Memotech Limited MTX 500 User's Guide

REMEMORIZER User’s Guide

10 The paged memory map structure of the MTX computers was designed to operate in two modes :- 1. ROM Based (RELCPM = 0) ROMs are mapped from 0 to 3F

11 Default MTX RAM Based Memory Map, RELCPM = 1 0x0000..0x3fff 0x4000..0x7fff 0x8000..0xbfff 0xc000..0xffff P3,P2,P1,P0 512 512 500 / 51

12 REMEMORIZER MEMORY MAP MODIFICATIONS In these pictures, ROMs are shown with their names and are 8KB in size and RAM pages are assigned letters an

13 MTX+REMEMOrizer logical memory map, as seen in RELCPMH=1 mode :- 0x0000..0x3fff 0x4000..0x7fff 0x8000..0xbfff 0xc000..0xffff P3,P2,P1,P0 δ

14 CASSETTE TAPE By default REMEMOrizer does not load from or save to cassette tape. Almost all of the Memotech library on cassette has been convert

15 80 COLUMN CARD REMEMOrizer implements a video card which is largely compatible with the original FDX 80 column card. It outputs in 8 colours to

16 SOFTWARE REMEMOrizer includes following software :-  OS ROM  BASIC ROM  CP/M Boot ROM  SDX BASIC ROM  Tape Support  CP/M Utilities 

17 CP/M BOOT ROM The CP/M boot ROM sits in ROM page 4. REMEMOrizer provides this ROM unless you press SW1. So to bypass booting to CP/M, press this

18 SDX BASIC ROM The SDX BASIC ROM sits in ROM page 5. The SDX ROM in a real SDX provides USER commands to MTX BASIC, allowing the user to read and

19 3. INSTALLATION AND SETUP REMEMORIZER CONTENTS If your REMEMOrizer was supplied by the designer, your REMEMOrizer should have been supplied with

2

20 PREPARATION DECIDING ON WHETHER TO USE THE REPLACEMENT ROMS Replacement of the existing ROMs is optional, however, the memory test routine in the

21 MTX500 JUMPER Earlier MTX500s had a memory decoder PAL which made pages of the 32KB of memory appear in more than one place in the memory map. You

22 RS232 The RS232 card provides two functions. It provides RS232 ports, and it acts as a bridge to an FDX box (even if you don't have one conne

23 4. OPERATION POWER-ON The default behaviour of REMEMOrizer is to boot up in CP/M mode, however, upon power on, the FPGA on the GODIL on the REMEMO

24 The first image has various games in .COM format. There are also a few games in .RUN file format, most of which can be run using the RUN.COM progr

25 # dd if=/dev/sde of=partition1.dat bs=8M skip=1 count=1 # dd if=/dev/sde of=partition2.dat bs=8M skip=2 count=1 # ^D $ cpmls -f memotech-type18 p

26 ACCESSING SD CARDS ON WINDOWS If you must use Windows, then these ports of dd and cpmtools are useful. I put dd.exe in a directory on the PATH, a

27 Overwrite \cpmtools\diskdefs? (Yes/No/All): Y 1 file(s) copied. Warning: Don't be tempted to edit the diskdefs file. The cpmtools pa

28 TAPE OPERATION TAPE MODE SELECTION REMEMOrizer allows the user to switch between the Virtual Tape mode and Physical Tape mode using SW2 on the GO

29 5. CP/M UTILITIES RECONFIG.COM RECONFIG.COM is a version of CONFIG.COM, but enhanced for REMEMOTECH and REMEMOrizer. It gives give better error m

3 By Andrew Key User’s Guide REMEMOrizer Version 1.0.0 (16/01/2013) Document Revision 1.2

30 REZTAPE.COM REZTAPE.COM is a program for managing the virtual cassette tapes feature in REMEMOrizer. It is much like the RETAPE.COM program used t

31 For example, prior to switching to MTX BASIC :- A>REZTAPE QUAZZIA.MTX 0 A>REZTAPE SNAPPO.MTX 1 A>MTXL Then the usual MTX BASIC LOAD comma

32 6. INCOMPATIBILITIES There are a small number of incompatibilities between REMEMOrizer and real Memotech hardware.  CP/M programs which direct

33 INDEX 24 line ... 28 48 line ...

4 Credits Relating to the construction of REMEMOrizer, in no particular order... Geoff Boyd, for designing the Memotech hardware, and making it ava

5 TABLE OF CONTENTS 1. Introduction ...

6 SD Card...

7 1. INTRODUCTION REMEMOrizer is an add-on for the Memotech MTX series of home computers which were produced in the UK between 1983 and 1985. The ra

8 2. DESIGN OVERVIEW This section provides an overview of the REMEMOrizer design and functionality. As a User Guide, this document is not intended t

9 MEMORY REMEMOrizer provides :-  replacement for the 8KB OS ROM  replacement for the 8KB BASIC ROM  8KB CP/M boot ROM  8KB SDX BASIC RO