8bit Projects For Everyone


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Upgrade

Changes inside hardware are listed here. Most of them need technical experience, some are dedicated to technical advanced users.

For extra hardware that not requires much technical abilities, see Interfaces section.


Items in this section

4MB RAM (CPC)
 Internal upgrade to 4MB RAM (4160kB), compatibile to DK'Tronics 512kB, for CPC 464, 664, 6128. Can be used in FutureOS and SymbOS.
8251 (Spectrum)
 8251 serial interface.
AY (Spectrum)
 AY chip mounted inside ZX Spectrum or Timex Computer 2048.
Dock (Spectrum)
 The 64kB memory bank known from Timex computers. Timex memory map.
Eniac'owe (Spectrum)
 Upgrade to 80kB and CP/M compatibility by Wojciech Apel, 1985.
Flash ROM (CPC)
 Internal and external 4MB ROM (Flash EEPROM) upgrade for Amstrad CPC.
FlashD0 (Spectrum)
 128KB or 512KB PEROM (or Flash EPROM) for Spectrum compatibile computers. Can support 4MB RAM upgrade and be base for ZXVGS installation.
Gama 192 (Spectrum)
 New board for Didaktik Game with 192kB RAM
Keyboard (Spectrum)
 The original ZX Spectrum keyboard membrane life was several years. So replacements were developed.
MSX-2 SVI738 (MSX)
 Spectravideo 738 X'Press upgraded to MSX-2 compatibility.
Mapper 4MB (MSX)
 4MB RAM for MSX with memory mapper.
Memory (Timex)
 Internal memory upgrade for Timex Sinclair 2068, Timex Computer 2068 and Unipolbrit Komputer 2086. 128kB ROM, extra 512kB RAM.
Memory (ZX81)
 ZX81 memory upgrade. Can be used as SRAM for any Z80 CPU system.
Portfix (Sam Coupé)
 Allows to disable internal ports by external interface.
ROM replacer (Spectrum)
 Alternative ROMs for ZX Spectrum.
SAM512 (Sam Coupé)
 Internal memory upgrade to 512kB RAM. Part of Sams were sold with 256kB RAM only, but some software requires 512kB.
SamRam (Spectrum)
 Extra 32kB SRAM under ZXROM and support to two 32kB upper banks in ZX Spectrum 80kB.
TC2144 (Spectrum)
 Upgrade to 144kB RAM with compatibility to ZX Spectrum 128K.
TI-of-TTL (Timex FDD)
 Interface compatibile to Timex Interface M-397 and upgradeable to 128kB ROM, 8kB RAM and ZXVGS. Project from years 1997-2000, upgraded in 2004 and 2005 - Jarek Adamski.
To +3 (Spectrum)
 Disk interface for +2A/+2B that makes them compatibile to +3.
To 128 (CPC)
 The CPC 464 and 664 can be upgraded to 128kB RAM and CPC 6128 compatibility.
To 128K (Spectrum)
 Upgrade ZX Spectrum 48K to ZX Spectrum 128K compatibility. Also solutions for Timex Computer 2048.
Wonder RAM (Spectrum)
 Simple ZX Spectrum memory upgrade to partial ZX128 compatibility.
YABUS.TF (Timex FDD)
 Two YABUS slots for Timex FDD 3000 with memory extension (4MB RAM).
YABUS.TF3 (Timex FDD)
 4MB RAM extension for Timex FDD 3 with YABUS support.
YABUS.Z80RTC (Sam Coupé)
 Internal YABUS slot mounted in Z80CPU socket, includes also RTC. Mostly dedicated for Sam Coupé, but can be used in other machines.
Z80JOY (Sam Coupé)
 Internal Kempston Joystick interface, mounted under Z80 CPU (or over).
Z80JOY (Spectrum)
 Internal Kempston Joystick interface, mounted under Z80 CPU (or over).
ZX 4MB (Spectrum)
 ZX Spectrum memory upgrade - 4MB RAM (DRAM).
ZXMUX (Spectrum)
 AMSTRAD 40058, PCF1306P, ZX8401 multiplexer replacer. Used in ZX Spectrum ISSUE 5, 6A, 128K, +2 and Sinclair QL.

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CPC
4MB RAM
Flash ROM
To 128
Sam Coupé
SAM512
Portfix
YABUS.Z80RTC
Z80JOY
MSX
Mapper 4MB
MSX-2 SVI738
Spectrum
FlashD0
8251
AY
Eniac'owe
Dock
Gama 192
Keyboard
ROM replacer
SamRam
TC2144
To 128K
To +3
Wonder RAM
Z80JOY
ZX 4MB
ZXMUX
Timex
Memory
Timex FDD
YABUS.TF
YABUS.TF3
TI-of-TTL
ZX81
Memory

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© 2009-12-28 21:50 Jarek Adamski, http://8bit.yarek.pl