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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YDRjtmAiNpo5mK5N3d7QwZ

content/museum/quasar-data-products-qdp-300.md

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+---
+title: Quasar Data Products QDP-300
+categories:
+- Computers
+types:
+- Professional Computer
+origins:
+- U.S.A.
+years:
+- '1982'
+cpus:
+- Z80-C
+params:
+  name: QDP-300
+  company: /companies/quasar-data-products
+  company_name: Quasar Data Products
+  specs:
+  - label: NAME
+    value: QDP-300
+  - label: MANUFACTURER
+    value: Quasar Data Products
+  - label: TYPE
+    value: Professional Computer
+  - label: ORIGIN
+    value: U.S.A.
+  - label: YEAR
+    value: November 1982
+  - label: BUILT IN LANGUAGE
+    value: None
+  - label: KEYBOARD
+    value: Serial video terminal
+  - label: CPU
+    value: Z80-C
+  - label: SPEED
+    value: 6 Mhz.
+  - label: RAM
+    value: 64 KB
+  - label: ROM
+    value: Unknown
+  - label: TEXT MODES
+    value: 80 columns x 25 lines
+  - label: COLORS
+    value: Monochrome
+  - label: SOUND
+    value: Beeper
+  - label: I/O PORTS
+    value: Serial interface
+  - label: BUILT IN MEDIA
+    value: |-
+      Dual 8'' 1.2 MB F.D. drives\
+      Optional 10 or 15 MB internal hard disk, or 30 MB external
+  - label: OS
+    value: CP/M, MP/M
+  - label: POWER SUPPLY
+    value: Built-in power supply unit
+  - label: PERIPHERALS
+    value: S-100 bus boards range
+  - label: PRICE
+    value: Unknown
+  comments:
+  - author: curt mayer (USA)
+    date: Saturday 4th September 2021
+    text: I picked one of these up for a song earlier this year. I''m disassembling the rom, and it''s heavy going. are there any docs anywhere on this amazing double high board?
+  - author: Greg Bradley (Southern California, USA)
+    date: Monday 2nd July 2018
+    text: |-
+      I became a dealer for QDP right about the time the 300 was introduced. The first 300 I received was September 1984 for $6795 List less 34$ so $4485 net. It was 1 floppy, 15Mb HD 4 user MPM with 256K Memory. The next one was a month later and the first of the high end version with 32Mb HD and a 512K Cache board. It was $9795 List.\
+      The first one ran an Automotive Parts Importer for many years as we had to upgrade the software for Y2K compatability in 1999.
+  oc_id: 616
+  source:
+    url: https://web.archive.org/web/20230603010941/http://www.old-computers.com/museum/computer.asp?c=616
+    date: '2023-06-03'
+---
+
+The hardware features of the QDP-300 were very close to those of the [QDP-100](/museum/quasar-data-products-qdp-100/) model. Apart from the shape of the case, the major differences were:\
+\- An integrated help system,\
+\- A cache memory to speed up the disk drives operations,\
+\- A new motherboard design allowing the 6 Mhz. Z80-C microprocessor to be used.
+
+The QDP-300 was backed by one-year on-site warranty performed by the General Electric Company.
+
+---
+
+**Mark Penacho** adds:\
+The Quasar Data Products QDP-300 was rebranded the **TDS-300** (by QDP) and was used as the development system for the now defunct handheld computer company Telxon in the early 80's for their handheld devices.\
+The rebranding was a darker metal case (I think dark blue), and a blue front panel. Cosmetically, the TDS version looked nicer.
+
+**Roger Chalonec** remembers:\
+I used these on US Navy ships. We ultimately had a 10meg hard drive in these I belive. We ran a pretty impressive database called MDBS (Micro Database Systems) out of Cleveland, OH.
+
+<table> <tr> <td></td> <td>We need more info about this computer ! If you designed, used, or have more info about this system, please send us pictures or anything you might find useful.</td> <td></td> </tr> </table>