PRIOR CONCURRENT THERAPY: Biologic therapy: Not specified Chemotherapy: No prior doxorubicin or doxorubicin HCl liposome No prior chemotherapy for non-Hodgkin's lymphoma, except single dose of intrathecal chemotherapy at time of staging lumbar puncture Endocrine therapy: Not specified Radiotherapy: Not specified Surgery: At least 2 weeks since major surgery Other: No concurrent treatment for Kaposi's sarcoma Concurrent antiretroviral therapy allowed