 | |
| Developer | Hewlett-Packard |
|---|---|
| Type | Desktop computer |
| Release date | 1980[1] |
| Introductory price | US$39,500(today $150,700)[1] |
| Discontinued | 1984 (being outcompeted by the200 series)[2] |
| CPU | Standard option 1xx: 2 x 16-bit (LPU,[3] PPU) 3-chip hybrid processor with BPC, IOC and EMC |
| Memory | 64 - 1600KB RAM 128 KB ROM[1] |
| Graphics | 560 x 455 pixels@ 3 bpp(8 color)[1] |
| Power | Mainframe:275 W (max),CRT display: 550 W (max)[1] |
| Weight | 48.1 kg (106 lb)[1] |
TheHP 9845C fromHewlett-Packard was one of the first desktop computers to be equipped with a color display andlight pen for design and illustration work. It was used to create the color war room graphics in the 1983 movieWarGames.[4][5]
The attached HP 98770A color display enabled the color graphics with its own CPU and separate power supply, avector generator based on theAMD2900bit-slice architecture, graphics memory with three planes of32 KB each, the connection interface to the mainframe consists of a direct data bus attachment, and a light-pen logic.[1]4913 colors were available.[1]
The system is abig-endian16-bit architecture, the BPC, with roots in theHP 2116A which were one of the first 16-bit microprocessors created.[6]
The display showed 8 soft keys on the lower end of the screen, 39 alignment controllers behind a door enabled fine tuning ofcolor convergence.[1]
The speed of the builtin BASIC language was accomplished by implementing time critical parts of it in CPUmicrocode.[1]
A builtin tape cartridge device with a capacity of 217 kB and transfer speed of 1440 bytes/s enabled storage of data.[1]Average access time for the unit is 6s and a rewind end to end takes 20s. The directory is stored in r/w memory to enable quick access.[7]
| Option 1xx | Option 2xx | |
|---|---|---|
| For/Next | ~95 | ~145 |
| Matrix Plot | ~200 | ~240 |
| Absolute Plot | ~5 000 | ~5 000 |
| Circles/s not clipped | ~2 | ~5 |
There are four commercial game compilations for the HP 9845 computers, all released from Hewlett-Packard:[8][9] 9845 Computer Games Collection, 9845B Computer Games Library, Computer Games Library Vol. 1 and Monte Carlo Simulation.
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