Tag: ula replacement

2 matching upgrades

Showing 2 products.

Status Product What it does Compatibility Links

Status	Product	What it does	Compatibility	Links
AvailableChecked Jul 27, 2026	SLAM128 Revised 2K24by Mark Smith, Zaxon, and Lotharek ula replacement cpld repair internal upgrade	A revised CPLD ULA replacement for the original ZX Spectrum 128K and grey Spectrum +2. The seller exposed a login-or-register-to-buy path on 2026-07-27 and explicitly limits this revision to the original 128K toastrack and grey +2. It does not support the black +2A or +2B. ULA removal and replacement is skilled board work; confirm socketing, orientation, current installation instructions, and motherboard condition before starting. Sources Lotharek SLAM128 Revised 2K24 page	Sinclair ZX Spectrum 128K Exact model Amstrad ZX Spectrum +2 Exact model	Buy SLAM128 Revised 2K24
PreorderChecked Jul 27, 2026	SuperULAby Lotharek ula replacement fpga memory rgb ulaplus turbosound saa1099 covox soundrive usb c internal upgrade soldering	Replaces the ULA, video RAM, upper RAM, and RF modulator in Issue 2 through 6 ZX Spectrum 48K boards while adding modern video, sound, memory, and machine modes. The seller listed availability after 2026-08-31 and exposed a preorder path on 2026-07-27. Installation is invasive: remove the ULA and RF modulator, disable or remove the original DRAM, connect M1, RESET, IORQ, and RFSH at the Z80, and install the supplied RGB adapter and ribbon cable. The output is digital RGB only, not composite or YUV. Verify board issue, pin 1, wiring, case clearance, display compatibility, and the current installation guide before work. Sources Lotharek SuperULA page Lotharek SuperULA announcement	Sinclair ZX Spectrum 48K Exact model Sinclair ZX Spectrum+ Exact model	Preorder SuperULA

AvailableChecked Jul 27, 2026

SLAM128 Revised 2K24by Mark Smith, Zaxon, and Lotharek

A revised CPLD ULA replacement for the original ZX Spectrum 128K and grey Spectrum +2.

The seller exposed a login-or-register-to-buy path on 2026-07-27 and explicitly limits this revision to the original 128K toastrack and grey +2. It does not support the black +2A or +2B. ULA removal and replacement is skilled board work; confirm socketing, orientation, current installation instructions, and motherboard condition before starting.

Sources

Lotharek SLAM128 Revised 2K24 page

Sinclair ZX Spectrum 128K Exact model
Amstrad ZX Spectrum +2 Exact model

Buy SLAM128 Revised 2K24

PreorderChecked Jul 27, 2026

SuperULAby Lotharek

Replaces the ULA, video RAM, upper RAM, and RF modulator in Issue 2 through 6 ZX Spectrum 48K boards while adding modern video, sound, memory, and machine modes.

The seller listed availability after 2026-08-31 and exposed a preorder path on 2026-07-27. Installation is invasive: remove the ULA and RF modulator, disable or remove the original DRAM, connect M1, RESET, IORQ, and RFSH at the Z80, and install the supplied RGB adapter and ribbon cable. The output is digital RGB only, not composite or YUV. Verify board issue, pin 1, wiring, case clearance, display compatibility, and the current installation guide before work.

Sources

Sinclair ZX Spectrum 48K Exact model
Sinclair ZX Spectrum+ Exact model

Preorder SuperULA