CPC iRAM - Revision history

Eto: /* Compatibility */

2026-02-05T15:38:00Z

‎Compatibility

Eto at 15:35, 5 February 2026

2026-02-05T15:35:41Z

Eto: /* CPC 6128 - iRAM/1088 */

2026-01-06T12:58:07Z

‎CPC 6128 - iRAM/1088

Eto at 12:47, 6 January 2026

2026-01-06T12:47:47Z

Eto: /* released */

2026-01-06T12:28:08Z

‎released

Eto: /* Compatibility */

2026-01-06T12:25:51Z

‎Compatibility

Eto: /* Compatibility */

2026-01-06T12:24:53Z

‎Compatibility

Eto at 09:36, 6 January 2026

2026-01-06T09:36:28Z

Eto: /* CPC 464/664 - iRAM/1024 */

2026-01-06T09:28:23Z

‎CPC 464/664 - iRAM/1024

Eto at 09:01, 22 December 2025

2025-12-22T09:01:49Z

@@ Line 9: / Line 9: @@
 No incompatibilities have been reported so far for the 6128 version.
-The first revision of the 464 version has been found to be incompatible with the [[M4_Board|M4 Board]]. [https://github.com/etomuc/CPC464-iRAM1024?tab=readme-ov-file#modification-for-m4-incompatibility A patch has been published].
+The first revision of the 464 version has been found to be incompatible with the [[M4_Board|M4 Board]]. [https://github.com/etomuc/CPC464-iRAM1024/blob/main/README_rev1.md#modification-for-m4-incompatibility A patch has been published].
 The first 512K of expansion RAM follow the [[Standard_Memory_Expansions#Standard_128K-512K_Expansions_.28dk.27tronics.2Fdobbertin-style.29|DK'Tronics addressing mode standard]], giving up to 576K of RAM to legacy software. More modern software that supports the [[Standard_Memory_Expansions#Extended_1M-4M_Expansions_.28RAM7.2FYarek-style.29|extended 1M-4M standard]] will be able to access all the provided RAM.

@@ Line 9: / Line 9: @@
 No incompatibilities have been reported so far for the 6128 version.
-The first revision of the 464 version has been found to be incompatible with the [[M4_Board|M4 Board]]. [https://github.com/etomuc/CPC464-iRAM1024?tab=readme-ov-file#modification-for-m4-incompatibility A patch has been published] and is currently tested. Further revisions will include the patch once tests have been successful.
+The first revision of the 464 version has been found to be incompatible with the [[M4_Board|M4 Board]]. [https://github.com/etomuc/CPC464-iRAM1024?tab=readme-ov-file#modification-for-m4-incompatibility A patch has been published].
 The first 512K of expansion RAM follow the [[Standard_Memory_Expansions#Standard_128K-512K_Expansions_.28dk.27tronics.2Fdobbertin-style.29|DK'Tronics addressing mode standard]], giving up to 576K of RAM to legacy software. More modern software that supports the [[Standard_Memory_Expansions#Extended_1M-4M_Expansions_.28RAM7.2FYarek-style.29|extended 1M-4M standard]] will be able to access all the provided RAM.

@@ Line 40: / Line 40: @@
 <gallery>
-iRAM1088.jpg|iRAM/1088 for CPC 6128
+iRAM1088.jpg|iRAM/1088
 </gallery>

@@ Line 3: / Line 3: @@
 [[File:Iram1024.jpg|thumbnail|iRAM/1024 for the CPC 464/664]]
-CPC iRAM is a series of open source, DIY friendly, internal RAM expansions for the CPC 6128 and CPC 464/664 (later hopefully also for the Plus/GX4000).
+CPC iRAM is the first [[Standard_Memory_Expansions|standard]] compatible, internal plug & play RAM expansion series for the CPC range of computer and provides up to 1MB of expanded RAM. All variations are open source, DIY friendly and sit in the CPU socket with no further cabling and no additional soldering inside the CPC.
-−
-The iRAM expansion sits in the CPU socket and requires no additional soldering inside the CPC.
 == Compatibility ==
@@ Line 11: / Line 9: @@
 No incompatibilities have been reported so far for the 6128 version.
-The first revision of the 464 version has been found to be incompatible with the [[M4_Board|M4 Board]]. A patch has been published and is currently tested. Further revisions will include the patch once tests have been successful.
+The first revision of the 464 version has been found to be incompatible with the [[M4_Board|M4 Board]]. [https://github.com/etomuc/CPC464-iRAM1024?tab=readme-ov-file#modification-for-m4-incompatibility A patch has been published] and is currently tested. Further revisions will include the patch once tests have been successful.
 The first 512K of expansion RAM follow the [[Standard_Memory_Expansions#Standard_128K-512K_Expansions_.28dk.27tronics.2Fdobbertin-style.29|DK'Tronics addressing mode standard]], giving up to 576K of RAM to legacy software. More modern software that supports the [[Standard_Memory_Expansions#Extended_1M-4M_Expansions_.28RAM7.2FYarek-style.29|extended 1M-4M standard]] will be able to access all the provided RAM.
@@ Line 33: / Line 31: @@
 * perfectly fits into a CPC 6128, even with socketed ROM or RAM. In Schneider CPC 6128 the metal shielding needs to be removed or altered.
-Status: Released - see https://github.com/etomuc/CPC6128_iRAM-640
+Repository: https://github.com/etomuc/CPC6128_iRAM-640
-Note: Even smaller commercial alternative available by Lotharek.pl
+''Note: Meanwhile a commercial product is available at Lotharek.pl which also claims to offer 640K and is even smaller, not much larger than the CPU socket itself. However not much information can be found except for the shop.''
@@ Line 51: / Line 49: @@
 * perfectly fits into a CPC 6128, even with socketed ROM or RAM. In Schneider CPC 6128 the metal shielding needs to be removed or altered.
-Status: Released - see https://github.com/etomuc/CPC6128_iRAM-1088
+Repository: https://github.com/etomuc/CPC6128_iRAM-1088
 === CPC 464/664 - iRAM/1024 ===
@@ Line 65: / Line 63: @@
 * easy to assemble, all through-hole components
-Status: Released - see https://github.com/etomuc/CPC464-iRAM1024
+Repository: https://github.com/etomuc/CPC464-iRAM1024
-[[Category:Hardware]] [[Category:Memory expansions]]
+[[Category:Hardware]] [[Category:Memory expansions]] [[Category:DIY| ]]

@@ Line 17: / Line 17: @@
 External memory expansions will be ignored once the iRAM is installed. This can be useful for external feature-expansions that also provide a RAM expansion and usually cannot be used in parallel with other (external) RAM expansions. A great use case is to put the ULIFAC in ROM board mode which replaces the full or parts of the ULIFACs RAM with ROM slots. Now with the iRAM installed the CPC still has access to the full RAM provided by the iRAM. If needed a disable switch can optionally be connected to disable the internal iRAM from outside the CPC without removing the iRAM.
-== released ==
+== Available versions ==
 === CPC 6128 - iRAM/640 ===

@@ Line 57: / Line 57: @@
 * for CPC 464 and 664
-* offers two sockets for SRAMs
+* upgrade to 1024K including [http://norecess.cpcscene.net/advancedmemoryusage.html C3 RAM banking] support for 6128 compatibility
-* upgrade to 576K (1 SRAM) or 640K/1024K (2 SRAMS)
+* alternatively without C3 support 576K or 1088K (one or two SRAMs fitted)
-* first SRAM: Upgrade to 576K, following the DK'Tronics standard without support of C3 mode (like many other RAM expansions)
-* second SRAM: upgrade to 1024K (512K SRAM) or optionally also 640K (128K SRAM)
-* [http://norecess.cpcscene.net/advancedmemoryusage.html C3 RAM banking] supported if both SRAMs are fitted
 * easy to assemble, all through-hole components