+x"d7450513",
+x"658000ef",
 x"e0404503",
 x"00a41533",
 x"ffc57513",
-x"5c0000ef",
+x"5e4000ef",
 x"ffffd537",
-x"e1850513",
-x"628000ef",
+x"d7c50513",
+x"63c000ef",
 x"e0504783",
 x"00f41533",
 x"ffc57513",
-x"5a4000ef",
-x"db490513",
-x"610000ef",
+x"5c8000ef",
+x"d1848513",
+x"624000ef",
 x"e0802783",
 x"00f79713",
 x"06075063",
 x"ffffd537",
-x"e2050513",
-x"5f8000ef",
-x"2cc000ef",
-x"e0002783",
-x"fffffa37",
-x"500a0a13",
-x"00279413",
-x"00f40433",
+x"d8450513",
+x"60c000ef",
+x"308000ef",
+x"e0002703",
+x"00271413",
+x"00e40433",
 x"00141413",
-x"00a409b3",
-x"0089b433",
+x"00a407b3",
+x"0087b433",
 x"00b40433",
-x"e0802783",
-x"00e79713",
-x"0c075663",
-x"000a2783",
-x"00f79713",
-x"0c075063",
+x"e0802703",
+x"00e71693",
+x"0c06d463",
+x"fffff737",
+x"50072683",
+x"50070713",
+x"00f69613",
+x"0a065a63",
 x"ffffd537",
-x"004a2783",
-x"e4c50513",
-x"5a8000ef",
-x"ffffdb37",
-x"e58b0513",
-x"ffffd9b7",
-x"598000ef",
-x"ffffdab7",
-x"f7498993",
-x"ffffdc37",
-x"ffffdcb7",
+x"00472783",
+x"db050513",
+x"5bc000ef",
 x"ffffd7b7",
-x"ed878513",
-x"57c000ef",
+x"dbc78513",
+x"5b0000ef",
+x"ffffd537",
+x"e3c50513",
+x"5a4000ef",
 x"fffff7b7",
 x"50078793",
 x"0007a703",
@@ -274,142 +242,162 @@ x"fe06dce3",
 x"0047a403",
 x"0ff47413",
 x"00040513",
-x"4c8000ef",
-x"db490513",
-x"550000ef",
+x"500000ef",
+x"d1848513",
+x"578000ef",
 x"03f00793",
-x"20f40263",
+x"24f40a63",
 x"f9b40413",
 x"0ff47413",
 x"01300793",
-x"1e87e263",
+x"2287e863",
+x"ffffd7b7",
+x"ed878793",
 x"00241413",
-x"01340433",
+x"00f40433",
 x"00042783",
 x"00078067",
 x"00c686b3",
 x"00178793",
-x"df1ff06f",
+x"e01ff06f",
 x"ffe70693",
 x"ffd6f693",
 x"00069863",
 x"0037d793",
 x"00170713",
-x"de5ff06f",
+x"df5ff06f",
 x"0017d793",
 x"ff5ff06f",
-x"1d0000ef",
-x"f285e4e3",
+x"00f12023",
+x"214000ef",
+x"00012783",
+x"f285e2e3",
 x"00b41463",
-x"f33560e3",
+x"f0f56ee3",
 x"00100513",
-x"704000ef",
-x"db490513",
-x"4dc000ef",
+x"6e4000ef",
+x"d1848513",
+x"4f4000ef",
 x"00000513",
-x"049000ef",
+x"019000ef",
 x"ffffc2b7",
 x"00028067",
-x"e58b0513",
-x"4c4000ef",
-x"f3dff06f",
 x"00000513",
-x"6d8000ef",
-x"f31ff06f",
-x"0044a403",
+x"6c4000ef",
+x"f2dff06f",
+x"800007b7",
+x"0047a403",
 x"00041863",
 x"ffffd537",
-x"ee050513",
-x"fddff06f",
-x"efcc0513",
-x"498000ef",
+x"e4450513",
+x"f11ff06f",
+x"ffffd537",
+x"e6050513",
+x"4b4000ef",
 x"00040513",
-x"41c000ef",
-x"f04c8513",
-x"488000ef",
+x"448000ef",
+x"ffffd537",
+x"e6850513",
+x"4a0000ef",
 x"00400537",
-x"40c000ef",
+x"434000ef",
 x"ffffd537",
-x"f1c50513",
-x"474000ef",
+x"e8050513",
+x"48c000ef",
 x"fffff7b7",
 x"50078793",
 x"0007a703",
 x"00f71693",
 x"fe06dce3",
-x"0047aa03",
-x"0ffa7a13",
-x"000a0513",
-x"3c0000ef",
+x"0047a503",
+x"0ff57513",
+x"00a12023",
+x"3e8000ef",
+x"00012503",
 x"07900793",
-x"ecfa12e3",
-x"2cc000ef",
+x"eaf518e3",
+x"2f8000ef",
 x"00050663",
 x"00300513",
-x"490000ef",
+x"49c000ef",
 x"ffffd537",
-x"f2850513",
-x"42c000ef",
-x"01045b93",
-x"00400a37",
-x"00010db7",
-x"fff00d13",
-x"24c000ef",
-x"174000ef",
-x"0d800513",
-x"118000ef",
-x"000a0513",
-x"128000ef",
-x"0f4000ef",
-x"250000ef",
-x"00157513",
-x"fe051ce3",
-x"fffb8b93",
-x"01ba0a33",
-x"fdab98e3",
-x"00400db7",
-x"00000d13",
-x"00000a13",
-x"00cd8d93",
-x"000a0793",
+x"e8c50513",
+x"440000ef",
+x"01045793",
+x"00178793",
+x"00400737",
+x"00e12023",
+x"fff78793",
+x"fff00713",
+x"08e79063",
+x"00000793",
+x"00000713",
 x"0007a583",
-x"01ba0533",
-x"004a0a13",
-x"00bd0d33",
-x"29c000ef",
-x"fe8a64e3",
+x"00400537",
+x"00c50513",
+x"00b70733",
+x"00a78533",
+x"00e12223",
+x"00f12023",
+x"2f0000ef",
+x"00012783",
+x"00412703",
+x"00478793",
+x"fc87eae3",
 x"4788d5b7",
 x"afe58593",
 x"00400537",
-x"288000ef",
+x"00e12023",
+x"2cc000ef",
 x"00400537",
 x"00040593",
 x"00450513",
-x"278000ef",
+x"2bc000ef",
+x"00012703",
 x"00400537",
 x"00850513",
-x"41a005b3",
-x"268000ef",
+x"40e005b3",
+x"2a8000ef",
 x"ffffd537",
-x"d9c50513",
-x"ebdff06f",
+x"d0050513",
+x"df9ff06f",
+x"00f12223",
+x"1ec000ef",
+x"124000ef",
+x"0d800513",
+x"0c8000ef",
+x"00012503",
+x"0d8000ef",
+x"0a4000ef",
+x"00412783",
+x"00f12223",
+x"1e8000ef",
+x"00157513",
+x"00412783",
+x"fe0518e3",
+x"00012683",
+x"00010737",
+x"00e68733",
+x"f31ff06f",
 x"00100513",
-x"ec1ff06f",
-x"0044a783",
-x"e8079ce3",
-x"ffffd7b7",
-x"f3878513",
-x"ea1ff06f",
+x"e7dff06f",
+x"800007b7",
+x"0047a783",
+x"e4079ee3",
+x"ffffd537",
+x"e9c50513",
+x"d91ff06f",
 x"e0802783",
 x"2007f793",
-x"00079663",
-x"f48a8513",
-x"e8dff06f",
+x"00079863",
+x"ffffd537",
+x"eac50513",
+x"d79ff06f",
 x"00100513",
-x"e75ff06f",
-x"ffffd7b7",
-x"f5478513",
-x"e79ff06f",
+x"e35ff06f",
+x"ffffd537",
+x"eb850513",
+x"d65ff06f",
 x"e0802503",
 x"00f55513",
 x"00157513",
@@ -433,20 +421,20 @@ x"fe07cee3",
 x"80402503",
 x"0ff57513",
 x"00008067",
-x"ff010113",
-x"00812423",
+x"ff810113",
+x"00812023",
 x"00050413",
 x"01055513",
 x"0ff57513",
-x"00112623",
+x"00112223",
 x"fd1ff0ef",
 x"00845513",
 x"0ff57513",
 x"fc5ff0ef",
 x"0ff47513",
-x"00812403",
-x"00c12083",
-x"01010113",
+x"00012403",
+x"00412083",
+x"00810113",
 x"fb1ff06f",
 x"80002783",
 x"00c79713",
@@ -455,130 +443,124 @@ x"800007b7",
 x"00878793",
 x"80f02223",
 x"00008067",
-x"fd010113",
-x"03212023",
-x"fffff937",
-x"02912223",
-x"01312e23",
-x"01412c23",
-x"01512a23",
-x"02112623",
-x"02812423",
-x"00050993",
-x"00058a13",
+x"fe810113",
+x"00912623",
+x"00112a23",
+x"00812823",
+x"00050713",
 x"00000493",
-x"50090913",
-x"00400a93",
-x"04099a63",
-x"00092783",
-x"00f79713",
-x"fe075ce3",
-x"00492403",
+x"04071a63",
+x"fffff7b7",
+x"50078793",
+x"0007a683",
+x"00f69613",
+x"fe065ce3",
+x"0047a403",
 x"0ff47413",
-x"00c10793",
-x"009787b3",
-x"00878023",
+x"00448793",
+x"00810693",
+x"00d787b3",
+x"fe878e23",
 x"00148493",
-x"fd549ce3",
-x"02c12083",
-x"02812403",
-x"00c12503",
-x"02412483",
-x"02012903",
-x"01c12983",
-x"01812a03",
-x"01412a83",
-x"03010113",
+x"00400793",
+x"fcf494e3",
+x"01412083",
+x"01012403",
+x"00812503",
+x"00c12483",
+x"01810113",
 x"00008067",
-x"f59ff0ef",
+x"00b48433",
+x"00e12223",
+x"00b12023",
+x"f6dff0ef",
 x"00300513",
-x"009a0433",
-x"ef9ff0ef",
+x"f11ff0ef",
 x"00040513",
-x"f09ff0ef",
+x"f21ff0ef",
 x"00000513",
-x"ee9ff0ef",
+x"f01ff0ef",
 x"00050413",
-x"ec9ff0ef",
-x"f9dff06f",
-x"ff010113",
-x"00112623",
-x"f25ff0ef",
+x"ee1ff0ef",
+x"00412703",
+x"00012583",
+x"f95ff06f",
+x"ffc10113",
+x"00112023",
+x"f35ff0ef",
 x"00600513",
-x"ec9ff0ef",
-x"00c12083",
-x"01010113",
-x"ea5ff06f",
-x"fe010113",
-x"00112e23",
-x"f05ff0ef",
+x"ed9ff0ef",
+x"00012083",
+x"00410113",
+x"eb5ff06f",
+x"ff810113",
+x"00112223",
+x"f15ff0ef",
 x"00500513",
-x"ea9ff0ef",
+x"eb9ff0ef",
 x"00000513",
-x"ea1ff0ef",
-x"00a12623",
-x"e81ff0ef",
-x"01c12083",
-x"00c12503",
-x"02010113",
+x"eb1ff0ef",
+x"00a12023",
+x"e91ff0ef",
+x"00412083",
+x"00012503",
+x"00810113",
 x"00008067",
-x"ff010113",
-x"00112623",
-x"ed1ff0ef",
+x"ffc10113",
+x"00112023",
+x"ee1ff0ef",
 x"0ab00513",
-x"e75ff0ef",
-x"e59ff0ef",
+x"e85ff0ef",
+x"e69ff0ef",
 x"f95ff0ef",
 x"fb1ff0ef",
 x"00257793",
 x"fff00513",
 x"02078063",
-x"eadff0ef",
+x"ebdff0ef",
 x"00400513",
-x"e51ff0ef",
-x"e35ff0ef",
+x"e61ff0ef",
+x"e45ff0ef",
 x"f91ff0ef",
 x"01e51513",
 x"41f55513",
-x"00c12083",
-x"01010113",
+x"00012083",
+x"00410113",
 x"00008067",
-x"fd010113",
-x"02812423",
-x"02912223",
-x"01312e23",
-x"02112623",
-x"03212023",
-x"01412c23",
-x"00050493",
-x"00b12623",
-x"00000413",
-x"00400993",
-x"00c10793",
-x"008787b3",
-x"0007ca03",
+x"fe810113",
+x"00812823",
+x"00912623",
+x"00112a23",
+x"00050413",
+x"00b12423",
+x"00000493",
+x"00940733",
+x"00e12223",
+x"00448793",
+x"00810713",
+x"00e786b3",
+x"ffc6c783",
+x"00f12023",
 x"f21ff0ef",
-x"e49ff0ef",
+x"e59ff0ef",
 x"00200513",
-x"dedff0ef",
-x"00848933",
-x"00090513",
-x"df9ff0ef",
-x"000a0513",
-x"dd9ff0ef",
-x"dbdff0ef",
+x"dfdff0ef",
+x"00412703",
+x"00070513",
+x"e09ff0ef",
+x"00012503",
+x"de9ff0ef",
+x"dcdff0ef",
 x"f19ff0ef",
 x"00157513",
 x"fe051ce3",
-x"00140413",
-x"fb341ee3",
-x"02c12083",
-x"02812403",
-x"02412483",
-x"02012903",
-x"01c12983",
-x"01812a03",
-x"03010113",
+x"00148493",
+x"00400713",
+x"fae494e3",
+x"01412083",
+x"01012403",
+x"00c12483",
+x"01810113",
 x"00008067",
 x"fffff7b7",
 x"50078793",
@@ -587,103 +569,91 @@ x"00a71693",
 x"fe06cce3",
 x"00a7a223",
 x"00008067",
-x"fe010113",
-x"01212823",
-x"00050913",
+x"ff410113",
+x"00812223",
+x"00050413",
 x"03000513",
-x"00112e23",
-x"00812c23",
-x"00912a23",
-x"01312623",
-x"fc5ff0ef",
+x"00112423",
+x"00912023",
+x"fcdff0ef",
 x"07800513",
-x"ffffd4b7",
-x"fb9ff0ef",
-x"01c00413",
-x"fc448493",
-x"ffc00993",
-x"008957b3",
-x"00f7f793",
-x"00f487b3",
+x"fc5ff0ef",
+x"01c00493",
+x"00945733",
+x"ffffd7b7",
+x"00f77713",
+x"f2878793",
+x"00e787b3",
 x"0007c503",
-x"ffc40413",
-x"f95ff0ef",
-x"ff3414e3",
-x"01c12083",
-x"01812403",
-x"01412483",
-x"01012903",
-x"00c12983",
-x"02010113",
+x"ffc48493",
+x"fa1ff0ef",
+x"ffc00793",
+x"fcf49ee3",
+x"00812083",
+x"00412403",
+x"00012483",
+x"00c10113",
 x"00008067",
-x"ff010113",
-x"00812423",
-x"01212023",
-x"00112623",
-x"00912223",
+x"ff410113",
+x"00812223",
+x"00112423",
+x"00912023",
 x"00050413",
-x"00a00913",
 x"00044483",
 x"00140413",
-x"00049e63",
-x"00c12083",
-x"00812403",
-x"00412483",
-x"00012903",
-x"01010113",
+x"00049c63",
+x"00812083",
+x"00412403",
+x"00012483",
+x"00c10113",
 x"00008067",
-x"01249663",
+x"00a00793",
+x"00f49663",
 x"00d00513",
-x"f29ff0ef",
+x"f41ff0ef",
 x"00048513",
-x"f21ff0ef",
+x"f39ff0ef",
 x"fc9ff06f",
-x"ff010113",
-x"00812423",
+x"ff810113",
+x"00812023",
 x"00050413",
 x"ffffd537",
-x"d4450513",
-x"00112623",
-x"f91ff0ef",
+x"ca850513",
+x"00112223",
+x"f99ff0ef",
 x"00241793",
 x"ffffd537",
 x"008787b3",
-x"fd450513",
+x"f3850513",
 x"00f50533",
-x"f79ff0ef",
+x"f81ff0ef",
 x"00800793",
 x"3007b073",
-x"c35ff0ef",
+x"c65ff0ef",
 x"00050863",
 x"00100793",
 x"c0f02423",
 x"c0002623",
 x"10500073",
 x"ffdff06f",
-x"fb010113",
-x"04112623",
-x"04512423",
-x"04612223",
-x"04712023",
-x"02812e23",
-x"02912c23",
-x"02a12a23",
-x"02b12823",
-x"02c12623",
-x"02d12423",
-x"02e12223",
-x"02f12023",
-x"01012e23",
-x"01112c23",
-x"01c12a23",
-x"01d12823",
-x"01e12623",
-x"01f12423",
+x"fd010113",
+x"02112623",
+x"02512423",
+x"02612223",
+x"02712023",
+x"00812e23",
+x"00912c23",
+x"00a12a23",
+x"00b12823",
+x"00c12623",
+x"00d12423",
+x"00e12223",
+x"00f12023",
 x"342024f3",
 x"800007b7",
 x"00778793",
-x"0af49063",
-x"bbdff0ef",
+x"08f49463",
+x"c05ff0ef",
 x"00050863",
 x"c0802783",
 x"0017c793",
@@ -691,7 +661,7 @@ x"c0f02423",
 x"e0802783",
 x"00f79713",
 x"02075863",
-x"badff0ef",
+x"bf5ff0ef",
 x"e0002783",
 x"fffff737",
 x"fff00693",
@@ -702,25 +672,19 @@ x"40d72423",
 x"00b787b3",
 x"40f72623",
 x"40a72423",
-x"03c12403",
-x"04c12083",
-x"04812283",
-x"04412303",
-x"04012383",
-x"03812483",
-x"03412503",
-x"03012583",
-x"02c12603",
-x"02812683",
-x"02412703",
-x"02012783",
-x"01c12803",
-x"01812883",
-x"01412e03",
-x"01012e83",
-x"00c12f03",
-x"00812f83",
-x"05010113",
+x"01c12403",
+x"02c12083",
+x"02812283",
+x"02412303",
+x"02012383",
+x"01812483",
+x"01412503",
+x"01012583",
+x"00c12603",
+x"00812683",
+x"00412703",
+x"00012783",
+x"03010113",
 x"30200073",
 x"00700793",
 x"00f49c63",
@@ -728,132 +692,129 @@ x"800007b7",
 x"0007a783",
 x"00078663",
 x"00100513",
-x"e99ff0ef",
+x"ec9ff0ef",
 x"34102473",
 x"e0802783",
 x"00e79713",
 x"04075263",
 x"ffffd537",
-x"d4c50513",
-x"e25ff0ef",
+x"cb050513",
+x"e5dff0ef",
 x"00048513",
-x"da9ff0ef",
+x"df1ff0ef",
 x"02000513",
-x"d85ff0ef",
+x"dcdff0ef",
 x"00040513",
-x"d99ff0ef",
+x"de1ff0ef",
 x"02000513",
-x"d75ff0ef",
+x"dbdff0ef",
 x"34302573",
-x"d89ff0ef",
+x"dd1ff0ef",
 x"ffffd537",
-x"db450513",
-x"df1ff0ef",
+x"d1850513",
+x"e29ff0ef",
 x"00440413",
 x"34141073",
-x"f3dff06f",
-x"fd010113",
-x"01612823",
+x"f55ff06f",
+x"fe010113",
+x"00912a23",
 x"00100793",
-x"80000b37",
-x"02812423",
-x"02112623",
-x"02912223",
-x"03212023",
-x"01312e23",
-x"01412c23",
-x"01512a23",
-x"01712623",
-x"00fb2023",
-x"00050413",
+x"800004b7",
+x"00112e23",
+x"00812c23",
+x"00a12023",
+x"00f4a023",
 x"02051863",
 x"ffffd537",
-x"d5850513",
-x"d9dff0ef",
+x"cbc50513",
+x"dedff0ef",
+x"00012503",
 x"004005b7",
-x"00040513",
-x"b0dff0ef",
+x"b85ff0ef",
 x"4788d7b7",
 x"afe78793",
 x"04f50663",
 x"00000513",
 x"0340006f",
 x"ffffd537",
-x"d7850513",
-x"d71ff0ef",
+x"cdc50513",
+x"dc1ff0ef",
 x"00400537",
-x"cf5ff0ef",
+x"d55ff0ef",
 x"ffffd537",
-x"d9450513",
-x"d5dff0ef",
+x"cf850513",
+x"dadff0ef",
 x"e0802783",
 x"00d79713",
 x"00074663",
 x"00300513",
-x"da1ff0ef",
-x"bcdff0ef",
+x"de9ff0ef",
+x"c35ff0ef",
 x"fa0504e3",
 x"ff1ff06f",
+x"00012503",
 x"004005b7",
 x"00458593",
-x"00040513",
-x"aa9ff0ef",
+x"b21ff0ef",
+x"00050413",
+x"00012503",
 x"004005b7",
-x"00050993",
 x"00858593",
-x"00040513",
-x"a95ff0ef",
-x"00400ab7",
-x"00050a13",
-x"ffc9fb93",
-x"00000913",
-x"00000493",
-x"00ca8a93",
-x"015905b3",
-x"05791a63",
-x"014484b3",
+x"b0dff0ef",
+x"00050693",
+x"ffc47613",
+x"00000713",
+x"00000793",
+x"004005b7",
+x"00c58593",
+x"00b705b3",
+x"02c71e63",
+x"00d787b3",
 x"00200513",
-x"fa0492e3",
+x"fa0792e3",
 x"ffffd537",
-x"d9c50513",
-x"ce1ff0ef",
-x"02c12083",
-x"02812403",
+x"d0050513",
+x"d31ff0ef",
 x"800007b7",
-x"0137a223",
-x"000b2023",
-x"02412483",
-x"02012903",
-x"01c12983",
-x"01812a03",
-x"01412a83",
-x"01012b03",
-x"00c12b83",
-x"03010113",
+x"0087a223",
+x"01c12083",
+x"01812403",
+x"0004a023",
+x"01412483",
+x"02010113",
 x"00008067",
-x"00040513",
-x"a1dff0ef",
-x"00a92023",
-x"00a484b3",
-x"00490913",
-x"f95ff06f",
-x"ff010113",
-x"00112623",
-x"00812423",
+x"00012503",
+x"00c12823",
+x"00e12623",
+x"00d12423",
+x"00f12223",
+x"a9dff0ef",
+x"00c12703",
+x"00412783",
+x"01012603",
+x"00a72023",
+x"00812683",
+x"00a787b3",
+x"00470713",
+x"f85ff06f",
+x"ff810113",
+x"00112223",
+x"00812023",
 x"00800793",
 x"3007b073",
-x"00000413",
-x"00050463",
+x"00a03533",
+x"40a00533",
 x"e0400437",
+x"00a47433",
 x"ffffd537",
-x"da050513",
-x"c65ff0ef",
+x"d0450513",
+x"ca9ff0ef",
 x"00040513",
-x"be9ff0ef",
+x"c3dff0ef",
 x"ffffd537",
-x"db050513",
-x"c51ff0ef",
-x"915ff0ef",
+x"d1450513",
+x"c95ff0ef",
+x"981ff0ef",
 x"00050663",
 x"c0002423",
 x"c0002623",
@@ -899,8 +860,8 @@ x"6f6c746f",
 x"72656461",
 x"0a3e3e20",
 x"444c420a",
-x"4f203a56",
-x"33207463",
+x"44203a56",
+x"31206365",
 x"30322031",
 x"480a3432",
 x"203a5657",
@@ -1002,26 +963,26 @@ x"676e6974",
 x"6f656e2f",
 x"32337672",
 x"00000000",
-x"ffffc5f8",
-x"ffffc618",
-x"ffffc618",
-x"ffffc4a4",
-x"ffffc618",
-x"ffffc618",
-x"ffffc618",
-x"ffffc5f0",
-x"ffffc618",
-x"ffffc618",
-x"ffffc618",
-x"ffffc618",
-x"ffffc618",
-x"ffffc49c",
-x"ffffc4bc",
-x"ffffc618",
-x"ffffc4b0",
-x"ffffc618",
-x"ffffc618",
-x"ffffc60c",
+x"ffffc5c0",
+x"ffffc5e4",
+x"ffffc5e4",
+x"ffffc35c",
+x"ffffc5e4",
+x"ffffc5e4",
+x"ffffc5e4",
+x"ffffc5b8",
+x"ffffc5e4",
+x"ffffc5e4",
+x"ffffc5e4",
+x"ffffc5e4",
+x"ffffc5e4",
+x"ffffc42c",
+x"ffffc440",
+x"ffffc5e4",
+x"ffffc434",
+x"ffffc5e4",
+x"ffffc5e4",
+x"ffffc5d8",
 x"33323130",
 x"37363534",
 x"62613938",
diff --git a/rtl/core/neorv32_package.vhd b/rtl/core/neorv32_package.vhd
index c24a22a99..437ab2508 100644
--- a/rtl/core/neorv32_package.vhd
+++ b/rtl/core/neorv32_package.vhd
@@ -29,7 +29,7 @@ package neorv32_package is
 
   -- Architecture Constants -----------------------------------------------------------------
   -- -------------------------------------------------------------------------------------------
-  constant hw_version_c : std_ulogic_vector(31 downto 0) := x"01100700"; -- hardware version
+  constant hw_version_c : std_ulogic_vector(31 downto 0) := x"01100701"; -- hardware version
   constant archid_c     : natural := 19; -- official RISC-V architecture ID
   constant XLEN         : natural := 32; -- native data path width
 
diff --git a/sw/bootloader/bootloader.c b/sw/bootloader/bootloader.c
index cf31453b4..7dcde75eb 100644
--- a/sw/bootloader/bootloader.c
+++ b/sw/bootloader/bootloader.c
@@ -238,14 +238,6 @@ uint8_t spi_flash_read_status(void);
 void    spi_flash_write_addr(uint32_t addr);
 
 
-/**********************************************************************//**
- * Sanity check: Base RV32I ISA only!
- **************************************************************************/
-#if defined __riscv_atomic || defined __riscv_a || __riscv_b || __riscv_compressed || defined __riscv_c || defined __riscv_mul || defined __riscv_m
-  #warning In order to allow the bootloader to run on *any* CPU configuration it should be compiled using the base rv32i ISA only.
-#endif
-
-
 /**********************************************************************//**
  * Bootloader main.
  **************************************************************************/
diff --git a/sw/bootloader/makefile b/sw/bootloader/makefile
index bffcb9c76..1470ebbea 100644
--- a/sw/bootloader/makefile
+++ b/sw/bootloader/makefile
@@ -1,8 +1,8 @@
 # Bootloader (for BOOTROM) makefile.
 
-# Minimal RISC-V ISA only
-MARCH = rv32i_zicsr_zifencei
-MABI = ilp32
+# Minimal RISC-V ISA (E!) only
+MARCH = rv32e_zicsr_zifencei
+MABI = ilp32e
 
 # Optimize for minimal size
 EFFORT = -Os
@@ -14,7 +14,7 @@ EFFORT = -Os
 USER_FLAGS += \
 -Wl,--defsym,__neorv32_rom_size=4k \
 -Wl,--defsym,__neorv32_rom_base=0xFFFFC000 \
--Wl,--defsym,__neorv32_ram_size=512 \
+-Wl,--defsym,__neorv32_ram_size=256 \
 -DMAKE_BOOTLOADER \
 -flto