Changes

* Uses a 8KB static RAM paged into memory at &c000-&dfff and repeats again at &e000-&ffff.* ROM is paged into the range &0000-&3fff when the red button is pressed and the (this causes an [[NMI vector is executed]]).* Black When the black button pages their is pressed the ROM is paged into the range &0000-&3fff and executes it at &0000. (this is a reset)This checks the BASIC ROM version, and clears the extra ram if a CPC6128 BASIC ROM from a CPC6128 is found.* Uses NMI* Only captures upper/lower ROM enabled state and nothing else. Doesn't capture the hardware state like the Multiface does. Code in the ROM reads the hardware state which it restores when resuming the program.* RAMDIS is asserted when ROM or RAM are active meaning no write through to ram behind. This also means that c000-ffff reads unmapped ram when ram is not actually enabled.* Menu code is at offset &3810 and is copied into RAM at &A200. * ram is disabled when the transtape returns to the program and can only be enabled using i/o port.* Uses port FBF0 (write only) FBF0 decoding is: 1111 1011 1111 00xx

0000 f3 di ;; disable maskable interruptsFBF0 output: 0001 0100df ld bc,0df00h ;; select upper rom bit 0is ram enable/disable state 0004 ed49 out (c),cbit 1 is rom enable/disable state 0006 01817f ld bc,7f81h ;; enable upper rom (mode 1 too)bit 2 is A10 on RAM 0009 ed49 out (c),cbit 3 is A11 on RAM 000b 31febf ld sp,0bffeh ;; setup stack which bit 4 is A12 on RAM bits 5-7 are not initialised after resetused.

000e 3a02c0 ld a,(0c002h) ;; * an opcode read BASIC ROM version numberof an address with the following bits: 0011 fe02 cp 02h ;; CPC6128?1xxx xxxx xxxx 0013 cc2e0c call z,0c2eh ;; erase extra RAMcauses the ram and rom to be disabled. (it jumps to 3800 in the ROM to restore the state)

;; this appears to set it up for a reset.* Uses port FBFF (input). 0016 210000 ld hl,0000h 0019 e5 push hl 001a e5 push hl 001b c30038 jp 3800h ;; I think the hardware monitors for address 3800h bit 7 is used to report lower rom and if found disables the ROMupper rom enabled state.

* Uses NMI* When Transtape ROM performs a write happens to their RAM it appears to write through to read of 3ffe (lower rom) and fffe (upper rom) and records the RAM behind??state of ROMEN. Decoding of FBFF is: 1111 1011 1111 11xx  * Menu code The same plastic case is at offset &3810 and is copied into RAM at &A200used by the Spectrum version of this interface. * Uses port FBF0 (output), FBFF (input)The spectrum version has two switches on the top. Don't know One of which chooses load/save. In the exact functions yetAmstrad these holes are filled with plastic caps.writing 0 Now, thanks to fbf0 disables it's internal romJose Leandro, the hardware specialist of the spectrum, with his famous page : http://trastero.speccy.org/cosas/JL/JL.htm We can know more about this hardware.

<gallery caption="Hard Micro's Transtape"> 

*[[Media:Transtape Manual.pdf|Transtape (Hard Micro) Manual]] (pdf) (spanish){{ES}} {{PDF}}

* [[Media:TRANSTAPETranstape-ROM.zip|Transtape Rom dump(ROM).zip]] (zipped rom fileTranstape ROM)* [[Media:Amstrad-Transtape (eagle).zip|Transtape (Eagle).zip]] (Transtape files for Eagle)

== Weblinks ==

* [http://cpcrulezwww.freecpc-power.com/index.php?page=detail&num=9321 ''Transtape'' from CPC-Power]* [http://cpcrulez.fr/ Some info can be found here (French)hardware-interface_debug-transtape_ASO.htm ''Transtape'' from CPCrulez]* [http://hardware.speccy.org/temp/Amstrad-transtape.html ''Transtape'' from hardware.speccy.org]

[[Category:Copy Protection]] [[Category:Peripherals]] [[Category:Manual]] [[Category:Stub]]