* total accessible RAM of 640K in a 6128 (64K Base RAM + 512K RAM expansion + 64K secondary RAM bank of the 6128)
* easy to assemble, all through-hole components
* 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
== currently in development ==
=== CPC iRAM/1088 ===
* for CPC 6128 only
* 1024K expansion
* total accessible RAM of 1088K in a 6128 (64K Base RAM + 1024K RAM expansion)
* easy to assemble, but SRAMs are in SMD packaging (SOP32) due to size constraints in the CPC 6128
* 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: Finished, will be released in late 2025
=== CPC iRAM/1024 ===
* for CPC 464/and 664
* offers two sockets for SRAMs
* upgrade to 576K (1 SRAM) or 640K/1024K (2 SRAMS)
* first SRAM: Upgrade to 576K, following the DK'Tronics standard without support of C3 mode (like many other RAM expansions)
* second SRAM: upgrade to 640K 1024K (128K 512K SRAM) or 1024K optionally also 640K (512K 128K SRAM)
* [http://norecess.cpcscene.net/advancedmemoryusage.html C3 RAM banking] supported if both SRAMs are fitted
* easy to assemble, all through-hole components
Status: in active developmentworking, currently testing, maybe needs another PCB revision
== paused = CPC iRAM/ abandoned 1024s ===
=== CPC * much smaller than iRAM/1088 ===1024, more similar in size to iRAM/640* for CPC 464 and 664* single 1MB SMD SRAM, upgrade to 1024K* [http://norecess.cpcscene.net/advancedmemoryusage.html C3 RAM banking] supported* easy to assemble, mostly through-hole components but one SMD SRAM
Status: prototype assembled, not tested yet == considered == === PLUS iRAM/1024 === * 1Mb upgrade for CPC 6128 onlyPlus series * 1024K expansion* total accessible RAM of 1088K in a 6128 less DIY friendly, probably needs more complex CPLDs (64K Base RAM + 1024K RAM expansionATF150x) Status: very early stage, still considering if it's feasible === GX iRAM/512 === * easy to assemble512K upgrade for GX4000* less DIY friendly, but some SMD components due to size constraints in the CPC 6128probably needs more complex CPLDs (ATF150x) Status: just an idea
Status: Prototype successfully tested. No final PCB yet. Might be resumed if there's demand.== abandoned ==
=== CPC iRAM/576 ===
* easy to assemble, all through-hole components
Status: currently on halt Abandoned as CPC iRAM/1024 will fit into all 464s and /664s and is more flexible
[[Category:Hardware]] [[Category:Memory expansions]]