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MDSI GENIUS DISPLAY
MDSI Genius Display. The MDSI Genius (or 'TheGenius', 'Genius VHR') display system is one of those things that seems to have left only the vaguest footprints in computing history: a full-page A4 display for IBM-compatible PCs, from the days when a top-end system had a 286 andEGA.
MONOCHROME DISPLAY ADAPTER NOTES Register I/O 03B0h, 03B2h, 03B4h, 03B6h: CRTC address register. Write a CRTC register number (0 to 11h) to this port to select the CRTC register that will appear at port 03B5h.THE TOSHIBA T1000
The Toshiba T1000. The T1000 is an XT-class laptop from 1987. Its specification and form factor are similar to the IBM Convertible.What makes the T1000 unusual is that it includes a CP/M INFORMATION ARCHIVE : DISC FORMATS CP/M 2.2 disc formats. CP/M 2.2 works with a much larger range of discs than CP/M 1.4. The disc statistics are stored in a parameter block (the DPB), which contains the following information: CP/M INFORMATION ARCHIVE : BIOS CP/M Basic Input/Output System. The BIOS is the machine-dependent part of CP/M. In theory, all you need to do is change the BIOS and CP/M will work on a different machine. CP/M INFORMATION ARCHIVE : DISC FORMATS CP/M disc formats. The disc format used is to some extent implementation dependent. CP/M has no standard system (like the DOS boot record) to store disc parameters on the disc. SOFTWARE FOR AMSTRAD CP/M Amstrad PCW, CPC and +3. Remember to set your viewer to download to disc before attempting to follow these links (with lynx, use the d key to download them).Unless otherwise stated, these programs will not work under CP/M on the PCW16. CP/M INFORMATION ARCHIVE : DISCKIT DEVELOPMENT DISCKIT Development. DISCKIT is the diskette format/copy/verify utility supplied with Amstrad CP/M. This page is an attempt to chart its development history. CP/M INFORMATION ARCHIVE : BDOS SYSTEM CALLS BDOS system calls. So far, this list covers CP/M 1, 2 and 3, with partial MP/M and DOSPLUS details. Some groupings I use are: CP/M 1.3 The 1975 version of CP/M available as FILES FOR THE SPECTRUM +3 AND 128 Files for the Spectrum +3 and 128. There aren't the only programs I've written for the Spectrum; I'm gradually checking the archives and updating them where necessary, before adding them to this page.MDSI GENIUS DISPLAY
MDSI Genius Display. The MDSI Genius (or 'TheGenius', 'Genius VHR') display system is one of those things that seems to have left only the vaguest footprints in computing history: a full-page A4 display for IBM-compatible PCs, from the days when a top-end system had a 286 andEGA.
MONOCHROME DISPLAY ADAPTER NOTES Register I/O 03B0h, 03B2h, 03B4h, 03B6h: CRTC address register. Write a CRTC register number (0 to 11h) to this port to select the CRTC register that will appear at port 03B5h.THE TOSHIBA T1000
The Toshiba T1000. The T1000 is an XT-class laptop from 1987. Its specification and form factor are similar to the IBM Convertible.What makes the T1000 unusual is that it includes a CP/M INFORMATION ARCHIVE : DISC FORMATS CP/M disc formats. The disc format used is to some extent implementation dependent. CP/M has no standard system (like the DOS boot record) to store disc parameters on the disc.CP/M MAIN PAGE
Information Articles. A mini-howto explaining how to get DOS Plus 1.2 (CP/M-86 v4.1) running on your PC.; Why CP/M? Dave Baldwin's USENET posting explaining his reasons for still using CP/M. A description of the Amstrad PCW16, based on seeing it demonstrated at the Crawley PCW Club.; Building CP/M 3, thoughts on cross-compiling CP/M under DOS; How to read CP/M discs on a PC HOW TO READ CP/M DISCS How to read CP/M discs. One of the questions I've been asked most frequently since creating this site is: I've got these old discs from a Kaypro/PCW/Microbee CP/M INFORMATION ARCHIVE : DISC FORMATS CP/M 4.1 disc formats. CP/M 4.1 (DOS Plus) allows the use of two filesystems - CP/M and DOS.The version I have seen (supplied with the Amstrad PC1512) cannot handle larger floppies than 360k (CP/M) / 1.2Mb (DOS), or larger hard drive partitions than 32Mb.THE TOSHIBA T1000
The Toshiba T1000. The T1000 is an XT-class laptop from 1987. Its specification and form factor are similar to the IBM Convertible.What makes the T1000 unusual is that it includes aMDSI GENIUS DISPLAY
MDSI Genius Display. The MDSI Genius (or 'TheGenius', 'Genius VHR') display system is one of those things that seems to have left only the vaguest footprints in computing history: a full-page A4 display for IBM-compatible PCs, from the days when a top-end system had a 286 andEGA.
VINTAGE PC PAGES: MULTIPLE FLOPPIES More Than Two Floppy Drives. While it is possible to get more than two floppy drives onto PCs, it's not always easy. This document discusses why, and describes various pitfalls you may encounter. IBM 1391406 KEYBOARD The IBM 1391406 Keyboard. Note: You need a browser capable of displaying SVG images to see the keyboard layouts. The IBM 1391406 is the 102-key 'extended' keyboard HARDWARE - SEASIP.INFO F6h (output) sets the vertical origin of the screen. The value written to it specifies whichline ofthe Roller-RAM correspondsto the top lineof the screen. So OUT 0F6h, 8 means that the video controller will display pixel line 8 at the top of theCOMPAQ PORTABLE III
Keyboard. The keyboard controller (part number 106436-001) is probably the same one used in the Portable II. It supports all the functions of IBM's AT keyboard controller, plus a few of its own, mainly to set theprocessor speed.
CP/M INFORMATION ARCHIVE : DISC FORMATS CP/M disc formats. The disc format used is to some extent implementation dependent. CP/M has no standard system (like the DOS boot record) to store disc parameters on the disc. CP/M INFORMATION ARCHIVE : DISC FORMATS CP/M 2.2 disc formats. CP/M 2.2 works with a much larger range of discs than CP/M 1.4. The disc statistics are stored in a parameter block (the DPB), which contains the following information: CP/M INFORMATION ARCHIVE : BIOS CP/M Basic Input/Output System. The BIOS is the machine-dependent part of CP/M. In theory, all you need to do is change the BIOS and CP/M will work on a different machine. CP/M INFORMATION ARCHIVE : DISC FORMATS CP/M 4.1 disc formats. CP/M 4.1 (DOS Plus) allows the use of two filesystems - CP/M and DOS.The version I have seen (supplied with the Amstrad PC1512) cannot handle larger floppies than 360k (CP/M) / 1.2Mb (DOS), or larger hard drive partitions than 32Mb. CP/M INFORMATION ARCHIVE : DISCKIT DEVELOPMENT DISCKIT Development. DISCKIT is the diskette format/copy/verify utility supplied with Amstrad CP/M. This page is an attempt to chart its development history. VINTAGE PC PAGES: MULTIPLE FLOPPIES More Than Two Floppy Drives. While it is possible to get more than two floppy drives onto PCs, it's not always easy. This document discusses why, and describes various pitfalls you may encounter. KEY TRONIC KB 3270 PLUS KEYBOARD Command Description; ED xx: Set LEDs. EE: Diagnostic echo. F0 xx: Get/set scancode set. F0 00 (get scancode set) can return the following values: Code Translated Meaning 01 43 ENH101 mode, set 1 02 41 ENH101 mode, set 2 03 3F ENH101 mode, set 3 04 3D Native mode, set 1 05 3B Native mode, set 2 06 3C IRMA mode, set 1 07 58 IRMA mode, set 2 08 64 Undefined mode, set 2 09 44 Undefined mode, set 1LIBDSK HOMEPAGE
LIBDSK page. LIBDSK is a library for accessing discs and disc image files. It is intended for use in: Emulator tools - converting between real floppy discs and disc images, as CPCTRANS / PCWTRANS do under DOS. Filesystem utilities - CPMTOOLS is configurable to use LIBDSK, thus allowing the use of CPMTOOLS on emulator .DSK images. COLOUR GRAPHICS ADAPTER: NOTES Colour Graphics Adapter: Notes. This document describes the behaviour of IBM's original CGA, and some clones. The CGA is a colour card. According to the IBM technical manual, it can display on one of: IBM 1391406 KEYBOARD The IBM 1391406 Keyboard. Note: You need a browser capable of displaying SVG images to see the keyboard layouts. The IBM 1391406 is the 102-key 'extended' keyboard CP/M INFORMATION ARCHIVE : DISC FORMATS CP/M disc formats. The disc format used is to some extent implementation dependent. CP/M has no standard system (like the DOS boot record) to store disc parameters on the disc. CP/M INFORMATION ARCHIVE : DISC FORMATS CP/M 2.2 disc formats. CP/M 2.2 works with a much larger range of discs than CP/M 1.4. The disc statistics are stored in a parameter block (the DPB), which contains the following information: CP/M INFORMATION ARCHIVE : BIOS CP/M Basic Input/Output System. The BIOS is the machine-dependent part of CP/M. In theory, all you need to do is change the BIOS and CP/M will work on a different machine. CP/M INFORMATION ARCHIVE : DISC FORMATS CP/M 4.1 disc formats. CP/M 4.1 (DOS Plus) allows the use of two filesystems - CP/M and DOS.The version I have seen (supplied with the Amstrad PC1512) cannot handle larger floppies than 360k (CP/M) / 1.2Mb (DOS), or larger hard drive partitions than 32Mb. CP/M INFORMATION ARCHIVE : DISCKIT DEVELOPMENT DISCKIT Development. DISCKIT is the diskette format/copy/verify utility supplied with Amstrad CP/M. This page is an attempt to chart its development history. VINTAGE PC PAGES: MULTIPLE FLOPPIES More Than Two Floppy Drives. While it is possible to get more than two floppy drives onto PCs, it's not always easy. This document discusses why, and describes various pitfalls you may encounter. KEY TRONIC KB 3270 PLUS KEYBOARD Command Description; ED xx: Set LEDs. EE: Diagnostic echo. F0 xx: Get/set scancode set. F0 00 (get scancode set) can return the following values: Code Translated Meaning 01 43 ENH101 mode, set 1 02 41 ENH101 mode, set 2 03 3F ENH101 mode, set 3 04 3D Native mode, set 1 05 3B Native mode, set 2 06 3C IRMA mode, set 1 07 58 IRMA mode, set 2 08 64 Undefined mode, set 2 09 44 Undefined mode, set 1LIBDSK HOMEPAGE
LIBDSK page. LIBDSK is a library for accessing discs and disc image files. It is intended for use in: Emulator tools - converting between real floppy discs and disc images, as CPCTRANS / PCWTRANS do under DOS. Filesystem utilities - CPMTOOLS is configurable to use LIBDSK, thus allowing the use of CPMTOOLS on emulator .DSK images. COLOUR GRAPHICS ADAPTER: NOTES Colour Graphics Adapter: Notes. This document describes the behaviour of IBM's original CGA, and some clones. The CGA is a colour card. According to the IBM technical manual, it can display on one of: IBM 1391406 KEYBOARD The IBM 1391406 Keyboard. Note: You need a browser capable of displaying SVG images to see the keyboard layouts. The IBM 1391406 is the 102-key 'extended' keyboardCP/M MAIN PAGE
Information Articles. A mini-howto explaining how to get DOS Plus 1.2 (CP/M-86 v4.1) running on your PC.; Why CP/M? Dave Baldwin's USENET posting explaining his reasons for still using CP/M. A description of the Amstrad PCW16, based on seeing it demonstrated at the Crawley PCW Club.; Building CP/M 3, thoughts on cross-compiling CP/M under DOS; How to read CP/M discs on a PC CP/M INFORMATION ARCHIVE : BIOS CP/M Basic Input/Output System. The BIOS is the machine-dependent part of CP/M. In theory, all you need to do is change the BIOS and CP/M will work on a different machine. CP/M INFORMATION ARCHIVE : DISC FORMATS CP/M 4.1 disc formats. CP/M 4.1 (DOS Plus) allows the use of two filesystems - CP/M and DOS.The version I have seen (supplied with the Amstrad PC1512) cannot handle larger floppies than 360k (CP/M) / 1.2Mb (DOS), or larger hard drive partitions than 32Mb. VINTAGE PC PAGES: MULTIPLE FLOPPIES More Than Two Floppy Drives. While it is possible to get more than two floppy drives onto PCs, it's not always easy. This document discusses why, and describes various pitfalls you may encounter.THE TOSHIBA T1000
The Toshiba T1000. The T1000 is an XT-class laptop from 1987. Its specification and form factor are similar to the IBM Convertible.What makes the T1000 unusual is that it includes a MONOCHROME DISPLAY ADAPTER NOTES Register I/O 03B0h, 03B2h, 03B4h, 03B6h: CRTC address register. Write a CRTC register number (0 to 11h) to this port to select the CRTC register that will appear at port 03B5h. AMSTRAD PC TECHNICAL REFERENCE MANUAL SECTION 1 - HARDWARE 1.0 Introduction. This manual provides a comprehensive description of the AMSTRAD PC1512 hardware and firmware. General information about the PC1512, GEM Desktop and the delivered operating system software is contained in the AMSTRAD PC USER MANUAL. IBM 1391406 KEYBOARD The IBM 1391406 Keyboard. Note: You need a browser capable of displaying SVG images to see the keyboard layouts. The IBM 1391406 is the 102-key 'extended' keyboard HARDWARE - SEASIP.INFO F6h (output) sets the vertical origin of the screen. The value written to it specifies whichline ofthe Roller-RAM correspondsto the top lineof the screen. So OUT 0F6h, 8 means that the video controller will display pixel line 8 at the top of theCOMPAQ PORTABLE III
Keyboard. The keyboard controller (part number 106436-001) is probably the same one used in the Portable II. It supports all the functions of IBM's AT keyboard controller, plus a few of its own, mainly to set theprocessor speed.
CP/M INFORMATION ARCHIVE : DISC FORMATS CP/M disc formats. The disc format used is to some extent implementation dependent. CP/M has no standard system (like the DOS boot record) to store disc parameters on the disc. CP/M INFORMATION ARCHIVE : DISC FORMATS CP/M 2.2 disc formats. CP/M 2.2 works with a much larger range of discs than CP/M 1.4. The disc statistics are stored in a parameter block (the DPB), which contains the following information: CP/M INFORMATION ARCHIVE : BIOS CP/M Basic Input/Output System. The BIOS is the machine-dependent part of CP/M. In theory, all you need to do is change the BIOS and CP/M will work on a different machine. CP/M INFORMATION ARCHIVE : DISC FORMATS CP/M 4.1 disc formats. CP/M 4.1 (DOS Plus) allows the use of two filesystems - CP/M and DOS.The version I have seen (supplied with the Amstrad PC1512) cannot handle larger floppies than 360k (CP/M) / 1.2Mb (DOS), or larger hard drive partitions than 32Mb. CP/M INFORMATION ARCHIVE : DISCKIT DEVELOPMENT DISCKIT Development. DISCKIT is the diskette format/copy/verify utility supplied with Amstrad CP/M. This page is an attempt to chart its development history. VINTAGE PC PAGES: MULTIPLE FLOPPIES More Than Two Floppy Drives. While it is possible to get more than two floppy drives onto PCs, it's not always easy. This document discusses why, and describes various pitfalls you may encounter. KEY TRONIC KB 3270 PLUS KEYBOARD Command Description; ED xx: Set LEDs. EE: Diagnostic echo. F0 xx: Get/set scancode set. F0 00 (get scancode set) can return the following values: Code Translated Meaning 01 43 ENH101 mode, set 1 02 41 ENH101 mode, set 2 03 3F ENH101 mode, set 3 04 3D Native mode, set 1 05 3B Native mode, set 2 06 3C IRMA mode, set 1 07 58 IRMA mode, set 2 08 64 Undefined mode, set 2 09 44 Undefined mode, set 1LIBDSK HOMEPAGE
LIBDSK page. LIBDSK is a library for accessing discs and disc image files. It is intended for use in: Emulator tools - converting between real floppy discs and disc images, as CPCTRANS / PCWTRANS do under DOS. Filesystem utilities - CPMTOOLS is configurable to use LIBDSK, thus allowing the use of CPMTOOLS on emulator .DSK images. COLOUR GRAPHICS ADAPTER: NOTES Colour Graphics Adapter: Notes. This document describes the behaviour of IBM's original CGA, and some clones. The CGA is a colour card. According to the IBM technical manual, it can display on one of: IBM 1391406 KEYBOARD The IBM 1391406 Keyboard. Note: You need a browser capable of displaying SVG images to see the keyboard layouts. The IBM 1391406 is the 102-key 'extended' keyboard CP/M INFORMATION ARCHIVE : DISC FORMATS CP/M disc formats. The disc format used is to some extent implementation dependent. CP/M has no standard system (like the DOS boot record) to store disc parameters on the disc. CP/M INFORMATION ARCHIVE : DISC FORMATS CP/M 2.2 disc formats. CP/M 2.2 works with a much larger range of discs than CP/M 1.4. The disc statistics are stored in a parameter block (the DPB), which contains the following information: CP/M INFORMATION ARCHIVE : BIOS CP/M Basic Input/Output System. The BIOS is the machine-dependent part of CP/M. In theory, all you need to do is change the BIOS and CP/M will work on a different machine. CP/M INFORMATION ARCHIVE : DISC FORMATS CP/M 4.1 disc formats. CP/M 4.1 (DOS Plus) allows the use of two filesystems - CP/M and DOS.The version I have seen (supplied with the Amstrad PC1512) cannot handle larger floppies than 360k (CP/M) / 1.2Mb (DOS), or larger hard drive partitions than 32Mb. CP/M INFORMATION ARCHIVE : DISCKIT DEVELOPMENT DISCKIT Development. DISCKIT is the diskette format/copy/verify utility supplied with Amstrad CP/M. This page is an attempt to chart its development history. VINTAGE PC PAGES: MULTIPLE FLOPPIES More Than Two Floppy Drives. While it is possible to get more than two floppy drives onto PCs, it's not always easy. This document discusses why, and describes various pitfalls you may encounter. KEY TRONIC KB 3270 PLUS KEYBOARD Command Description; ED xx: Set LEDs. EE: Diagnostic echo. F0 xx: Get/set scancode set. F0 00 (get scancode set) can return the following values: Code Translated Meaning 01 43 ENH101 mode, set 1 02 41 ENH101 mode, set 2 03 3F ENH101 mode, set 3 04 3D Native mode, set 1 05 3B Native mode, set 2 06 3C IRMA mode, set 1 07 58 IRMA mode, set 2 08 64 Undefined mode, set 2 09 44 Undefined mode, set 1LIBDSK HOMEPAGE
LIBDSK page. LIBDSK is a library for accessing discs and disc image files. It is intended for use in: Emulator tools - converting between real floppy discs and disc images, as CPCTRANS / PCWTRANS do under DOS. Filesystem utilities - CPMTOOLS is configurable to use LIBDSK, thus allowing the use of CPMTOOLS on emulator .DSK images. COLOUR GRAPHICS ADAPTER: NOTES Colour Graphics Adapter: Notes. This document describes the behaviour of IBM's original CGA, and some clones. The CGA is a colour card. According to the IBM technical manual, it can display on one of: IBM 1391406 KEYBOARD The IBM 1391406 Keyboard. Note: You need a browser capable of displaying SVG images to see the keyboard layouts. The IBM 1391406 is the 102-key 'extended' keyboardCP/M MAIN PAGE
Information Articles. A mini-howto explaining how to get DOS Plus 1.2 (CP/M-86 v4.1) running on your PC.; Why CP/M? Dave Baldwin's USENET posting explaining his reasons for still using CP/M. A description of the Amstrad PCW16, based on seeing it demonstrated at the Crawley PCW Club.; Building CP/M 3, thoughts on cross-compiling CP/M under DOS; How to read CP/M discs on a PC CP/M INFORMATION ARCHIVE : BIOS CP/M Basic Input/Output System. The BIOS is the machine-dependent part of CP/M. In theory, all you need to do is change the BIOS and CP/M will work on a different machine. CP/M INFORMATION ARCHIVE : DISC FORMATS CP/M 4.1 disc formats. CP/M 4.1 (DOS Plus) allows the use of two filesystems - CP/M and DOS.The version I have seen (supplied with the Amstrad PC1512) cannot handle larger floppies than 360k (CP/M) / 1.2Mb (DOS), or larger hard drive partitions than 32Mb. VINTAGE PC PAGES: MULTIPLE FLOPPIES More Than Two Floppy Drives. While it is possible to get more than two floppy drives onto PCs, it's not always easy. This document discusses why, and describes various pitfalls you may encounter.THE TOSHIBA T1000
The Toshiba T1000. The T1000 is an XT-class laptop from 1987. Its specification and form factor are similar to the IBM Convertible.What makes the T1000 unusual is that it includes a MONOCHROME DISPLAY ADAPTER NOTES Register I/O 03B0h, 03B2h, 03B4h, 03B6h: CRTC address register. Write a CRTC register number (0 to 11h) to this port to select the CRTC register that will appear at port 03B5h. AMSTRAD PC TECHNICAL REFERENCE MANUAL SECTION 1 - HARDWARE 1.0 Introduction. This manual provides a comprehensive description of the AMSTRAD PC1512 hardware and firmware. General information about the PC1512, GEM Desktop and the delivered operating system software is contained in the AMSTRAD PC USER MANUAL. IBM 1391406 KEYBOARD The IBM 1391406 Keyboard. Note: You need a browser capable of displaying SVG images to see the keyboard layouts. The IBM 1391406 is the 102-key 'extended' keyboard HARDWARE - SEASIP.INFO F6h (output) sets the vertical origin of the screen. The value written to it specifies whichline ofthe Roller-RAM correspondsto the top lineof the screen. So OUT 0F6h, 8 means that the video controller will display pixel line 8 at the top of theCOMPAQ PORTABLE III
Keyboard. The keyboard controller (part number 106436-001) is probably the same one used in the Portable II. It supports all the functions of IBM's AT keyboard controller, plus a few of its own, mainly to set theprocessor speed.
Home page
JOHN ELLIOTT'S HOMEPAGETHIS SITE CONTAINS
Most (all?) of the pages in this site are dedicated to computers and/or operating systems which unkind people might describe asobsolete:
* Sinclair Spectrum items: * A section on Jet Set Willy , including an editor and a 128k version of the game; * Spectrum-related software to download . * A collection of Spectrum icons , which you are free to use in your own web pages &c. * The CP/M operating system; * The GEM GUI for the IBMPC;
* The Amstrad PCW computer / wordprocessor. * Amstrad's early XT clones , and other vintage PCs.
* There is some Unix software related to some ofthe above systems.
EXTERNAL LINK
Since I am interested in railway preservation, I might as well pointyou at:
* Railway preservation - specifically, the Bluebell Line.
I designed this page using PNGs instead of GIFs because of the obnoxious Unisys patent (now expired). I'm not racing to change back to GIFs. Apart from the PNGs, this page is written to be readable on as many browsers as possible. People who make pages only viewable under one or two browsers have greatly misunderstood the purpose of the Web. Having said that, my current favourite browser is Mozilla.
John Elliott 21-6-2004Details
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