Problems using VG PROM/RAM in 8800b

[Director]

I have two 8800b's and a smattering of S-100 boards. Let me know if you
don't get any feedback & we will see if we can work something out. For some
reason we have a pile of S-100 machines. We are in Arlington, TX if you or
any others are in the neighborhood, please drop by.

Gil

A. G. (Gil) Carrick, Director
The Museum at CSE 
Coach - ICPC Programming Team
University of Texas at Arlington
Department of Computer Science & Engineering
Box 19015, 471 S Cooper Street
Arlington, TX 76019
817-272-3620
http://www.cse.uta.edu/TheMuseum@CSE/ 



> -----Original Message-----
> From: cctech-bounces at classiccmp.org 
> [mailto:cctech-bounces at classiccmp.org] On Behalf Of Richard A. Cini
> Sent: Friday, July 01, 2005 2:37 PM
> To: CCTalk
> Subject: Problems using VG PROM/RAM in 8800b
> 
> All:
> 
> 	I want to get the Turnkey Monitor running on my 8800b. 
> I have a VG PROM/RAM board (which has 1k of RAM and an EPROM 
> programmer) and some 2716 EPROMS. I made an adapter so I can 
> use 2716 chips in the 2708 sockets. So far, so good.
> 
> 	I configured the board for $C000, no RAM and all other 
> jumpers per the default for the board with the following exceptions:
> 
> 	(1) "Use PRESET or POC for power-on/reset jump" The 
> defaultis for the POC signal to be connected to the reset 
> circuitry on the VG PROM board.
> The other jumper option is to connect PRESET to the reset 
> circuit on the VG PROM board. This is now set for the PRESET 
> line to be connected to the board's POR circuit. I don't have 
> a schematic so I don't know what this is doing exactly.
> 
> 	(2) "Phantom generated if power-on/reset" This disables 
> other memory boards on reset so it can respond to the CPU 
> reset jump to location 0 (making the board an auto-start 
> board). I cut this jumper.
> 
> 	(3) "Jump to PROM/RAM board if power-on/reset" This 
> causes the board to respond to the CPU jump to location 0 on 
> RESET. I set this jumper to the equivalent of disable.
> 
> 	With this configuration, I can't EXAMINE or DEPOSIT 
> to/from any location. When I remove the board, the Altair 
> responds normally, so it definitely is this board.
> 
> 	Does anyone have any experience using this board in an 
> Altair (or other non-Vector) system? What's a working 
> configuration for this? Does anyone have a spare generic ROM 
> board I can buy/trade for?
> 
> 	Thanks.
> 
> Rich
> 
> Rich Cini
> Collector of classic computers
> Build Master for the Altair32 Emulation Project Web site: 
> http://highgate.comm.sfu.ca/~rcini/classiccmp/
> /************************************************************/
> 
> 
>