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Altos 5-15 A/D
| Description | |
| Manufacturer | International Business Machines Inc. |
| Model | 5110 |
| Date Announced | 1978 |
| Date Canceled | 1982 |
| Number Produced | Thousands |
| Country of Origin | USA |
| Price | $9,000 to $20,000 depending on configuration |
| Current Value | $250 to $1,000+ |
| Specifications | |
| Processor | IBM Processor card - no microprocessor - called "PALM" (Put All Logic in Microcode) |
| Speed | |
| RAM | 16-64K in 16K increments |
| ROM | 18K to 96K depending on language options |
| Storage | 1.2MB 8" floppy drives or 1/4 tape drives, depending on model" |
| Expansion | None internally aside from memory |
| Bus | N/A |
| Video | 16 lines x 64 characters on a 5" screen" |
| I/O | Proprietary |
| OS Options | N/A |
| Notes | The IBM 5110 followed the IBM 5100 with the intention of bringing the "IBM Portable Computer" to the mainstream - i.e. to allow it to be used for business applications as well as scientific ones. |
| Related Items in Collection | Printer, disk drive cabinet, IBM PC, IBM PC AT etc. |
| Related Items Wanted | Software, IBM 5100, etc. |
The system came with both the monster IBM printer (not pictured) and an even bigger dual 8" disk drive cabinet."

The system also came with a boxfull of documentation and software.
I haven't had a chance to plug this beast in for testing and play yet, but I hope to soon!
My company bought the first 5110 that shipped west of the Mississippi and I programed (APL) it to program NC machines. Around 1990 I bought it from them for $33. (One dollar a KB plus a dollar profit) Soon after that I read an article on how the US govt. coded and decoded messages and realized that was what the APL language was probably designed for. It makes fortran look like a 4 function calculator.
Now I know that this will date me, but I was part of the IBM group that brought the 5100 to market. The hardware was developed in Rochester and the software by a 10 person team in Westlake Village CA. I had the responsibility of testing (QA) the software and then overseeing the development of the camera ready manuals at the IBM facility in Menlo Park(user and reference for both BASIC and APL). If anyone has a copy of these manuals, please let me know.
I spent a year working on one of these. I programmed an apartment management system for a fellow in BASIC. The model we had had 16K (5K of which was OS) I came within 59 bytes of using all memory on one of the programs -- I hadn't learned to modularize programs too well at that point.
APL was a most interesting language. Those who learnt it became quite addicted. Plusses - Very powerful and compact. Several pages of FORTRAN or COBOL or BASIC became only a few lines in APL. Minuses - Very steep initial learning curve. Special character set.
These photos bring back memories for me, as well. When I was in high school my father company bought one. I learned BASIC programming on it. I seem to remember it even had a rocker switch that was used to select APL or BASIC.
WOW! I remember that monster! I learned some APL (A Programming Language) on the good old 5110. I can not remember having seen my teacher so excited as on the day the 5110 was delivered. We had some real good times together exploring the secret system-monitor (found accidently when pressed pressed some keys while turning on the machine).
*sigh* these must have been the good old days LOL
Btw. Nice site. I enjoyed looking at some ancient computers i have known myself!
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